O. Sauter

Details der Publikationsliste

Zeitraum

1986 - 9999

Anzahl

697

Co-Autoren

ECRH system for ITER. (2009)

Darbos, C., Henderson, M., Albajar, F., Bigelow, T., Bonicelli, T., Chavan, R., ...

18th Topical Conf.on Radio Frequency Power in Plasmas, Gent, B, June 24-26, 2009

Conceptual design of the ECH upper launcher system for ITER. (2009)

Heidinger, R., Bertizzolo, R., Bruschi, A., Chavan, R., Cirant, S., Collazos, A., ...

25th Symp.on Fusion Technology (SOFT 2008), Rostock, September 15-19, 2008

Recent progress in the ITER EC H&CD system. (2009)

Henderson, M., Albajar, F., Alberti, S., Baruah, U., Bigelow, T., Becket, B., ...

US-EU-JPN RF Heating Technology Workshop, Dazaifu-City, Fukuoka, J, September 16-18, 2009

An overview of the ITER electron cyclotron H&CD system (2009)

Henderson, M., Albajar, F., Alberti, S., Baruah, U., Bigelow, T., Becket, B., ...

34th Internat.Conf.on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2009), Busan, Korea, September 21-25, 2009

Full Bootstrap Discharge Sustainment in Steady State in the TCV Tokamak (2008)

Coda, S., Sauter, O., Henderson, M.A., Goodman, T.P.

The Advanced Tokamak scenario, one of the modes of operation being considered for ITER, relies on the attainment of a high bootstrap current fraction. This scenario is typically characterized by an...

Physics Insight and Performance Benefit from Plasma Shaping Experiments in MHD and Energy Transport in the TCV Tokamak (2008)

Pochelon, A., Brunner, S., Camenen, Y., Coda, S., Graves, J., Marinoni, A., ...

The unique flexibility of TCV in plasma shaping has been exploited to address different aspects of tokamak physics in which the plasma shape may play a role. This paper summarizes the experiments...

A revised ITER EC system baseline design proposal. (2008)

Henderson, M.A., Alberti, S., Chavan, R., Fasel, D., Goodman, T.P., Pagonakis, I.G., ...

15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, Yosemite National Park, Calif., March 10-13, 2008

Overview of the ITER EC upper launcher. (2008)

Henderson, M.A., Heidinger, R., Strauss, D., Bertizzolo, R., Bruschi, A., Chavan, R., ...

4th IAEA Technical Meeting on ECRH Physics and Technology in ITER, Wien, A, June 6-8, 2007

Recent electron cyclotron emission results on TCV (2007)

Udintsev, V. S., Turri, G., Asp, E., Schlatter, C., Goodman, T. P., Sauter, O., ...

Electron cyclotron emission (ECE) diagnostics on Tokamak a Configuration Variable (TCV) allow study of the electron temperature evolution in time with good spatial and temporal resolution at the high...

A global collisionless PIC code in magnetic coordinates (2007)

Jolliet, S., Bottino, A., Angelino, P., Hatzky, R., Tran, T. M., McMillan, B. F., ...

A global plasma turbulence simulation code, ORB5, is presented. It solves the gyrokinetic electrostatic equations including zonal flows in axisymmetric magnetic geometry. The present version of the...

Chapter 3: MHD stability, operational limits and disruptions (2007)

Hender, T. C., Wesley, J. C., Bialek, J., Bondeson, A., Boozer, A. H., Buttery, R. J., ...

Progress in the area of MHD stability and disruptions, since the publication of the 1999 ITER Physics Basis document (1999 Nucl. Fusion 39 2137-2664), is reviewed. Recent theoretical and experimental...

The physics of electron internal transport barriers in the TCV tokamak (2007)

Coda, S., Asp, E., Fable, E., Goodman, T. P., Sauter, O., Udintsev, V. S., ...

Electron internal transport barriers (elTBs) are generated in the TCV tokamak with strong electron cyclotron resonance heating in a variety of conditions, ranging from steady-state fully noninductive...

Impact of plasma triangularity and collisionality on electron heat transport in TCV L-mode plasmas (2007)

Camenen, Y., Pochelon, A., Behn, R., Bottino, A., Bortolon, A., Coda, S., ...

The impact of plasma shaping on electron heat transport is investigated in TCV L-mode plasmas. The study is motivated by the observation of an increase in the energy confinement time with decreasing...

Current profile tailoring using localized electron cyclotron heating in highly elongated TCV plasmas (2007)

Camenen, Y., Hofmann, Y. C. F., Pochelon, A., Scarabosio, A., Alberti, S., Arnoux, G., ...

Radially localized electron cyclotron heating (ECH) at the 2nd harmonic (X2) is used to tailor the current profile through the modification of the temperature, and hence conductivity, profiles. The...

Critical issues associated with the ITER ECH system. (2007)

Henderson, M.A., Saibene, G., Albajar, F., Alberti, S., Bonicelli, T., Chavan, R., ...

Workshop on RF Heating Technology of Fusion Plasmas, Heidelberg, September 10- 12, 2007

Design status of the ITER upper port launcher. (2007)

Henderson, M.A., Chavan, R., Bertizzolo, R., Bruschi, A., Ciattglia, E., Cirant, S., ...

4th IAEA Technical Meeting on ECRH Physics and Technology for ITER, Wien, A, June 6-8, 2007

Interface issues associated with the ITER ECH system. (2007)

Henderson, M.A., Saibene, G., Bonicelli, T., Chavan, R., Farina, D., Fasel, D., ...

4th IAEA Technical Meeting on ECRH Physics and Technology for ITER, Wien, A, June 6-8, 2007 Proc.on CD-ROM

Sawtooth behaviour in highly elongated TCV plasmas (2006)

Reimerdes, H., Furno, I., Hofmann, F., Martynov, A., Pochelon, A., Sauter, O.

The effect of plasma elongation kappa on the sawtooth behaviour is studied in ohmically heated TCV plasmas up to values of kappa = 2.8. Above a certain value of kappa, which varies from 2.2 to 2.6...

Edge kink/ballooning mode stability in tokamaks with separatrix (2006)

Medvedev, S. Y., Martynov, A. A., Martin, Y. R., Sauter, O., Villard, L.

Stability limits against external kink modes driven by large current density and pressure gradient values in the pedestal region are investigated for tokamak plasmas with separatrix. Stability...

A drift-kinetic Semi-Lagrangian 4D code for ion turbulence simulation (2006)

Grandgirard, V., Brunetti, M., Bertrand, P., Besse, N., Garbet, X., Ghendrih, P., ...

A new code is presented here, named Gyrokinetic SEmi-LAgragian (GYSELA) code, which solves 4D drift-kinetic equations for ion temperature gradient driven turbulence in a cylinder (r, theta, z). The...

Inward thermodiffusive particle pinch in electron internal transport barriers in TCV (2006)

Fable, E., Sauter, O., Coda, S., Goodman, T. P., Henderson, M. A., Weisen, H., ...

Electron internal transport barriers (eITBs) are obtained in TCV with different heating and current drive schemes. They are sustained in steady-state conditions for several energy confinement and...

On ion cyclotron current drive for sawtooth control (2006)

Eriksson, L. G., Johnson, T., Mayoral, M. L., Coda, S., Sauter, O., Buttery, R. J., ...

