W. Suttrop

Details der Publikationsliste

Zeitraum

1995 - 2009

Anzahl

537

Co-Autoren

L.Giannone, U.Stroth, J.K511ermeyer, M.Alexander, (2007)

V. Erckmann, H. J. Hartfuss, F. Ryter, W. Suttrop

Combined analysis of steady state and transient transport by the maximum entropy method

Plasma stability enhancement using EC-RH/CD in ASDEX upgrade. (2007)

Manini, A., Behler, K., Giannone, L., Hicks, N., Leuterer, F., Maraschek, M., ...

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

Impact of fast vertical and radial plasma movement on type-1 ELMs in ASDEX upgrade (2006)

Lang, P. T., Gruber, O., Mertens, V., Neu, R., Ryter, F., Schneider, W., ...

For the ITER project it is clear that steps have to be taken in order to avoid or mitigate type-I ELMs when operating in the standard H-mode scenario. Otherwise, divertor power loads induced by...

Overview of ASDEX Upgrade results-development of integrated operating scenarios for ITER (2005)

Günter,S., Angioni,C., Apostoliceanu,M., Atanasiu,C., Balden,M., Becker,G., ...

This article based on the 2004 Fusion Energy Conference contribution (Vilamoura, Portugal, 1-6 November 2004)

Overview of ASDEX Upgrade results-development of integrated operating scenarios for ITER (2005)

Günter, S., Angioni, C., Apostoliceanu, M., Atanasiu, C., Balden, M., Becker, G., ...

This article based on the 2004 Fusion Energy Conference contribution (Vilamoura, Portugal, 1-6 November 2004)

Studies of the 'Quiescent H-mode' regime in ASDEX Upgrade and JET (2005)

Suttrop, W., Hynonen, V., Kurki-Suonio, T., Lang, P. T., Maraschek, M., Neu, R., ...

The stationary edge localized mode (ELM)-free 'Quiescent H-mode' (QH-mode) regime, obtained with counter neutral beam injection, is studied in ASDEX Upgrade and Joint European Torus. QH-mode plasmas...

Integrated exhaust scenarios with actively controlled ELMs (2005)

Lang, P. T., Kallenbach, A., Bucalossi, J., Conway, G. D., Degeling, A., Dux, R., ...

An integrated radiative high performance scenario has been established at ASDEX Upgrade based on simultaneous feedback control of the average divertor neutral particle and power flux in combination...

Local 3D perturbation experiments for probing the ELM stability (2005)

Lang, P. T., Hobirk, J., Horton, L. D., Kallenbach, A., Maraschek, M., Mertens, V., ...

Empirical estimates indicate that the transient divertor power load induced by type-I ELMs in the standard H-mode ITER scenario might result in intolerably short target life times. Significant...

Edge localized modes control: experiment and theory (2005)

Becoulet, M., Huysmans, G., Thomas, P., Joffrin, E., Rimini, F., Monier-Garbet, P., ...

The paper reviews recent theoretical and experimental results focussing on the identification of the key factors controlling ELM energy and particle losses both in natural ELMs and in the presence of...

ELMy H-modes in JET helium-4 plasmas (2004)

McDonald, D. C., Cordey, E., Righi, F., Ryter, F., Saibene, G., Sartori, R., ...

This version is available at the following Publisher URL: http://stacks.iop.org/0741-3335/46/519

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

Autoregressive moving average model for analyzing edge localized mode time series on Axially Symmetric Divertor Experiment (ASDEX) Upgrade tokamak (2004)

Zvejnieks, G., Kuzovkov, V. N., Dumbrajs, O., Degeling, A. W., Suttrop, W., Urano, H., ...

An approach to analysis of time series of edge localized modes (ELMs) is proposed. It is based on the use of the autoregressive moving average model, which decomposes time series into deterministic...

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...

ELMy H-modes in JET helium-4 plasmas (2004)

McDonald, C., Cordey, J. G., Righi, E., Ryter, F., Saibene, G., Sartori, R., ...

