Poloidal polarimeter system for current density measurements in ITER (2000)
Donne, A. J. H., Edlington, T., Joffrin, E., Koslowski, H. R., Nieswand, C., Segre, S., ...
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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...
Vertical position control in TCV: Comparison of model predictions with experimental results (2000)
Hofmann, F., Favre, A., Isoz, P. F., Martin, Y., Moret, J. M., Nieswand, C.
Growth rates of the axisymmetric instability of elongated plasmas in TCV are measured, in open loop configuration, for a wide variety of plasma shapes with elongations and triangularities in the...
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...
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,...
Poloidal polarimeter system for current density measurements in ITER (1999)
Donne, A. J. H., Edlington, T., Joffrin, E., Koslowski, H. R., Nieswand, C., Segre, S. E., ...
The polarimeter system for ITER features 10 viewing chords covering almost the full poloidal cross section of the plasma in a fan-like arrangement. The 10 laser beams all enter the plasma via 150 mm...
Preliminary confinement studies during ECRH in TCV (1998)
Pochelon, A., Pietrzyk, Z.A., Goodman, T.P., Henderson, M.A., Reimerdes, H., M.Q., Tran, ...
Analysis of phase measurements in combined interferometer and polarimeter systems (1998)
Rommers, J. H., Barry, S., Behn, R., Nieswand, C.
Combined interferometer and polarimeter systems, using a single detecting element per line of sight, are susceptible to perturbation of the interferometric phase when modulation of the polarization...
Stability and energy confinement of highly elongated plasmas in TCV (1997)
Hofmann, F., Behn, R., Dutch, M.J., Martin, Y., Moret, J.M., Nieswand, C., ...
Observation of improved ohmic confinement in highly elongated TCV discharges (1997)
Nieswand, C., Hofmann, F., Behn, R., Furno, I., Moret, J.M., Pietrzyk, Z.A., ...
Effect of plasma shape on confinement and MHD behaviour in the TCV tokamak (1997)
Weisen, H., Moret, J. M., Franke, S., Furno, I., Martin, Y., Anton, M., ...
The energy confinement time of TCV ohmic L mode discharges depends strongly on plasma shape. For fixed average current and electron densities, confinement times increase with plasma elongation and...
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...
Divertor target profiles and recycling studies in TCV single null lower standard discharges (1997)
Pitts, R. A., Nieswand, C., Weisen, H., Anton, M., Behn, R., Chavan, R. F., ...
A 'standard', single null lower diverted discharge has been developed to enable continuous monitoring of the first wall conditions and to characterise the effectiveness and influence of wall...
Influence of plasma shape on transport in the TCV Tokamak (1997)
Moret, J. M., Franke, S., Weisen, H., Anton, M., Behn, R., Duval, B. P., ...
The energy confinement time of TCV Ohmic, L-mode discharges is observed to depend strongly on the plasma shape, improving slightly with elongation and degrading strongly as triangularity is increased...
Bench test results on a new technique for far-infrared polarimetry (1997)
Barry, S., Nieswand, C., Prunty, S. L., Mansfield, H. M., Oleary, P.
The results of bench tests performed on a new method of combined interferometry/polarimetry for the magnetic-field reconstruction of tokamak plasmas is presented. In particular, the sensitivity...
Effect of plasma shape on confinement and MHD behaviour in the TCV tokamak (1997)
Weisen, H., Franke, S., Furno, I., Martin, Y., Anton, M., ...
Effect of plasma shaping on confinement and MHD behaviour in TCV (1996)
Nieswand, C., Behn, R., Buehlmann, F., Dutch, M.J., Duval, B.P., Franke, S., ...
Ohmic H-modes in the TCV tokamak (1996)
Weisen, H., Hofmann, F., Dutch, M. J., Martin, Y., Pochelon, A., Moret, J. M., ...
The TCV tokamak has obtained ohmic H-modes in virtually all diverted plasmas with the ion del B drift directed towards an X-point and in several elongated limiter plasmas. Troyon factors...
Effect on confinement of edge-localized modes in TCV (1996)
Weisen, H., Dutch, M. J., Hofmann, F., Martin, Y., Moret, J. M., Nieswand, C., ...
The effect of ELMs on confinement in ohmic H-modes has been investigated by analysing the rates of change of global parameters such as the electron content and the stored energy as a function of ELM...
Barry, S., Nieswand, C., Buhlmann, F., Prunty, S. L., Mansfield, H. M.
On many tokamaks the reconstruction of the magnetic field structure in the plasma is supported by polarimetric measurements. Recent proposed and realized methods are based on a far-infrared laser...
Bench test results on a new technique for Far-Infrared polarimetry (1996)
Barry, S., Nieswand, C., Prunty, S.L., Mansfield, H.M., O'Leary, P.
Influence of plasma shape on Transport in the TCV Tokamak (1996)
Franke, S., Weisen, H., Anton, M., Behn, R., Duval, B.P., ...