Experiments using ion cyclotron current drive (ICCD) to control sawteeth are presented. In particular, discharges demonstrating shortening of fast ion induced long sawteeth reported in (Eriksson et...

Linear stability analysis of microinstabilities in electron internal transport barrier non-inductive discharges (2006)

Bottino, A., Sauter, O., Camenen, Y., Fable, E.

The role of the current profile and ion and electron temperature ratio in Tokamak A Configuration Variable (TCV) electron internal transport barrier (eITB) noninductive discharges is inspected by...

On the definition of a kinetic equilibrium in global gyrokinetic simulations (2006)

Angelino, P., Bottino, A., Hatzky, R., Jolliet, S., Sauter, O., Tran, T. M., ...

Nonlinear electrostatic global gyrokinetic simulations of collisionless ion temperature gradient (ITG) turbulence and ExB zonal flows in axisymmetric toroidal plasmas are examined for different...

Effects of plasma current on nonlinear interactions of ITG turbulence, zonal flows and geodesic acoustic modes (2006)

Angelino, P., Bottino, A., Hatzky, R., Jolliet, S., Sauter, O., Tran, T. M., ...

The mutual interactions of ion temperature gradient (ITG) driven modes, zonal flows and geodesic acoustic modes (GAM) in tokamak plasmas are investigated using a global nonlinear gyrokinetic...

EU developments of the ITER ECRH system. (2006)

Henderson, M.A., Alberti, S., Benin, P., Bonicelli, T., Chavan, R., Campbell, D., ...

24th Symp.on Fusion Technology (SOFT 2006), Warszawa, PL, September 11-15, 2006

Sawtooth control in fusion plasmas (2005)

Graves, J. P., Buttery, R. J., Coda, J. W., Eriksson, G. G., Gimblett, C. G., Hastie, R. J., ...

This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/47/12B/S10

Influence of non-Maxwellian velocity distributions during ECRH and ECCD on electron temperature measurements by Thomson scattering (2005)

Zhuang, G., Behn, R., Klimanov, I., Nikkola, P., Sauter, O.

Deposition of electron cyclotron waves at high-power densities for heating and current drive in a tokamak plasma generates a population of fast electrons and therefore the velocity distribution of...

Inductive current density perturbations to probe electron internal transport barriers in tokamaks (2005)

Sauter, O., Coda, S., Goodman, T. P., Henderson, M. A., Behn, R., Bottino, A., ...

Improved electron energy confinement in tokamak plasmas, related to internal transport barriers, has been linked to nonmonotonic current density profiles. This is difficult to prove experimentally...

The stability of the ideal internal kink mode in realistic tokamak geometry (2005)

Martynov, A., Graves, J. P., Sauter, O.

The ideal stability of the internal kink mode is analysed for realistic tokamak geometry. Accurate numerical results demonstrate convergence with Bussac's toroidal solution (Bussac M N, Pellat R...

Active control of MHD instabilities by ECCD in ASDEX upgrade (2005)

Maraschek, M., Gantenbein, G., Goodman, T. P., Gunter, S., Howell, D. F., Leuterer, F., ...

The modification of the stability and the behaviour of core MHD with local electron cyclotron current drive (ECCD) is presented. Starting from the innermost resonant surface, the q = 1 surface, the...

Rapid electron internal transport barrier formation during magnetic shear reversal in fully non-inductive TCV discharges (2005)

Henderson, M. A., Camenen, Y., Coda, S., Fable, E., Goodman, T. P., Nikkola, P., ...

The rapid formation of an electron internal transport barrier (eITB) is observed during a slow evolution (similar or equal to 200 ms) from a centrally peaked to a hollow current density profile,...

Sawtooth control in fusion plasmas (2005)

Graves, J. P., Angioni, C., Budny, R. V., Buttery, R. J., Coda, S., Eriksson, L. G., ...

Clear observations of early triggering of neo-classical tearing modes by sawteeth with long quiescent periods have motivated recent efforts to control, and in particular destabilize, sawteeth. One...

Safety factor profile requirements for electron ITB formation in TCV (2005)

Goodman, T. P., Behn, R., Camenen, Y., Coda, S., Fable, E., Henderson, M. A., ...

On the Tokamak a Configuration Variable (TCV), electron internal transport barriers (eITBs) can be formed during a gradual evolution from a centrally peaked to a hollow current profile while all...

High-bootstrap, noninductively sustained electron internal transport barriers in the Tokamak a Configuration Variable - art. no. 056124 (2005)

Coda, S., Goodman, T. P., Henderson, M. A., Sauter, O., Behn, R., Bottino, A., ...

Important ingredients of the advanced-tokamak route to fusion have been explored in depth in the Tokamak a Configuration Variable [F. Hofmann, J. B. Lister, M. Anton , Plasma Phys. Controlled Fusion...

High-bootstrap, noninductively sustained electron internal transport barriers in the Tokamak a Configuration Variable (2005)

Coda, S., Goodman, T. P., Henderson, M. A., Sauter, O., Behn, R., Bottino, A., ...

Important ingredients of the advanced-tokamak route to fusion have been explored in depth in the Tokamak a Configuration Variable [F. Hofmann, J. B. Lister, M. Anton , Plasma Phys. Controlled Fusion...

Electron heat transport in shaped TCV L-mode plasmas (2005)

Camenen, Y., Pochelon, A., Bottino, A., Coda, S., Ryter, F., Sauter, O., ...

Electron heat transport experiments are performed in L-mode discharges at various plasma triangularities, using radially localized electron cyclotron heating to vary independently both the electron...

Fine-scale structures and negative-density regions: Comparison of numerical methods for solving the advection equation (2005)

Brunetti, M., Grandgirard, V., Bertrand, P., Sauter, O., Vaclavik, J., Villard, L.

A common feature of the Vlasov equation is that it develops fine-scale filamentation as time evolves, as observed, for example, in global nonlinear simulations of the ion-temperature-gradient...

The front steering launcher design for the ITER ECRH upper port. (2005)

Henderson, M.A., Chavan, R., Heidinger, R., Nikkola, P., Ramponi, G., Saibene, G., ...

3rd IAEA Technical Meeting on ECRH Physics and Technology for ITER, Como, I, May 2-4, 2005

Towards the realization on JET of an integrated H-mode scenario for ITER (2004)

Ongena, J., Monier-Garbet, P., Suttrop, W., Andrew, Ph., Becoulet, M., Budny, R., ...

This version is available at the following URL: http://dx.doi.org/10.1088/0029-5515/44/1/015

Density peaking in low collisionlity ELMy H-mode in JET (2004)

Valovic, M., Budny, R., Garzotti, L., Garbet, X., Korotkov, A. A., Rapp, J., ...

This version is available at the following Publisher URL: http://stacks.iop.org/0741-3335/46/1877

First principles based simulations of instabilities and turbulence (2004)

Villard, L., Angelino, P., Bottino, A., Allfrey, S. J., Hatzky, R., Idomura, Y., ...

It is now widely believed that low frequency turbulence developing from smallscale instabilities is responsible for the phenomenon of anomalous transport generally observed in magnetic confinement...

Full radius linear and nonlinear gyrokinetic simulations for tokamaks and stellarators: zonal flows, applied E x B flows, trapped electrons and finite beta (2004)

Villard, L., Allfrey, S. J., Bottino, A., Brunetti, M., Falchetto, G. L., Grandgirard, V., ...