ELMy H-modes in helium-4 plasmas provide valuable information on ELMy H-mode physics as well as a possible early low activation operational phase for next-step tokamaks, such as ITER. With this in...

Frequency control of type-I ELMs by magnetic triggering in ASDEX Upgrade (2004)

Lang, P. T., Degeling, A. W., Lister, J. B., Martin, Y. R., McCarthy, P. J., Sips, A. C. C., ...

Magnetic triggering of edge localized modes (ELMs) was reported first from TCV in ohmic plasmas showing type-III ELMs. This method, showing successful locking of the ELM frequency to an imposed...

ITER-relevant H-mode physics at ASDEX upgrade (2004)

Horton, L. D., Conway, G. D., Degeling, A. W., Eich, T., Kallenbach, A., Lang, P. T., ...

A variety of techniques are being tested on ASDEX Upgrade for avoiding or reducing the divertor energy load caused by ELMs. Quiescent H-mode operation has been improved by operation with recently...

Density Profile Evolution during Dynamic Processes in ASDEX Upgrade (2004)

I. Nunes, J. Santos, Francisco Salzedas, M. Manso, F. Serra, G. Conway, ...

The impact of ELM activity and density limit disruptions on the plasma density as well as the use of reflectometry for plasma position and shape control are discussed here. Fast density measurements...

Effects of temperature ratio on JET transport in hot ion and hot electron regimes (2004)

Weiland, J., Asp, E., Garbet, X., Mantica, P., Parail, V., Thomas, P., ...

31st EPS Conference on Controlled Fusion and Plasma Physics. London 28 June - 2 July 2004. European Conference Abstract Vol. 28G, P-1.160

Impurity-seeded plasma experiments on JET (2003)

Maddison,G. P., Brix,M., Budny,R., Charlet,M., Coffey,I., Cordey,J. G., ...

Scaling to larger tokamaks of high confinement plasmas with radiating edges, induced by impurities, is being studied through internationally collaborative experiments on JET. In campaigns till the...

ELM-free stationary H-mode plasmas in the ASDEX Upgrade tokamak (2003)

Suttrop,W., Maraschek,M., Conway,G. D., Haas,G., Horton,L. D., ...

ELM-free H-mode plasmas with stationary plasma density and radiation level are obtained in the ASDEX Upgrade tokamak with large clearance between the last closed flux surface and the wall, and...

Energy and particle losses during type-I ELMy H-mode in ASDEX Upgrade (2003)

Urano,H., Suttrop,W., Horton,L. D., Herrmann,A., Fuchs,J. C.

Characteristics of edge-localized mode (ELM) energy and particle losses in type-I ELMy H-mode plasmas on ASDEX Upgrade are investigated by a large data set with as much as possible independent...

Characterization of ion heat conduction in JET and ASDEX Upgrade plasmas with and without internal transport barriers (2003)

Wolf,R. C., Baranov,Y., Garbet,X., Hawkes,N., Peeters,A. G., Challis,C., ...

In ASDEX Upgrade and JET, the ion temperature profiles can be described by R/LTi which exhibits only little variations, both locally, when comparing different discharges, and radially over a wide...

H-mode and pedestal physics in ASDEX Upgrade (2003)

Suttrop,W., Herrmann,A., Ryter,F., Stober,J. K.

Studies in ASDEX Upgrade of the phenomenology and scaling of the H-mode transition, of edge-localized modes (ELMs), and characterization of the H-mode edge transport barrier carried out in various...

Recent ECRH results in ASDEX Upgrade (2003)

Leuterer,F., Dux,R., Gantenbein,G., Goddman,T., Hobirk,J., Imbeaux,F., ...

We report about experiments in ASDEX Upgrade using our ECRH system with f = 140 GHz, P = 4 x 0.5 MW, and T = 2 sec. The following topics are covered: studies of modulated power deposition, studies of...

High resolution edge density measurements in ASDEX Upgrade H-mode discharges with broadband reflectometry (2003)

Varela,P., Manso,M. E., Conway,G. D., Suttrop,W., Zohm,H.