Recent results from TCV (Invited Paper) (1995)
Llobet, X., Marletaz, B., Marmillod, Ph., Martin, Y., Nieswand, C., Paris, P.J., ...
Recent Results from the Tcv Tokamak (1995)
Weisen, H., Hoffmann, F., Dutch, M. J., Moret, J. M., Lister, J. B., Pochelon, A., ...
During the first two years of operation, the TCV tokamak has produced a large variety of plasma shapes and magnetic configurations, with 1.0 less than or equal to B-tor less than or equal to 1.46T,...
Far-Infrared Wave Generation by Frequency Tripling (1995)
Siegrist, M. R., Keilmann, F., Nieswand, C., Urban, M.
In future fusion-oriented plasma devices alpha-particle diagnostics will be of great importance. It is generally recognized that collective Thomson scattering techniques show great potential in this...
Ohmic H-mode and confinement in TCV (1995)
Moret, J. M., Anton, M., Barry, S., Behn, R., Besson, G., Buhlmann, F., ...
The unique flexibility of TCV for the creation of a wide variety of plasma shapes has been exploited to address some aspects of tokamak physics for which the shape may play an important role. The...
Elm Control During Double-Null Ohmic H Modes in Tcv (1995)
Dutch, M. J., Hofmann, F., Duval, B. P., Corboz, M., Hirt, A., Joye, B., ...
Precise control of the shape and position of double-null divertor configurations in the TCV tokamak has been used to trigger reliably the transition from ELM-free to ELMy ohmic H mode and back....
Initial ohmic confinement results from TCV (1994)
Hofmann, F., Lister, J.B., Behn, R., Dutch, M.J., Duval, B.P., Joye, B., ...
Initial ohmic confinement results from TCV (1994)
Hofmann, F., Lister, J.B., Behn, R., Dutch, M.J., Duval, B.P., Joye, B., ...
Studies of the density limit of elongated plasmas in TCV using a FIR interferometer (1994)
Nieswand, C., Behn, R., Buehlmann, F., Hofmann, F., Martin, Y.
Creation and Control of Variably Shaped Plasmas in Tcv (1994)
Hofmann, F., Lister, J. B., Anton, M., Barry, S., Behn, R., Bernel, S., ...
During the first year of operation, the TCV tokamak has produced a large variety of plasma shapes and magnetic configurations, with 1.0 less than or equal to B(tor)less than or equal to 1.46T, I-p...
A New Pulsed Fir Laser Line in Ch3f (1993)
Nieswand, C., Siegrist, M. R., Urban, M.
A new laser line of CH3F at 676 mum has been found. The gas was pumped by a powerful pulsed CO2 laser at 9P20. The line could be observed simultaneously with the 496 mum line and can be assigned to a...
Density Limits and Disruptions in the Tca Tokamak (1992)
Pietrzyk, Z. A., Pochelon, A., Behn, R., Bondeson, A., Duperrex, P. A., Duval, B. P., ...
Density limit disruptions have been studied during the current flat-top of TCA. Disruption occurs at two different densities, depending on discharge programming. The highest densities are achieved by...
Measurement of ion temperature profiles in the TCA Tokamak by collective Thomson scattering (1991)
Nieswand, C., Behn, R., Siegrist, M.R., Dutch, M., Duval, B., Pietrzyk, A., ...
Density limit studies in the TCA Tokamak (1991)
Pietrzyk, Z.A., Behn, R., Bondeson, A., Duval, B., Joye, B., ...
Ion temperature measurements in the TCA tokamak by collective Thomson scattering (1991)
Siegrist, M.R., Behn, R., Nieswand, C., Dicken, D., Dutch, M., Duval, B.P., ...
Ion Temperature-Measurements in a Tokamak by Collective Thomson Scattering (1991)
Siegrist, M. R., Behn, R., Dicken, D., Duval, B. P., Hackmann, J., Joye, B., ...
Collective Thomson scattering, using a high-power pulsed D2O laser at 385-mu-m and a heterodyne receiver system, has provided local ion temperature (T(i)) measurements of the plasma in the tokamak...
New Cascade Laser Transitions in Ch2f2 Pumped with the 9r32 Line of a Cw Co2-Laser (1991)
New cascade laser transitions of (CH2F2)C-12 at 172.50-mu-m, 208.83-mu-m, 220.44-mu-m, 223.99-mu-m and 250.61-mu-m are reported. A waveguide FIR laser was pumped with a quasi cw (CO2)-C-12-O-16 laser...
Density limit disruption studies in the TCA tokamak (1991)
Pietrzyk, Z.A., Pochelon, A., Behn, R., Bondeson, A., Duval, B.P., ...
Ion temperature measurements in TCA by collective Thomson scattering (1990)
Nieswand, C., Behn, R., Dicken, D., Hackmann, J., Siegrist, M.R.