The aim of this paper is to report on recent advances made in global gyrokinetic simulations of ion temperature gradient (ITG) modes and other microinstabilities. The nonlinear development and...

Density peaking in low collisionality ELMy H-mode in JET (2004)

Valovic, M., Budny, R., Garzotti, L., Garbet, X., Korotkov, A. A., Rapp, J., ...

Low collisionality, low particle source. ELMy H-modes (type-III) with sawteeth are produced in JET in order to address the question of density profile evolution in the reference q(95) = 3 ITER...

On the contribution of local current density to neoclassical tearing mode stabilization (2004)

Sauter, O.

Neoclassical tearing modes are driven by the reduction of bootstrap current inside the island due to the flattening of the pressure profile. This current perturbation enhances the magnetic...

Towards the realization on JET of an integrated H-mode scenario for ITER (2004)

Ongena, J., Monier-Garbet, P., Suttrop, W., Andrew, P., Becoulet, M., Budny, R., ...

ELMy H-mode experiments at JET in 2000/mid-2002 have focused on discharges with normalized parameters for plasma density, energy confinement and beta similar to those of the ITER Q(DT) = 10 reference...

Studies of burning plasma physics in the Joint European Torus (2004)

Mayoral, M. L., Buttery, R., Jones, T. T. C., Kiptily, V., Sharapov, S., Mantsinen, M. J., ...

In burning plasma experiments, the very energetic alpha (alpha) particles resulting from a deuterium-tritium fusion reaction will be the dominant heating mechanism and will give rise to new physics...

Status of and prospects for advanced tokamak regimes from multi-machine comparisons using the 'International Tokamak Physics Activity' database (2004)

Litaudon, X., Barbato, E., Becoulet, A., Doyle, E. J., Fujita, T., Gohil, P., ...

Advanced tokamak regimes obtained in ASDEX Upgrade, DIII-D, FF-U, JET, JT-60U, TCV and Tore Supra experiments are assessed both in terms of their fusion performance and capability for ultimately...

Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges (2004)

Henderson, M. A., Camenen, Y., Coda, S., Goodman, T. P., Nikkola, P., Pochelon, A., ...

Clear evidence is reported for the first time of a rapid localized reduction of core electron energy diffusivity during the formation of an electron internal-transport barrier. The transition occurs...

Control of electron internal transport barriers in TCV (2004)

Henderson, M. A., Behn, R., Coda, S., Condrea, I., Duval, B. P., Goodman, T. P., ...

Current profile tailoring has been performed by application of electron cyclotron heating (ECH) and electron cyclotron current drive, leading to improved energy confinement in the plasma core of the...

Comparison of m=2, n=1 neo-classical tearing mode limits in JET and DIII-D (2004)

Hender, T. C., Howell, D. F., Buttery, R. J., Sauter, O., Sartori, F., La Haye, R. J., ...

Joint experiments have been conducted on JET and DIII-D to study m = 2, n = I neo-classical tearing modes (NTMs). Very similar instability behaviour is observed on both machines and the scaling of...

Hybrid advanced scenarios: perspectives for ITER and new experiments with dominant RF heating (2004)

Gormezano, C., Becoulet, A., Buratti, P., Carraro, L., Crisanti, F., Esposito, B., ...

A 'hybrid' scenario for ITER is defined through its objectives: a large fusion yield for a long time duration. In many tokamaks, discharges characterized by a stationary current density profile,...

Destabilization of Fast-Ion-Induced Long Sawteeth by Localized Current Drive in the JET Tokamak (2004)

Eriksson, L.G., Mueck, A., Sauter, O., Coda, S., Mantsinen, M.J., Mayoral, M.L., ...

In a tokamak fusion reactor the energetic alpha particles will transiently stabilize the magnetohydrodynamic activity causing sawtooth oscillations. The crash events terminating long sawtooth free...

Destabilization of fast-ion-induced long sawteeth by localized current drive in the JET tokamak (2004)

Eriksson, L. G., Mueck, A., Sauter, O., Coda, S., Mantsinen, M. J., Mayoral, M. L., ...

In a tokamak fusion reactor the energetic alpha particles will transiently stabilize the magnetohydrodynamic activity causing sawtooth oscillations. The crash events terminating long sawtooth free...

On the form of NTM onset scalings (2004)

Buttery, R. J., Hender, T. C., Howell, D. F., La Haye, R. J., Parris, S., Sauter, O., ...

Theoretically, the normalized plasma pressure (beta) at which a neoclassical tearing mode (NTM) is triggered is expected to depend on normalized Larmor radius (rho*) and normalized collisionality...

Stability at high performance in the MAST spherical tokamak (2004)

Buttery, R. J., Akers, R., Arends, E., Conway, N. J., Counsell, G. F., Cunningham, G., ...

The development of reliable H-modes on MAST, together with advances in heating power and a range of high spatial resolution diagnostics, has provided a platform to enable MAST to address some of the...

A semi-Lagrangian code for nonlinear global simulations of electrostatic drift-kinetic ITG modes (2004)

Brunetti, M., Grandgirard, V., Sauter, O., Vaclavik, J., Villard, L.

A semi-Lagrangian code for the solution of the electrostatic drift-kinetic equations in straight cylinder configuration is presented. The code, CYGNE, is part of a project with the long term aim of...

Simulations of global electrostatic microinstabilities in ASDEX Upgrade discharges (2004)

Bottino, A., Peeters, A. G., Sauter, O., Vaclavik, J., Villard, L.

Electrostatic microinstabilities in ion internal barrier (ITB) and H-mode discharges of the ASDEX Upgrade tokamak [O. Gruber, R. Arslanbekov, C. Atanasiu , Nucl. Fusion 41, 1369 (2001)] have been...

Heating, current drive and energetic particle studies on JET in preparation of ITER operation (2003)

Budny,R., Cardinali,A., Castaldo,C., Cesario,R., Crisanti,F., ...

This paper summarizes the recent work on JET in the three areas of heating, current drive and energetic particles. The achievements have extended the possibilities of JET, have a direct connection to...

Neoclassical tearing modes on ASDEX Upgrade: improved scaling laws, high confinement at high βN and new stabilization experiments (2003)

Günter,S., Gantenbein,G., Gude,A., Igochine,V., Maraschek,M., Mück,A., ...

In this paper, recent results on the physics of neoclassical tearing modes (NTMs) achieved on ASDEX Upgrade are reported. A scaling law for NTM decay has been found, showing that the minimum local...

Recent results from the electron cyclotron heated plasmas in Tokamak à Configuration Variable (TCV) (2003)

Henderson,M. A., Alberti,S., Angioni,C., Arnoux,G., Behn,R., Blanchard,P., ...

In noninductively driven discharges, 0.9 MW second harmonic (X2) off-axis co-electron cyclotron current drive deposition is combined with 0.45 MW X2 central heating to create an electron internal...

Towards the realization on JET of an integrated H-mode scenario for ITER (2003)

Ongena,J., Monier-Garbet,P., Suttrop,W., Andrew,P., Bécoulet,M., Budny,R., ...

ELMy H-Mode experiments at JET since 2000 have focussed on the steady state and simultaneous realization of the ITER QDT=10 requirements in the normalized parameters for density, confinement and...

An overview of recent results from the TCV Tokamak (2003)

Goodman,T. P., Ahmed,S. M., Alberti,S., Andrèbe,Y., Angioni,C., Appert,K., ...