In high-confinement (H-mode) plasmas with edge localized modes (ELMs), the energy stored at the edge pedestal region directly affects the global plasma confinement. The measurement of the edge...

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...

Tolerable ELMs in conventional and advanced scenarios at ASDEX Upgrade (2003)

Gruber,O., Günter,S., Herrmann,A., Horton,L. D., Lang,P. T., Maraschek,M., ...

Recent ASDEX Upgrade experiments integrated benign type II ELMs (tolerable peak heat loads on target plates) with high performance. In both conventional and advanced H-modes, the operation window...

The new ASDEX Upgrade real-time control and data acquisition system (2003)

Treutterer,W., Behler,K., Cole,R., Hobirk,J., Jakobi,M., Lohs,A., ...

ASDEX upgrade investigates the integration of confinement, stability and exhaust issues into an operating scenario for ITER and a future fusion reactor. Since commissioned in 1990 the systems used to...

Transient heat transport studies in JET conventional and advanced tokamak plasmas (2003)

Mantica,P., Coffey,I., Dux,R., Garbet,X., Garzotti,L., Gorini,G., ...

Transient transport studies have long been recognised as a valuable complement to steady-state analysis for the understanding of transport mechanisms. Recently, transient transport data have proved...

Edge localized mode physics and operational aspects in tokamaks (2003)

Bécoulet,M., Huysmans,G., Sarazin,Y., Garbet,X., Ghendrih,Ph., Rimini,F., ...

Recent progress in experimental and theoretical studies of edge localized mode (ELM) physics is reviewed for the reactor relevant plasma regimes, namely the high confinement regimes, that is, H-modes...

Electron heat transport in ASDEX Upgrade: experiment and modelling (2003)

Ryter,F., Tardini,G., De Luca,F., Imbeaux,F., Jacchia,A., ...

The electron heat transport is investigated in ASDEX Upgrade using electron cyclotron heating (ECH) combining steady-state and power modulation schemes. Experiments in which the electron heat flux...

Disruption studies in ASDEX Upgrade (2003)

Pautasso,G., Egorov,S., Finken,K. H., Gruber,O., Herrmann,A., Fuchs,C. J., ...

Disruption generate large thermal and mechanical stresses on the tokamak components. For a future reactor disruptions have a significant impact on the design since all loading conditions must be...

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...

Diagnosing Electron Heat Transport in ASDEX Upgrade with ECH Power Modulation (2003)

Ryter,F., Suttrop,W., Kirov,K. K., Leuterer,F., Peeters,A. G., ...

Diagnosing electron heat transport is achieved in ASDEX Upgrade using Electron Cyclotron Heating in experiments combining steady-state and power modulation. The flexible ECH system and the high...

Impurity-seeded plasma experiments on JET (2003)

Maddison, G. P., Brix, M., Budny, R., Charlet, M., Coffey, I., Cordey, J. G., ...

Scaling to larger tokamaks of high confinement plasmas with radiating edges, induced by impurities, is being studied through internationally collaborative experiments on JET. In campaigns till the...

ELM-free stationary H-mode plasmas in the ASDEX Upgrade tokamak (2003)

Suttrop, W., Maraschek, M., Conway, G. D., Haas, G., Horton, L. D., ...

ELM-free H-mode plasmas with stationary plasma density and radiation level are obtained in the ASDEX Upgrade tokamak with large clearance between the last closed flux surface and the wall, and...

Energy and particle losses during type-I ELMy H-mode in ASDEX Upgrade (2003)

Urano, H., Suttrop, W., Horton, L. D., Herrmann, A., Fuchs, J. C., ASDEX Upgrade Team

Characteristics of edge-localized mode (ELM) energy and particle losses in type-I ELMy H-mode plasmas on ASDEX Upgrade are investigated by a large data set with as much as possible independent...

