Resonant Excitation of Shear Alfv\'en Perturbations by Trapped Energetic Ions in a Tokamak (2009)
Abel, I. G., Breizman, B. N., Sharapov, S. E., Contributors, JET-EFDA
A new analytic expression is derived for the resonant drive of high n Alfvenic modes by particles accelerated to high energy by Ion Cyclotron Resonance Heating. This derivation includes finite orbit...
A wavelet-based method to measure the toroidal mode number of ELMs (2009)
Poli, F. M. (Francesca), Sharapov, S. E. (Sergei E.)
The high confinement mode regime (H-mode) in tokamaks is accompanied by the occurrence of burst of MHD activity at the plasma edge, so-called edge localized modes (ELMs). Because of the short time...
Recent progress in fast ion studies on JET (2009)
Kiptily, V. G., Perez Von Thun, C. P., Pinches, S. D., Sharapov, S. E., Borba, D., Cecil, F. E., ...
Overview of physics results from MAST (2009)
Meyer, H., Akers, R. J., Alladio, F., Appel, L. C., Axon, K. B., Ben Ayed, N., ...
Comparison between spontaneous ELMs and pellet-triggered events in JET (2009)
Poli, F. M., Lang, P. T., Sharapov, S. E., Alper, B., Koslowski, H. R., JET-EFDA Contributors
Pellet Investigations Related to ITER ELM Pacing and Particle Fuelling (2008)
Lang, P. T., Alper, B., Belonohy, E., Frigione, D., Gal, K., Kocsis, G., ...
Fast ion JET diagnostics: confinement and losses (2008)
Kiptily, G., Borba, D., Cecil, F. E., Cecconello, M., Darrow, D., Golobrod'ko, V., ...
Pellet investigations related to ITER ELM pacing and particle fuelling (2008)
Lang, P. T., Alper, B., Belonohy, E., Frigione, D., Kocsis, G., Lackner, K., ...
Localized X-mode reflectometry measurements of Alfven eigenmodes on the JET tokamak (2007)
Hacquin, S., Sharapov, S. E., Alper, B., Challis, C. D., Fonseca, A., Mazzucato, E., ...
Modeling sawtooth stabilization by energetic ions from neutral beam injection (2007)
Chapman, I. T., Pinches, S. D., Appel, L. C., Hastie, R. J., Hender, T. C., Saarelma, S., ...
Recent advances in modeling the effects of anisotropic energetic ion distributions have enabled the development of a complete coherent physics explanation of sawtooth stabilization in both...
Modification of sawtooth oscillations with ICRF waves in the JET tokamak (2007)
Mantsinen, M. J., Alper, B., Angioni, C., Buttery, R., Coda, S., Eriksson, L. G., ...
Prospects for steady-state scenarios on JET (2007)
Litaudon, X., Bizarro, J.P.S., Challis, C.D., Crisanti, F., De Vries, P.C., Lomas, P., ...
Nuclear Fusion Vol.47 Nr.9, 1285 - 1292
Observation and modelling of fast ion loss in JET and ASDEX Upgrade (2006)
Pinches, S.D., Kiptily, V.G., Sharapov, S.E., Darrow, D.S., ...
Alfven cascades in JET discharges with NBI-heating (2006)
Sharapov, S.E., Alper, B., Baranov, Y.F., Berk, H.L., Borba, D., Boswell, C., ...
Explanation of the JET n=0 chirping mode (2006)
Berk, H.L., Boswell, C.J., Borba, D., Figueiredo, A.C.A., Johnson, T., Nave, M.F.F., ...
Energetic Ion-driven instabilities on JET and on MAST (2006)
Sharapov, S.E., Alper, B., Kiptily, V.G., Hacquin, S., Schlatter, Ch.
Off-Axis NBI fast ion dynamics in Trace Tritium Experiment (2005)
Jenkins, I., Challis, C. D., Hobirk, J., Baranov, Yu. F., Bertalot, L., Keeling, D. L., ...