The TCV tokamak ( R = 0.88 m, κ = 2.5, are produced at low normalized current using far off-axis EC heating (ECH) and ECCD to broaden the current profile. Third harmonic heating is used to heat the...

Neoclassical tearing modes on AUG: improved scaling laws, high confinement at high βN and new stabilization experiments (2003)

Günter,S., Gantenbein,G., Gude,A., Igochine,V., Maraschek,M., Sauter,O., ...

The accuracy of the scaling laws derived so far for the normalised beta values at the onset of neoclassical tearing modes is limited as the results depend on the presence and magnitude of seed...

Control of the sawtooth instability by electron cyclotron heating and current drive in the TCV and ASDEX Upgrade tokamaks (2003)

Goodman,T. P., Mück,A., Angioni,C., Henderson,M. A., Sauter,O., Ryter,F., ...

Recently, there has been increased interest in avoiding the destabilization of neoclassical tearing modes (NTMs) by controlling the sawtooth instability which frequently provides a large enough seed...

Edge localized modes in DIII-D high performance discharges (2003)

Turnbull,A. D., Lao,L. L., Osborne,T. H., Sauter,O., Strait,E. J., Taylor,T. S., ...

A new understanding of edge localized modes (ELMs) in tokamak discharges is emerging (Snyder P B et al 2002 Phys. Plasmas 9 2037), in which the ELM is an essentially ideal magnetohydrodynamic (MHD)...

Effects of localized electron heating and current drive on the sawtooth period (2003)

Angioni,C., Goodman,T. P., Henderson,M. A., Sauter,O.

Localized electron heating and current drive, like those produced by electron cyclotron heating (ECH) systems, are powerful tools for controlling the sawtooth period. They allow the direct...

Report on the 10th European Fusion Physics Workshop (Vaals, The Netherlands, 9–11 December 2002) (2003)

Campbell,D. J., Borba,D., Bucalossi,J., Moreau,D., Sauter,O., Stober,J., ...

The 10th European Fusion Physics Workshop took place in December 2002 at Vaals in The Netherlands, hosted by the Trilateral Euregio Cluster (TEC: Associations EURATOM-ERM/KMS, FZJ and FOM), and...

Sawtooth, neo-classical tearing mode and error field studies in JET (2003)

Hender,T. C., Sauter,O., Alper,B., Angioni,C., De Baar,M. R., De Benedetti,M., ...

A range of ITER relevant plasma stability issues has been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawtooth seeds, scaling of m=2, n=1...

Overview of ASDEX Upgrade results (2003)

Zohm,H., Angioni,C., Arslanbekov,R., Atanasiu,C., Becker,G., Becker,W., ...

Recent results from the ASDEX Upgrade experimental campaigns 2001 and 2002 are presented. An improved understanding of energy and particle transport emerges in terms of a 'critical gradient' model...

Application of ICRF waves in tokamaks beyond heating (2003)

Mantsinen,M. J., Gauthier,E., Hoang,G. T., Joffrin,E., Koch,R., ...

Interaction of waves in the ion cyclotron range of frequencies (ICRF) with a plasma has a number of key properties that make them attractive beyond pure heating. First, the waves can interact...

Integrated scenario in JET using real-time profile control (2003)

Joffrin,E., Crisanti,F., Felton,R., Litaudon,X., Mazon,D., Moreau,D., ...

The recent development of real-time measurements and control tools in JET has enhanced the reliability and reproducibility of the relevant ITER scenarios. Diagnostics such as charge exchange,...

Heating, current drive and energetic particle studies on JET in preparation of ITER operation (2003)

Budny, R., Cardinali, A., Castaldo, C., Cesario, R., Crisanti, F., ...

This paper summarizes the recent work on JET in the three areas of heating, current drive and energetic particles. The achievements have extended the possibilities of JET, have a direct connection to...

Neoclassical tearing modes on ASDEX Upgrade: improved scaling laws, high confinement at high βN and new stabilization experiments (2003)

Günter, S., Gantenbein, G., Gude, A., Igochine, V., Maraschek, M., Mück, A., ...

In this paper, recent results on the physics of neoclassical tearing modes (NTMs) achieved on ASDEX Upgrade are reported. A scaling law for NTM decay has been found, showing that the minimum local...

Recent results from the electron cyclotron heated plasmas in Tokamak à Configuration Variable (TCV) (2003)

Henderson, M. A., Alberti, S., Angioni, C., Arnoux, G., Behn, R., Blanchard, P., ...

In noninductively driven discharges, 0.9 MW second harmonic (X2) off-axis co-electron cyclotron current drive deposition is combined with 0.45 MW X2 central heating to create an electron internal...

Towards the realization on JET of an integrated H-mode scenario for ITER (2003)

Ongena, J., Monier-Garbet, P., Suttrop, W., Andrew, P., Bécoulet, M., Budny, R., ...

ELMy H-Mode experiments at JET since 2000 have focussed on the steady state and simultaneous realization of the ITER QDT=10 requirements in the normalized parameters for density, confinement and...

An overview of recent results from the TCV Tokamak (2003)

Goodman, T. P., Ahmed, S. M., Alberti, S., Andrèbe, Y., Angioni, C., Appert, K., ...

The TCV tokamak ( R = 0.88 m, κ = 2.5, are produced at low normalized current using far off-axis EC heating (ECH) and ECCD to broaden the current profile. Third harmonic heating is used to heat the...

Neoclassical tearing modes on AUG: improved scaling laws, high confinement at high βN and new stabilization experiments (2003)

Günter, S., Gantenbein, G., Gude, A., Igochine, V., Maraschek, M., Sauter, O., ...

The accuracy of the scaling laws derived so far for the normalised beta values at the onset of neoclassical tearing modes is limited as the results depend on the presence and magnitude of seed...

Control of the sawtooth instability by electron cyclotron heating and current drive in the TCV and ASDEX Upgrade tokamaks (2003)

Goodman, T.P., Mück, A., Angioni, C., Henderson, M.A., Sauter, O., Ryter, F., ...

Recently, there has been increased interest in avoiding the destabilization of neoclassical tearing modes (NTMs) by controlling the sawtooth instability which frequently provides a large enough seed...

Edge localized modes in DIII-D high performance discharges (2003)

Turnbull, A. D., Lao, L. L., Osborne, T. H., Sauter, O., Strait, E. J., Taylor, T. S., ...

A new understanding of edge localized modes (ELMs) in tokamak discharges is emerging (Snyder P B et al 2002 Phys. Plasmas 9 2037), in which the ELM is an essentially ideal magnetohydrodynamic (MHD)...

Effects of localized electron heating and current drive on the sawtooth period (2003)

Angioni, C., Goodman, T. P., Henderson, M. A., Sauter, O.

Localized electron heating and current drive, like those produced by electron cyclotron heating (ECH) systems, are powerful tools for controlling the sawtooth period. They allow the direct...

Report on the 10th European Fusion Physics Workshop (Vaals, The Netherlands, 9–11 December 2002) (2003)

Campbell, D. J., Borba, D., Bucalossi, J., Moreau, D., Sauter, O., Stober, J., ...

The 10th European Fusion Physics Workshop took place in December 2002 at Vaals in The Netherlands, hosted by the Trilateral Euregio Cluster (TEC: Associations EURATOM-ERM/KMS, FZJ and FOM), and...