Characterization of ion heat conduction in JET and ASDEX Upgrade plasmas with and without internal transport barriers (2003)

Wolf, R. C., Baranov, Y., Garbet, X., Hawkes, N., Peeters, A. G., Challis, C., ...

In ASDEX Upgrade and JET, the ion temperature profiles can be described by R/LTi which exhibits only little variations, both locally, when comparing different discharges, and radially over a wide...

H-mode and pedestal physics in ASDEX Upgrade (2003)

Suttrop, W., Herrmann, A., Ryter, F., Stober, J. K.

Studies in ASDEX Upgrade of the phenomenology and scaling of the H-mode transition, of edge-localized modes (ELMs), and characterization of the H-mode edge transport barrier carried out in various...

Recent ECRH results in ASDEX Upgrade (2003)

Leuterer, F., Dux, R., Gantenbein, G., Goddman, T., Hobirk, J., Imbeaux, F., ...

We report about experiments in ASDEX Upgrade using our ECRH system with f = 140 GHz, P = 4 x 0.5 MW, and T = 2 sec. The following topics are covered: studies of modulated power deposition, studies of...

High resolution edge density measurements in ASDEX Upgrade H-mode discharges with broadband reflectometry (2003)

Varela, P., Manso, M. E., Conway, G. D., Suttrop, W., Zohm, H., ASDEX Upgrade Team

In high-confinement (H-mode) plasmas with edge localized modes (ELMs), the energy stored at the edge pedestal region directly affects the global plasma confinement. The measurement of the edge...

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...

Tolerable ELMs in conventional and advanced scenarios at ASDEX Upgrade (2003)

Gruber, O., Günter, S., Herrmann, A., Horton, L. D., Lang, P. T., Maraschek, M., ...

Recent ASDEX Upgrade experiments integrated benign type II ELMs (tolerable peak heat loads on target plates) with high performance. In both conventional and advanced H-modes, the operation window...

The new ASDEX Upgrade real-time control and data acquisition system (2003)

Treutterer, W., Behler, K., Cole, R., Hobirk, J., Jakobi, M., Lohs, A., ...

ASDEX upgrade investigates the integration of confinement, stability and exhaust issues into an operating scenario for ITER and a future fusion reactor. Since commissioned in 1990 the systems used to...

Transient heat transport studies in JET conventional and advanced tokamak plasmas (2003)

Mantica, P., Coffey, I., Dux, R., Garbet, X., Garzotti, L., Gorini, G., ...

Transient transport studies have long been recognised as a valuable complement to steady-state analysis for the understanding of transport mechanisms. Recently, transient transport data have proved...

Edge localized mode physics and operational aspects in tokamaks (2003)

Bécoulet, M., Huysmans, G., Sarazin, Y., Garbet, X., Ghendrih, Ph., Rimini, F., ...

Recent progress in experimental and theoretical studies of edge localized mode (ELM) physics is reviewed for the reactor relevant plasma regimes, namely the high confinement regimes, that is, H-modes...

Electron heat transport in ASDEX Upgrade: experiment and modelling (2003)

Ryter, F., Tardini, G., De Luca, F., Imbeaux, F., Jacchia, A., ...

The electron heat transport is investigated in ASDEX Upgrade using electron cyclotron heating (ECH) combining steady-state and power modulation schemes. Experiments in which the electron heat flux...

Disruption studies in ASDEX Upgrade (2003)

Pautasso, G., Egorov, S., Finken, K. H., Gruber, O., Herrmann, A., Fuchs, C. J., ...

Disruption generate large thermal and mechanical stresses on the tokamak components. For a future reactor disruptions have a significant impact on the design since all loading conditions must be...

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...

Diagnosing Electron Heat Transport in ASDEX Upgrade with ECH Power Modulation (2003)

Ryter, F., Suttrop, W., Kirov, K. K., Leuterer, F., Peeters, A. G., ...

Diagnosing electron heat transport is achieved in ASDEX Upgrade using Electron Cyclotron Heating in experiments combining steady-state and power modulation. The flexible ECH system and the high...