Frequency splitting in JET: theory and observation (2005)
Vann, R. G. L., Dendy, R. O., Pinches, S. D., Sharapov, S. E., JET-EFDA Contributors
Observation and Explanation of the JET n = 0 Chirping Mode (2005)
Boswell, C., Berk, H.L., Borba, D., Johnson, T., Nave, M.F.F., Pinches, S.D., ...
Observation of energetic particle driven modes relevant to advanced tokamak regimes (2005)
Nazikian, R., Alper, B., Berk, H. L., Borba, D., Boswell, C., Budny, R. V., ...
Theoretical Studies of Alfvén Wave-Energetic Particle Interactions (2005)
Berk, H. L., Breizman, B. N., Chen, L., Eremin, D. E., Fu, G., Gorelenkov, N., ...
Stork, D., Baranov, Y., Belo, P., Bertalot, L., Borba, D., Brzozowski, J. H., ...
Results are presented from the JET Trace Tritium Experimental (TTE) campaign using minority tritium (T) plasmas (n(T)/n(D) < 3%). Thermal tritium particle transport coefficients (D-T, nu(T)) are...
Experimental studies of instabilities and confinement of energetic particles on JET and MAST (2005)
Sharapov, S. E., Alper, B., Andersson, F., Baranov, Y. F., Berk, H. L., Bertalot, L., ...
In preparation for next step burning plasma devices such as ITER, experimental studies of instabilities and confinement of energetic ions were performed on Joint European Torus (JET) and on...
Spectroscopic determination of the internal amplitude of frequency sweeping TAE (2004)
Pinches, S. D., Berk, H. L., Gryaznevich, M. P., Sharapov, S. E., JET-EFDA Contributors
The role of energetic particles in fusion plasmas (2004)
Pinches, S. D., Berk, H. L., Borba, D. N., Breizman, B. N., Briguglio, S., Fasoli, A., ...
Determination of internal fields from frequency sweeping observation (2004)
Berk, H. L., Eremin, D. E., Gryaznevich, M., Pinches, S. D., Sharapov, S. E.
Monitoring Alfvén cascades with interferometry on the JET tokamak (2004)
Sharapov, S. E., Alper, B., Fessey, J., Hawkes, N. C., Young, N. P., Nazikian, R., ...
Monitoring Alfvén Cascades with Interferometry on the JET Tokamak (2004)
Sharapov, S. E., Alper, B., Fessey, J., Hawkes, N., Young, N., Nazikian, R., ...
This version is available at the following Publisher URL: http://prl.aps.org
Monitoring Alfven cascades with interferometry on the JET Tokamak (2004)
Sharapov, S. E., Alper, B., Fessey, J., Hawkes, N. C., Young, N. P., Nazikian, R., ...
A microwave interferometry technique is applied for the first time for detecting a discrete spectrum of Alfven cascade (AC) eigenmodes excited with fast ions in reversed magnetic shear plasmas of the...
The role of energetic particles in fusion plasmas (2004)
Pinches, S. D., Berk, H. L., Borba, D. N., Breizman, B. N., Briguglio, S., Fasoli, A., ...
In the burning fusion plasmas of next step devices such as ITER (2001 ITER-FEAT Outline Design Report IAEA/ITER EDA/DS/ 18 (Vienna: IAEA) p 2 1), the majority of the heating of the fusing fuel will...
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...
Internal transport barrier triggering by rational magnetic flux surfaces in tokamaks (2003)
Joffrin, E., Challis, C. D., Conway, G. D., Garbet, X., Gude, A., Günter, S., ...
The formation of internal transport barriers (ITBs) has been experimentally associated with the presence of rational q surfaces in both JET and ASDEX Upgrade. The triggering mechanisms are related to...
Alfvén Eigenmodes in shear reversed plasmas (2003)
Breizman, B. N., Berk, H. L., Pekker, M. S., Sharapov, S. E., Hawkes, N. C., Borba, D. N., ...