Sawtooth, neo-classical tearing mode and error field studies in JET (2003)

Hender, T. C., Sauter, O., Alper, B., Angioni, C., De Baar, M. R., De Benedetti, M., ...

A range of ITER relevant plasma stability issues has been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawtooth seeds, scaling of m=2, n=1...

Overview of ASDEX Upgrade results (2003)

Zohm, H., Angioni, C., Arslanbekov, R., Atanasiu, C., Becker, G., Becker, W., ...

Recent results from the ASDEX Upgrade experimental campaigns 2001 and 2002 are presented. An improved understanding of energy and particle transport emerges in terms of a 'critical gradient' model...

Application of ICRF waves in tokamaks beyond heating (2003)

Mantsinen, M. J., Gauthier, E., Hoang, G. T., Joffrin, E., Koch, R., ...

Interaction of waves in the ion cyclotron range of frequencies (ICRF) with a plasma has a number of key properties that make them attractive beyond pure heating. First, the waves can interact...

Integrated scenario in JET using real-time profile control (2003)

Joffrin, E., Crisanti, F., Felton, R., Litaudon, X., Mazon, D., Moreau, D., ...

The recent development of real-time measurements and control tools in JET has enhanced the reliability and reproducibility of the relevant ITER scenarios. Diagnostics such as charge exchange,...

Overview of ASDEX upgrade results (2003)

Zohm, H., Angioni, C., Arslanbekov, R., Atanasiu, C., Becker, G., Becker, W., ...

Recent results from the ASDEX Upgrade experimental campaigns 2001 and 2002 are presented. An improved understanding of energy and particle transport emerges in terms of a 'critical gradient' model...

Edge localized modes in DIII-D high performance discharges (2003)

Turnbull, A. D., Lao, L. L., Osborne, T. H., Sauter, O., Strait, E. J., Taylor, T. S., ...

A new understanding of edge localized modes (ELMs) in tokamak discharges is emerging (Snyder P B et al 2002 Phys. Plasmas 9 2037), in which the ELM is an essentially ideal magnetohydrodynamic (MHD)...

Experimental test of damping models for n=1 toroidal Alfven eigenmodes in JET (2003)

Testa, D., Fu, G. Y., Jaun, A., Fasoli, A., Sauter, O.

The damping rate of the n = 1 toroidal Alfven eigenmodes (TAE) mode in Ohmic-heated JET plasmas has been measured and compared with the prediction of the kinetic NOVA-K code, which includes electron...

Study of nonlinear mode coupling during neoclassical tearing modes using bispectrum analysis (2003)

Raju, D., Sauter, O., Lister, J. B.

It is sometimes observed that several neoclassical tearing modes (NTMs) are present at the same time. This can happen both at the mode onset of a new NTM or during the nonlinear saturated phase of a...

Overview of JET results (2003)

Pamela, J., Solano, E. R., Adams, J. M., Agarici, G., Agarici, M., Akhter, H., ...

Scientific and technical activities on JET focus on the issues likely to affect the ITER design and operation. Our understanding of the ITER reference mode of operation, the ELMy H-mode, has...

Heating, current drive and energetic particle studies on JET in preparation of ITER operation (2003)

Noterdaeme, J. M., Budny, R., Cardinali, A., Castaldo, C., Cesario, R., Crisanti, F., ...

This paper summarizes the recent work on JET in the three areas of heating, current drive and energetic particles. The achievements have extended the possibilities of JET, have a direct connection to...

Modelling of the electron cyclotron current drive experiments in the TCV tokamak (2003)

Nikkola, P., Sauter, O., Behn, R., Coda, S., Condrea, I., Goodman, T. P., ...

With the very high electron cyclotron (EC) wave power density achieved in the TCV tokamak, more than 20 MW m(-3), quasilinear modelling predicts an electron cyclotron current drive (ECCD) efficiency...

Accessibility and properties of ELMy H-mode and ITB plasmas in TCV (2003)

Martin, Y. R., Henderson, M. A., Alberti, S., Amorim, P., Andrebe, Y., Appert, K., ...

This paper presents experimental results on the accessibility and the properties of plasmas with improved confinement in TCV. First, the H-mode threshold power is measured in Ohmic plasmas. Above an...

Scaling of the marginal beta(p) of neoclassical tearing modes during power ramp-down experiments in ASDEX Upgrade (2003)

Maraschek, M., Sauter, O., Gunter, S., Zohm, H.

Based on the models describing the behaviour of neoclassical tearing modes (NTMs), fits for the seed-island triggered excitation and disappearance of these modes at small beta-values have been tested...

Application of ICRF waves in tokamaks beyond heating (2003)

Mantsinen, M. J., Eriksson, L. G., Gauthier, E., Hoang, G. T., Joffrin, E., Koch, R., ...

Interaction of waves in the ion cyclotron range of frequencies (ICRF) with a plasma has a number of key properties that make them attractive beyond pure heating. First, the waves can interact...

Overview of recent experimental results on MAST (2003)

Lloyd, B., Ahn, J. W., Akers, R. J., Appel, L. C., Arends, E. R., Axon, K. B., ...

The low aspect ratio of the mega amp spherical tokamak (MAST) allows differentiation between different forms of the H-mode threshold scaling. With optimized fuelling using inboard puffing, and a...

Integrated scenario in JET using real-time profile control (2003)

Joffrin, E., Crisanti, F., Felton, R., Litaudon, X., Mazon, D., Moreau, D., ...

The recent development of real-time measurements and control tools in JET has enhanced the reliability and reproducibility of the relevant ITER scenarios. Diagnostics such as charge exchange,...

Recent results from the electron cyclotron heated plasmas in Tokamak a Configuration Variable (TCV) (2003)

Henderson, M. A., Alberti, S., Angioni, C., Arnoux, G., Behn, R., Blanchard, P., ...

In noninductively driven discharges, 0.9 MW second harmonic (X2) off-axis co-electron cyclotron current drive deposition is combined with 0.45 MW X2 central heating to create an electron internal...

Neoclassical tearing modes on ASDEX upgrade: improved scaling laws, high confinement at high, beta N and new stabilization experiments (2003)

Gunter, S., Gantenbein, G., Gude, A., Igochine, V., Maraschek, M., Muck, A., ...

In this paper, recent results on the physics of neoclassical tearing modes (NTMs) achieved on ASDEX Upgrade are reported. A scaling law for NTM decay has been found, showing that the minimum local...

The internal kink mode in an anisotropic flowing plasma with application to modeling neutral beam injected sawtoothing discharges (2003)

Graves, J. P., Sauter, O., Gorelenkov, N. N.

For some time it has not been clear to what extent neutral injected beam ions have a stabilizing influence on sawteeth. To investigate this, the well known toroidal internal kink instability is...

An overview of results from the TCV tokamak (2003)

Goodman, T. P., Ahmed, S. M., Alberti, S., Andrebe, Y., Angioni, C., Appert, K., ...

The Tokamak Configuration Variable (TCV) tokamak (R = 0.88 m, a < 0.25 m, B < 1.54 T) programme is based on flexible plasma shaping and heating for studies of confinement, transport, control and...

Electron cyclotron current drive and suprathermal electron dynamics in the TCV tokamak (2003)

Coda, S., Alberti, S., Blanchard, P., Goodman, T. P., Henderson, M. A., Nikkola, P., ...

Electron cyclotron current drive (ECCD) is an important prospective tool for tailoring the current profile in nextstep devices. To fill the remaining gaps between ECCD theory and experiment,...