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...

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...

ECRH power deposition studies in ASDEX Upgrade (2002)

Kirov,K. K., Leuterer,F., Pereverzev,G. V., Ryter,F., Suttrop,W.

In this paper the calculated ECRH power deposition profiles pECRH(rho) are compared with the experimentally derived ones in ASDEX Upgrade. ECRH power deposition is calculated by the beamtracing code...

Confinement physics of the advanced scenario with ELMy H-mode edge in ASDEX Upgrade (2002)

Peeters,A. G., Gruber,O., Günter,S., Kaufmann,M., Meister,H., Pereverzev,G. V., ...

The confinement physics of the improved H-mode is analysed in detail. It is shown that this scenario can be largely unified with that of the standard H-mode. Transport barriers exist in the early...

Steady state advanced scenarios at ASDEX Upgrade (2002)

Sips,A.C.C., Arslanbekov,R., Atanasiu,C., Becker,W., Becker,G., Behler,K., ...

Recent experiments at ASDEX Upgrade have achieved advanced scenarios with high beta(N) (> 3) and confinement enhancement over ITER98(y, 2) scaling, H-H98y2 = 1.1-1.5, in steady state. These...

Scaling of the pedestal density in type-I ELMy H-mode discharges and the impact of upper and lower triangularity in JET and ASDEX Upgrade (2002)

Kallenbach,A., Beurskens,M. N. A., Korotkov,A., Lomas,P., Suttrop,W., Charlet,M., ...

Experiments have been performed to disentangle the individual role of tipper and lower triangularity on density buildup of lower single null, type-I ELMy H-mode discharges in JET. Comparison with...

Energy confinement in steady-state ELMy H-modes in JET (2002)

Cordey,J. G., McDonald,D. C., Borrass,K., Charlet,M., Coffey,I., Kallenbach,A., ...

It is shown statistically that, divertor closure, plasma shaping and density peaking improve the energy confinement of ELMy H-modes, whilst the confinement degrades as the Greenwald density limit is...

Confinement properties of high density impurity seeded ELMy H- mode discharges at low and high triangularity on JET (2002)

Dumortier,P., Andrew,P., Bonheure,G., Budny,R. V., Buttery,R., Charlet,M., ...

The design value for ITER is based on operation at n/n(GW) = 0.85, beta(n) = 1.8 and H98(y, 2) = 1. These values have been routinely achieved in JET in argon seeded ELMy H-mode discharges in...

High density operation at JET by pellet refuelling (2002)

Lang,P. T., Alper,B., Baylor,L. R., Beurskens,M., Cordey,J. G., Dux,R., ...

Several approaches are used at JET to achieve operation at high density with good energy confinement. One of them is the injection of solid fuel pellets to realize efficient particle refuelling by...

Incomplete reconnection in sawtooth crashes in ASDEX Upgrade (2002)

Letsch,A., Zohm,H., Ryter,F., Suttrop,W., Gude,A., Porcelli,F., ...

The temporal evolution of the sawtooth crash in ASDEX Upgrade Ohmic and ECRH heated discharges is analysed using a heuristic reconnection model to simulate measured ECE signals. The method turns out...

Characteristics and scaling of energy and particle losses during Type I ELMs in JET H-modes (2002)

Loarte,A., Becoulet,M., Saibene,G., Sartori,R., Campbell,D. J., Eich,T., ...

Recent experiments on the Type I ELMy H-mode regime performed at JET with improved diagnostics have expanded the range of parameters for the study of Type I ELM energy and particle losses. Deviations...

Improved performance of ELMy H-modes at high density by plasma shaping in JET (2002)

Saibene,G., Sartori,R., Loarte,A., Campbell,D. J., Lomas,P. J., Parail,V., ...

We present the results of experiments in JET to study the effect of plasma shape on high density ELMy H-modes, with geometry of the magnetic boundary similar to that envisaged,for the standard,Q = 10...