Onset of neoclassical tearing modes on JET (2003)

Buttery, R. J., Hender, T. C., Howell, D. F., La Haye, R. J., Sauter, O., Testa, D.

A detailed study has been made of the onset and behaviour of (m = 3, n = 2) neoclassical tearing modes (NTMs) on JET, validating many of the underlying concepts in NTM physics. In particular, fitting...

Effects of localized electron heating and current drive on the sawtooth period (2003)

Angioni, C., Goodman, T. P., Henderson, M. A., Sauter, O.

Localized electron heating and current drive, like those produced by electron cyclotron heating (ECH) systems, are powerful tools for controlling the sawtooth period. They allow the direct...

Control of sawteeth and triggering of NTMs with ion cyclotron resonance frequency waves in JET (2002)

Westerhof,E., Sauter,O., Mayoral,M. L., Howell,D. F., Mantsinen,M. J., Nave,M. F. F., ...

A new scenario to delay or prevent neoclassical tearing mode (NTM) onset is presented. By active sawtooth destabilization, short period and low amplitude sawteeth are generated, such that the...

Long timescale density peaking in JET (2002)

Valovic,M., Rapp,J., Cordey,J. G., Budny,R., McDonald,D. C., Garzotti,L., ...

Long timescale density peaking has been observed in JET plasmas leading to densities exceeding the Greenwald value. These neutral beam heated discharges are characterized by type-I ELMS and good...

High density, high performance high-confinement-mode plasmas in the Joint European Torus (JET) (2002)

Suttrop,W., Ongena,J., Becoulet,M., Cordey,J. G., Dumortier,P., Huysmans,G. T. A., ...

Recent experiments at the Joint European Torus [Rebut , Fusion Eng. Des. 22, 7 (1993)] aim to improve confinement quality in high-confinement-mode (H-mode) plasmas at high densities. Energy...

High density, high performance high-confinement-mode plasmas in the Joint European Torus (JET) (2002)

Suttrop, W., Ongena, J., Becoulet, M., Cordey, J. G., Dumortier, P., Huysmans, G. T. A., ...

Recent experiments at the Joint European Torus [Rebut , Fusion Eng. Des. 22, 7 (1993)] aim to improve confinement quality in high-confinement-mode (H-mode) plasmas at high densities. Energy...

Long timescale density peaking in JET (2002)

Valovic, M., Rapp, J., Cordey, J. G., Budny, R., McDonald, D. C., Garzotti, L., ...

Long timescale density peaking has been observed in JET plasmas leading to densities exceeding the Greenwald value. These neutral beam heated discharges are characterized by type-I ELMS and good...

Control of sawteeth and triggering of NTMs with ion cyclotron resonance frequency waves in JET (2002)

Westerhof, E., Sauter, O., Mayoral, M. L., Howell, D. F., Mantsinen, M. J., Nave, M. F. F., ...

A new scenario to delay or prevent neoclassical tearing mode (NTM) onset is presented. By active sawtooth destabilization, short period and low amplitude sawteeth are generated, such that the...

Long time-scale density peaking in JET (2002)

Valovic, M., Rapp, J., Cordey, J. G., Budny, R., McDonald, D. C., Garzotti, L., ...

This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/44/9/309

ELM moderation with ICRF heating on JET (2002)

Maddison, G. P., Snipes, J. A., Chareau, J. M., Conway, G. D., Hutchinson, I. H., Ingesson, L. C., ...

This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/44/9/312

Control of neoclassical tearing modes by Sawtooth control (2002)

Sauter, O., Westerhof, E., Mayoral, I. C., Alper, B., Balo, P. A., Gondhalekar, A., ...

This version is available at the following Publisher URL: http://prl.aps.org

Control of sawteeth and triggering of NTMs with ion cyclotron resonance frequency waves in JET (2002)

Westerhof, E., Sauter, O., Mayoral, M. L., Howell, D. F., Mantsinen, M. J., Nave, M. F. F., ...

A new scenario to delay or prevent neoclassical tearing mode (NTM) onset is presented. By active sawtooth destabilization, short period and low amplitude sawteeth are generated, such that the...

Shape dependence of sawtooth inversion radii and profile peaking factors in TCV L mode plasmas (2002)

Weisen, H., Furno, I., Alberti, S., Angioni, C., Appert, K., Behn, R., ...

Sawtooth inversion radii and profile peaking factors of a large variety of ohmic and ECH heated L mode plasmas, including, elongations up to 2.6 and triangularities between -0.5 and 0.75, have been...

Radial electric fields and global electrostatic microinstabilities in tokamaks and stellarators (2002)

Villard, L., Bottino, A., Sauter, O., Vaclavik, J.

The effects of applied radial electric fields on the stability of ion temperature gradient (ITG) modes and trapped particle modes are investigated with a full radius gyrokinetic formulation in both...

Long timescale density peaking in JET (2002)

Valovic, M., Rapp, J., Cordey, J. G., Budny, R., McDonald, D. C., Garzotti, L., ...

Long timescale density peaking has been observed in JET plasmas leading to densities exceeding the Greenwald value. These neutral beam heated discharges are characterized by type-I ELMS and good...

High density, high performance high-confinement-mode plasmas in the Joint European Torus (JET) (2002)

Suttrop, W., Ongena, J., Becoulet, M., Cordey, J. G., Dumortier, P., Huysmans, G. T. A., ...

Recent experiments at the Joint European Torus [Rebut , Fusion Eng. Des. 22, 7 (1993)] aim to improve confinement quality in high-confinement-mode (H-mode) plasmas at high densities. Energy...

Control of neoclassical tearing modes by sawtooth control (2002)

Sauter, O., Westerhof, E., Mayoral, M. L., Alper, B., Belo, P. A., Buttery, R. J., ...

The onset of a neoclassical tearing mode (NTM) depends on the existence of a large enough seed island. It is shown in the Joint European Torus that NTMs can be readily destabilized by long-period...

Marginal beta-limit for neoclassical tearing modes in JET H-mode discharges (2002)

Sauter, O., Buttery, R. J., Felton, R., Hender, T. C., Howell, D. F.

A neoclassical tearing mode (NTM) requires a finite size seed island to become unstable. Usually the local pressure gradient is relatively large at the beta-values needed for these seed islands to...

From current-driven to neoclassically driven tearing modes (2002)

Reimerdes, H., Sauter, O., Goodman, T., Pochelon, A.

In the TCV tokamak, the m/n = 2/1 island is observed in low-density discharges with central electron-cyclotron current drive. The evolution of its width has two distinct growth phases, one of which...

Overview of results and possibilities for fast particle research on JET (2002)

Pamela, J., Stork, D., Solano, E., Baranov, Y. F., Borba, D., Challis, C. D., ...

The large physical size of the JET tokamak, its heating systems and diagnostics, and its capability to operate with full deuterium-tritium (D-T) plasmas, including high-power tritium neutral beam...

ECH physics and new operational regimes on TCV (2002)

Moret, J. M., Ahmed, S. M., Alberti, S., Andrebe, Y., Appert, K., Arnoux, G., ...

The physics of tokamak plasmas, in which electrons are heated by electron cyclotron heating (ECH) and whose current is driven by electron cyclotron current drive (ECCD), is investigated in this paper...

Analysis of ion cyclotron heating and current drive at omega approximate to 2 omega(cH) for sawtooth control in JET plasmas (2002)

Mantsinen, M. J., Angioni, C., Eriksson, L. G., Gondhalekar, A., Hellsten, T., Johnson, T., ...

Ion cyclotron heating and current drive at omega approximate to 2omega(cH) in JET deuterium plasmas with a hydrogen concentration n(H)/(n(D)+n(H)) in the range of 5-15% are analysed, comparing...

ELM moderation with ICRF heating on JET (2002)

Maddison, G. P., Snipes, J. A., Chareau, J. M., Conway, G. D., Hutchinson, I. H., Ingesson, L. C., ...

A high-density, ELM-free, 'enhanced Dalpha' (EDA) H-mode has been demonstrated with Ohmic or RF heating on the Alcator C-Mod device. An allied 'low particle confinement' H-regime was also observed...

Error field locked modes thresholds in rotating plasmas, anomalous braking and spin-up (2002)

Lazzaro, E., Buttery, R. J., Hender, T. C., Zanca, P., Fitzpatrick, R., Bigi, M., ...

The mechanisms of nonlinear interaction of external helical fields with a rotating plasma are investigated analyzing the results of recent systematic experiments on the Joint European Torus (JET) [A....

Effect of ELMS on the measurement of vertical plasma position in TCV and JET (2002)

Hofmann, F., Furno, I., Gerasimov, S., Martin, Y., Milani, F., Nave, M. F. F., ...

The effect of ELMS on the vertical position observer in TCV has been investigated and a new, optimized, observer which minimizes the influence of ELMS has been constructed. The new observer has been...

Extension of the TCV operating space towards higher elongation and higher normalized current (2002)

Hofmann, F., Coda, S., Lavanchy, P., Llobet, X., Marmillod, P., Martin, Y., ...

Recently, an experimental campaign has been launched on TCV with the aim of exploring and extending the limits of the operating space. The vertical position control system has been optimized, with...

Neoclassical tearing physics in the spherical tokamak MAST (2002)

Buttery, R. J., Sauter, O., Akers, R., Gryaznevich, M., Martin, R., Warrick, C. D., ...

Results from MAST provide a first test of neoclassical tearing mode physics in the spherical tokamak (ST). The mode accounts for the main performance limit in conventional tokamaks. Its behavior in...

Neutral beam stabilization of sawtooth oscillations in JET (2002)

Angioni, C., Pochelon, A., Gorelenkov, N. N., McClements, K. G., Sauter, O., Budny, R. V., ...

Recent experiments in the Joint European Torus (JET) have provided evidence of sawtooth stabilization by fast ions arising from deuterium neutral beam injection (NBI). A possible theoretical basis...

The role of radial electric fields in linear and nonlinear gyrokinetic full radius simulations (2002)

Allfrey, S.J., Bottino, A., Sauter, O., Villard, L.

The pivotal role played by radial electric fields in the development of turbulence associated with anomalous transport is examined by means of global gyrokinetic simulations. It is shown that the...

Full absorption of third harmonic ECH in TCV tokamak plasmas in the presence of second harmonic ECCD (2002)

Alberti, S., Goodman, T. P., Henderson, M. A., Manini, A., Moret, J. M., Gomez, P., ...

An experimental study of the extraordinary mode (X mode) absorption at the third electron cyclotron harmonic frequency has been performed on the TCV tokamak in plasmas preheated by X mode at the...

Sawtooth, Neo-Classical Tearing Mode and Error Field Studies in JET (2002)

T.C. Hender, O. Sauter, B. Alper, C. Angioni, M. Baar, M. Benedetti, ...

A range of ITER relevant plasma stability issues have been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawteeth seeds, scaling of (2,1)...

Recent progress on JET towards the ITER reference mode of operation at high density (2001)

Ongena, J., Suttrop, W., Becoulet, M., Cordey, G., Dumortier, P., Eich, Th., ...

This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/43/12A/302

Overview of TCV results (2001)

Weisen, H., Alberti, S., Angioni, C., Appert, K., Bakos, J., Behn, R., ...

The TCV tokamak (R = 0.88 in, a < 0.25 in, BT < 1.54 T) is equipped with six 0.5 MW gyrotron sources operating at 82.7 GHz for second harmonic X mode ECH. By distributing the ECCD current sources...

Sustained fully non-inductive scenarios using pressure and current profile control with ECCD (2001)

Sauter, O., Goodman, T. P., Coda, S., Henderson, M., Hofmann, F., Hogge, J. P., ...

The ECW system on Tokamak a configuration variable (TCV) allows the study of a wide range of poloidal and toroidal launch angles. Both electron cyclotron heating (ECH) and electron cyclotron current...

Steady-state fully noninductive operation with electron cyclotron current drive and current profile control in the tokamak a configuration variable (TCV) (2001)

Sauter, O., Angioni, C., Coda, S., Gomez, P., Goodman, T. P., Henderson, M. A., ...

Fully noninductive, steady-state electron cyclotron current drive (ECCD) has been demonstrated for the first time in experiments carried out in the tokamak a configuration variable (TCV) [O. Sauter ,...

Modelling of macroscopic magnetic islands in tokamaks (2001)

Porcelli, F., Airoldi, A., Angioni, C., Bruschi, A., Buratti, P., Califano, F., ...

The article presents experimental and theoretical investigations on the dynamics of saw-teeth and neoclassical tearing modes in tokamak plasmas. The main findings of these investigations are: (1) The...

Plasma shape effects on sawtooth/internal kink stability and plasma shaping using electron cyclotron wave current profile tailoring in TCV (2001)

Pochelon, A., Hofmann, F., Reimerdes, H., Angioni, C., Behn, R., Duquerroy, R., ...

The effect of plasma shaping (triangularity and elongation) on sawtooth stability is addressed as well as the technique of current profile broadening using off-axis ECH to enlarge the operational...

Long-pulse improved central electron confinement in the TCV tokamak with electron cyclotron heating and current drive (2001)

Pietrzyk, Z. A., Angioni, C., Behn, R., Coda, S., Goodman, T. P., Henderson, M. A., ...

Current profile tailoring by electron cyclotron heating (ECH) and current drive (ECCD) is used to improve central electron energy confinement in the TCV tokamak. Counter-ECCD on axis alone achieves...

Recent progress on JET towards the ITER reference mode of operation at high density (2001)

Ongena, J., Suttrop, W., Becoulet, M., Cordey, G., Dumortier, P., Eich, T., ...

Recent progress towards obtaining high density and high confinement in JET as required for the ITER reference scenario at Q = 10 is summarized. Plasmas with simultaneous confinement H-98(y.2) = 1 and...

Stability and energy confinement of highly elongated plasmas in TCV (2001)

Hofmann, F., Behn, R., Coda, S., Goodman, T. P., Henderson, M., Lavanchy, P., ...

The operating space of the TCV tokamak has been extended to higher elongation, kappa = 2.8, and higher normalized current, I-N = I-p/aB = 3.6MA/mT, than were previously attainable. This has been...

Poloidally asymmetric plasma response with ECH deposition near q=1 in TCV (2001)

Henderson, M. A., Goodman, T. P., Hogge, J. P., Pietrzyk, Z. A., Pochelon, A., Sauter, O.

A small component of ECCD exists when heating off-axis with no toroidal injection due to the field helicity. The sign of the ECCD will change depending on the absorption location in a poloidal plane,...