Edge operational space for high density/high confinement ELMY H-modes in JET (2002)

Sartori,R., Saibene,G., Becoulet,M., Lomas,P. J., Loarte,A., Campbell,D. J., ...

This paper discusses how the proximity to the L-H threshold affects the confinement of ELMy H-modes at high density. The largest reduction in confinement at high density is observed at the transition...

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...

Impurity behaviour in the ASDEX Upgrade divertor tokamak with large area tungsten walls (2002)

Neu,R., Dux,R., Geier,A., Kallenbach,A., Pugno,R., Rohde,V., ...

At the central column of ASDEX Upgrade, an area of 5.5 m(2) of graphite tiles was replaced by tungsten-coated tiles representing about two-thirds of the total area of the central column. No negative...

Transport into and across the scrape-off layer in the ASDEX Upgrade divertor tokamak (2002)

Neuhauser,J., Coster,D., Fahrbach,H. U., Fuchs,J. C., Haas,G., Herrmann,A., ...

The elements of transport into and across the scrape-off layer in the poloidal divertor tokamak ASDEX Upgrade are analysed for different operational regimes with emphasis on enhanced confinement...

Fast economical data acquisition systems based on the CERN S- LINK interface standard (2002)

Suttrop,W., Behler,K., Van Der Bij,H. C., Klenge,S.

Fast data acquisition with direct transfer to memory is facilitated by the S-LINK interface protocol, developed at CERN, the European Organization for Nuclear Research. The need for customized...

Remote participation at JET Task Force work: users experience (2002)

Suttrop,W., Kinna,D., Farthing,J., Hemming,O., How,J., Schmidt,V., ...

The Joint European Torus (JET) fusion experiment is now operated with strong involvement of physicists from outside research laboratories, which often requires remote participation in JET physics...

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...

Optimization of pellet scenarios for long pulse fuelling to high densities at JET (2002)

Lang,P. T., Alper,B., Baylor,L. R., Beurskens,M., Cordey,J. G., Dux,R., ...

Pellet injection was investigated for its fuelling capability to high densities in ELMy H mode discharges at JET. Applying the high field side launch system, optimized refuelling scenarios were...

Energy confinement in steady-state ELMy H-modes in JET (2002)

Cordey, J. G., McDonald, D. C., Borrass, K., Charlet, M., Coffey, I., Kallenbach, A., ...

It is shown statistically that, divertor closure, plasma shaping and density peaking improve the energy confinement of ELMy H-modes, whilst the confinement degrades as the Greenwald density limit is...

Confinement properties of high density impurity seeded ELMy H- mode discharges at low and high triangularity on JET (2002)

Dumortier, P., Andrew, P., Bonheure, G., Budny, R. V., Buttery, R., Charlet, M., ...

The design value for ITER is based on operation at n/n(GW) = 0.85, beta(n) = 1.8 and H98(y, 2) = 1. These values have been routinely achieved in JET in argon seeded ELMy H-mode discharges in...

Scaling of the pedestal density in type-I ELMy H-mode discharges and the impact of upper and lower triangularity in JET and ASDEX Upgrade (2002)

Kallenbach, A., Beurskens, M.N.A., Korotkov, A., Lomas, P., Suttrop, W., Charlet, M., ...

Experiments have been performed to disentangle the individual role of tipper and lower triangularity on density buildup of lower single null, type-I ELMy H-mode discharges in JET. Comparison with...

ECRH power deposition studies in ASDEX Upgrade (2002)

Kirov, K. K., Leuterer, F., Pereverzev, G. V., Ryter, F., Suttrop, W.

In this paper the calculated ECRH power deposition profiles pECRH(rho) are compared with the experimentally derived ones in ASDEX Upgrade. ECRH power deposition is calculated by the beamtracing code...

Optimization of pellet scenarios for long pulse fuelling to high densities at JET (2002)

Lang, P. T., Alper, B., Baylor, L. R., Beurskens, M., Cordey, J. G., Dux, R., ...