ICRF current drive experiments on JET (2001)

Nguyen, F., Noterdame, J., Mayoral, M., Hellsten, T., Mantsinen, M., Hartmann, D., ...

Proceedings of the 28th EPS Conference on Controlled Fusion and Plasma Physics. Funchal, Madeira, PT, 18 - 22 June 2001. CD-ROM

Considerations on energy confinement time scalings using present tokamak databases and prediction for ITER size experiments (2000)

Sauter, O., Martin, Y.

The prediction of the thermal energy confinement time, tau(th), for ITER size experiments is based on power law scalings obtained using data sets of present tokamak results in specific regimes, the...

Steady-state fully noninductive current driven by electron cyclotron waves in a magnetically confined plasma (2000)

Sauter, O., Henderson, M. A., Hofmann, F., Goodman, T., Alberti, S., Angioni, C., ...

A steady-state, fully noninductive plasma current has been sustained for the first time in a tokamak using electron cyclotron current drive only. In this discharge, 123 kA of current have been...

Effect of triangular and elongated plasma shape on the sawtooth stability (2000)

Reimerdes, H., Pochelon, A., Sauter, O., Goodman, T. P., Henderson, M. A., Martynov, A.

In the TCV tokamak the sawtooth period and the sawtooth amplitude are observed to depend strongly on the shape of the poloidal plasma cross section. Systematic scans of plasma elongation and...

Model for humpback relaxation oscillations (2000)

Porcelli, F., Angioni, C., Behn, R., Furno, I., Goodman, T., Henderson, M. A., ...

An interpretation of non-standard, central MHD events in the TCV tokamak during localized ECRH is presented. It is shown that the non-standard behaviour is a consequence of specific features in the...

Central electron temperature enhancements due to sawtooth stabilization during counter electron cyclotron current drive in Tokamak a Configuration Variable (2000)

Pietrzyk, Z. A., Angioni, C., Behn, R., Coda, S., Goodman, T. P., Henderson, M. A., ...

In the Tokamak a Configuration Variable (TCV), the central electron temperature obtained in discharges with counter (CNTR) electron cyclotron current drive (ECCD) is larger than with CO-ECCD or...

High-power ECH and fully non-inductive operation with ECCD in the TCV tokamak (2000)

Coda, S., Goodman, T. P., Henderson, M. A., Hofmann, F., Pietrzyk, Z. A., Sauter, O., ...

Experiments with high-power electron cyclotron heating (ECH) and current drive (ECCD) in the TCV tokamak are discussed. Power up to 2.7 MW from six gyrotrons is delivered to the tokamak at the...

Neoclassical tearing modes (2000)

Buttery, R. J., Gunter, S., Giruzzi, G., Hender, T. C., Howell, D., Huysmans, G., ...

Neoclassical tearing modes are one of the most serious concerns for operation on a next-step tokamak device. The modes occur on present tokamaks at normalized pressure (beta (N)) values comparable to...

Neoclassical transport coefficients for general axisymmetric equilibria in the banana regime (2000)

Angioni, C., Sauter, O.

Using the standard approach of neoclassical theory, a set of relatively simple kinetic equations has been obtained, suited for an implementation in a numerical code to compute a related set of...

"Profile consistency" features in strongly shaped Ohmic tokamak plasmas (1999)

Weisen, H., Behn, R., Furno, I., Moret, J. M., Sauter, O.

A large variety of shaped tokamak discharges have been created in the Tokamak a Configuration Variable (TCV) with main parameters B-T

Neoclassical conductivity and bootstrap current formulas for general axisymmetric equilibria and arbitrary collisionality regime (1999)

Sauter, O., Angioni, C., Lin-Liu, Y. R.

Expressions for the neoclassical resistivity and the bootstrap current coefficients in terms of aspect ratio and collisionality are widely used in simulating toroidal axisymmetric equilibria and...

Energy confinement and MHD activity in shaped TCV plasmas with localized electron cyclotron heating (1999)

Pochelon, A., Goodman, T. P., Henderson, M., Angioni, C., Behn, R., Coda, S., ...

Confinement in TCV electron cyclotron heated discharges was studied as a function of plasma shape, i.e. as a function of elongation, 1.1 < kappa < 2.15, and triangularity, -0.65 less than or equal to...

Behaviour of central plasma relaxation oscillations during localized electron cyclotron heating on the TCV tokamak (1999)

Pietrzyk, Z. A., Pochelon, A., Goodman, T. P., Henderson, M. A., Hogge, J. P., Reimerdes, H., ...

During initial studies of ECRH in the TCV tokamak, non-standard central MHD activities, such as humpbacks and saturated and inverted sawteeth, have been observed while changing the heating location,...

'Profile consistency' features in shaped sawtoothing ohmic TCV plasmas (1998)

Weisen, H., Behn, R., Furno, I., Moret, J. M., Sauter, O.

A large variety of plasma conditions has been created in TCV (Tokamak a Configuration Variable, B-T < 1.5 T, R-0 = 0.88 m, a < 0.25 m). They include limited and diverted discharges with elongations...

Threshold for metastable tearing modes in DIII-D (1998)

La Haye, R. J., Sauter, O.

At sufficiently high poloidal beta beta(theta) and low collisionality, m/n = 3/2 tearing modes are excited in the DIII-D tokamak by a q = 1 sawtooth crash perturbation. The resulting islands of full...

Experimental and theoretical stability limits of highly elongated tokamak plasmas (1998)

Hofmann, F., Sauter, O., Reimerdes, H., Furno, I., Pochelon, A.

Stability limits of highly elongated, D-shaped plasmas have been measured in the TCV (tokamak a configuration variable) tokamak. It is found that the plasma current is limited by kink-type...

Finite element approach to global gyrokinetic Particle-In-Cell simulations using magnetic coordinates (1998)

Fivaz, M., Brunner, S., De Ridder, G., Sauter, O., Tran, T. M., Vaclavik, J., ...

We present a fully-global linear gyrokinetic simulation code (GYGLES) aimed at describing the unstable spectrum of the ion-temperature-gradient modes in toroidal geometry. We formulate the...

Beta limits in long-pulse tokamak discharges (1997)

Sauter, O., LaHaye, R.J., Chang, Z., Gates, D.A., Kamada, Y., Zohm, H., ...

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying...

Effect of plasma shape on confinement and MHD behaviour in TCV (1997)

Weisen, H., Alberti, S., Berry, S., Behn, R., Blanchard, P., Bosshard, P., ...

The TCV tokamak (B-T < 1.5 T, R approximate to 0.88 m, a < 0.25 m) has produced a wide variety of plasma configurations, both diverted and limited, with elongations kappa(a), ranging from 0.9 to...

Beta limits in long-pulse tokamak discharges (1997)

Sauter, O., LaHaye, R. J., Chang, Z., Gates, D. A., Kamada, Y., Zohm, H., ...

The maximum normalized beta achieved in long-pulse tokamak discharges at low collisionality falls significantly below both that observed in short pulse discharges and that predicted by the ideal MHD...

Stable equilibria for bootstrap-current-driven low aspect ratio tokamaks (1997)

Miller, R. L., LinLiu, Y. R., Turnbull, A. D., Chan, V. S., Pearlstein, L. D., Sauter, O., ...

Low aspect ratio tokamaks (LATs) can potentially provide a high ratio of plasma pressure to magnetic pressure beta and high plasma current I at a modest size. This opens up the possibility of a...