Pellet injection was investigated for its fuelling capability to high densities in ELMy H mode discharges at JET. Applying the high field side launch system, optimized refuelling scenarios were...

High density operation at JET by pellet refuelling (2002)

Lang, P. T., Alper, B., Baylor, L. R., Beurskens, M., Cordey, J. G., Dux, R., ...

Several approaches are used at JET to achieve operation at high density with good energy confinement. One of them is the injection of solid fuel pellets to realize efficient particle refuelling by...

Incomplete reconnection in sawtooth crashes in ASDEX Upgrade (2002)

Letsch, A., Zohm, H., Ryter, F., Suttrop, W., Gude, A., Porcelli, F., ...

The temporal evolution of the sawtooth crash in ASDEX Upgrade Ohmic and ECRH heated discharges is analysed using a heuristic reconnection model to simulate measured ECE signals. The method turns out...

Characteristics and scaling of energy and particle losses during Type I ELMs in JET H-modes (2002)

Loarte, A., Becoulet, M., Saibene, G., Sartori, R., Campbell, D. J., Eich, T., ...

Recent experiments on the Type I ELMy H-mode regime performed at JET with improved diagnostics have expanded the range of parameters for the study of Type I ELM energy and particle losses. Deviations...

Impurity behaviour in the ASDEX Upgrade divertor tokamak with large area tungsten walls (2002)

Neu, R., Dux, R., Geier, A., Kallenbach, A., Pugno, R., Rohde, V., ...

At the central column of ASDEX Upgrade, an area of 5.5 m(2) of graphite tiles was replaced by tungsten-coated tiles representing about two-thirds of the total area of the central column. No negative...

Transport into and across the scrape-off layer in the ASDEX Upgrade divertor tokamak (2002)

Neuhauser, J., Coster, D., Fahrbach, H. U., Fuchs, J. C., Haas, G., Herrmann, A., ...

The elements of transport into and across the scrape-off layer in the poloidal divertor tokamak ASDEX Upgrade are analysed for different operational regimes with emphasis on enhanced confinement...

Confinement physics of the advanced scenario with ELMy H-mode edge in ASDEX Upgrade (2002)

Peeters, A. G., Gruber, O., Günter, S., Kaufmann, M., Meister, H., Pereverzev, G. V., ...

The confinement physics of the improved H-mode is analysed in detail. It is shown that this scenario can be largely unified with that of the standard H-mode. Transport barriers exist in the early...

Improved performance of ELMy H-modes at high density by plasma shaping in JET (2002)

Saibene, G., Sartori, R., Loarte, A., Campbell, D. J., Lomas, P. J., Parail, V., ...

We present the results of experiments in JET to study the effect of plasma shape on high density ELMy H-modes, with geometry of the magnetic boundary similar to that envisaged,for the standard,Q = 10...

Edge operational space for high density/high confinement ELMY H-modes in JET (2002)

Sartori, R., Saibene, G., Becoulet, M., Lomas, P. J., Loarte, A., Campbell, D. J., ...

This paper discusses how the proximity to the L-H threshold affects the confinement of ELMy H-modes at high density. The largest reduction in confinement at high density is observed at the transition...

Steady state advanced scenarios at ASDEX Upgrade (2002)

Sips, A.C.C., Arslanbekov, R., Atanasiu, C., Becker, W., Becker, G., Behler, K., ...

Recent experiments at ASDEX Upgrade have achieved advanced scenarios with high beta(N) (> 3) and confinement enhancement over ITER98(y, 2) scaling, H-H98y2 = 1.1-1.5, in steady state. These...

Fast economical data acquisition systems based on the CERN S- LINK interface standard (2002)

Suttrop, W., Behler, K., Van Der Bij, H. C., Klenge, S.

Fast data acquisition with direct transfer to memory is facilitated by the S-LINK interface protocol, developed at CERN, the European Organization for Nuclear Research. The need for customized...

Remote participation at JET Task Force work: users experience (2002)

Suttrop, W., Kinna, D., Farthing, J., Hemming, O., How, J., Schmidt, V., ...

The Joint European Torus (JET) fusion experiment is now operated with strong involvement of physicists from outside research laboratories, which often requires remote participation in JET physics...

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...

Optimization of pellet scenarios for long pulse fuelling to high densities at JET (2002)

Lang, P. R., Alper, B., Baylor, L. R., Beurskens, M., Cordey, J. G., Dux, R., ...

This version is available at the following URL: http://dx.doi.org/10.1088/0029-5515/42/4/303

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

Energy confinement in steady state ELMyH-modes in JET (2002)

Cordey, J. G., McDonald, D. C., Borrass, K., Charlet, M., Coffey, I. H., Kallenbach, A., ...

This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/44/9/311

High density operation at JET by pellet refueling (2002)

Lang, P. R., Alper, B., Baylor, L. R., Beurskens, M., Cordey, J. G., Dux, R., ...

This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/44/9/310

Improved performance of ELMy H-modes at high density by plasma shaping in JET (2002)

Saibene, G., Sartori, R., Loarte, A., Campbell, I. D., Lomas, P. J., Parail, V., ...

This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/44/9/301

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...

Incomplete reconnection in sawtooth crashes in ASDEX Upgrade (2002)

Letsch, A., Zohm, H., Ryter, F., Suttrop, W., Gude, A., Poreelli, F., ...

The temporal evolution of the sawtooth crash in ASDEX Upgrade Ohmic and ECRH heated discharges is analysed using a heuristic reconnection model to simulate measured ECE signals. The method turns out...

Observations of the Onset of the Energy Quench in ASDEX Upgrade Density Limit Disruptions (2002)

Francisco Salzedas, G. Pautasso, I. Nunes, W. Suttrop, M. Maraschek, M. E. Manso, ...

Tokamak major density limit disruptions are usually preceded by a m/n=2/1 tearing mode, that may or may not lock to the vessel wall. The complete destruction of energy confinement in these major...

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

Experimental studies of electron transport (2001)

Ryter, F., Angioni, C., Beurskens, M., Cirant, S., Hoang, G. T., Hogeweij, G. M. D., ...

This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/43/12A/325

Experimental studies of electron transport (2001)

Ryter, F., Angioni, C., Beurskens, M., Cirant, S., Hoang, G. T., Hogeweij, G. M. D., ...

Electron transport in tokamaks has many different features which are briefly reviewed. The paper is focused on electron heat transport in conventional tokamak plasmas. An inter-machine comparison...

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...

Understanding of H mode pedestal characteristics using the multimachine pedestal database (2001)

Hatae, T., Sugihara, M., Hubbard, A. E., Igitkhanov, Y., Kamada, Y., Janeschitz, G., ...

With use of a multimachine pedestal database, essential issues for each regime of ELM types are investigated. They include (i) understanding and prediction of pedestal pressure during type I ELMs, a...

Predictive modelling of JET plasmas with edge and core transport barriers (2001)

Parail, V., Baranov, Y., Becoulet, A., Castaldo, C., Corriga, G., Challis, C., ...

Proceedings of the 28th EPS Conference on 28th EPS Conference on Controlled Fusion and Plasma Physics. Funchal, Madeira, PT, 18 - 22 June 2001. Europhysics Conference Abstracts, Contributed Papers...

Effects of type-I edge-localized modes on transport in ASDEX upgrade (1998)

Suttrop, W., Gehre, O., Fuchs, J. C., Reimerdes, H., Schneider, W., Schweinzer, J.

Particle and energy losses due to type-I edge-localized modes (ELMs) and the effect of H-mode pedestal parameters on global confinement are studied for H-Mode discharges in ASDEX Upgrade. ELM...

Toroidally asymmetric ELM precursors in TCV (1998)

Reimerdes, H., Pochelon, A., Suttrop, W.

Coherent magnetic oscillations precede edge localized modes (ELMs) in TCV. The precursor has been detected prior to ELMs considered to be of type III and others previously referred to as TCV large:...

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...