Experiments on JT-60U and JET have shown that plasma configurations with shear reversal are prone to the excitation of unusual Alfvén eigenmodes by energetic particles. These modes emerge outside...
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...
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...
MHD in JET Advanced Scenarios (2003)
Pinches, S.D., Alper, B., Buttery, R.J., Challis, C.D., Gryaznevich, M., Günter, S., ...
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...
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...
Modelling of Alfven waves in JET plasmas with the CASTOR-K code (2002)
Borba, D., Berk, H. L., Breizman, B. N., Fasoli, A., Nabais, F., Pinches, S. D., ...
A hybrid magnetohydrodynamic (M H D)-gyro-kinetic model CASTOR- K developed for the study of Alfven eigenmode (AE) stability in the presence of energetic ions has been applied to the interpretation...
Electron heated internal transport barriers in JET (2002)
Hogeweij, G. M. D., Baranov, Y., Conway, G. D., Cortes, S. R., De Baar, M. R., Hawkes, N., ...
By applying lower hybrid current drive (LHCD) for strong electron heating and off-axis current drive starting very early in the discharge, an electron internal transport barrier (eITB) can be...
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...
Westerhof, E., Sauter, O., Mayoral, I. C., Howell, D. F., Mantsinen, M. J., Nave, M. F. F., ...
This version is available at the following URL: http://dx.doi.org/10.1088/0029-5515/42/11/306
Mantsinen, M. J., Angioni, C., Eriksson, L. G., Gondhalekar, A., Hellsten, T., Johnson, T., ...
This version is available at the following Publisher URL: http://dx.doi.org/10.1088/0741-3335/44/8/307
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...
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...
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...
MHD stability with strongly reversed magnetic shear in JET (2002)
Hender, T. C., Hennequin, P., Alper, B., Hellsten, T., Howell, D. F., Huysmans, G. T. A., ...
Recent operation of JET with centrally strongly reversed magnetic shear, produced with the help of lower hybrid current drive, has extended the domain in which internal transport barriers (ITBs) can...
Modelling of Alfven waves in JET plasmas with the CASTOR-K code (2002)
Borba, D., Berk, H. L., Breizman, B. N., Fasoli, A., Nabais, F., Pinches, S. D., ...
A hybrid magnetohydrodynamic (M H D)-gyro-kinetic model CASTOR-K developed for the study of Alfven eigenmode (AE) stability in the presence of energetic ions has been applied to the interpretation of...
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...
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)...
Neutral beam stabilization of sawtooth oscillations in JET (2001)
Angioni, C., Pochelon, A., Gorelenkov, N.N., McClements, K.G, Sauter, O., Budny, R.V., ...
Theoretical Interpretation of Alfvén Cascades in Tokamaks with Nonmonotonic q Profiles (2001)
Berk, H. L., Borba, D. N., Breizman, B. N., Pinches, S. D., Sharapov, S. E.
Beam driven Alfven eigenmodes and fishbones in JET (2000)
Borba, D., Alper, B., Budny, R. V., Fasoli, A., Heeter, R. F., Kerner, W., ...
Fast particle driven instabilities are investigated at low toroidal field B-0 approximate to 1 T in tritium, deuterium and hydrogen plasmas. Tritium, deuterium and hydrogen neutral beams with...
Overview of alfven eigenmode experiments in jet (1995)
Fasoli, A., Lister, J. B., Sharapov, S. E., AliArshad, S., Bosia, G., Borba, D., ...
Results from the first experiments to drive Alfven Eigenmodes (AEs) with antennas external to a tokamak plasma are presented. In ohmically heated plasma discharges, direct experimental measurements...
Application of ICRF waves in tokamaks beyond heating
Mantsinen, M. J., Gauthier, E., Hoang, G. T., Joffrin, E., Koch, R., ...
The Role of Energetic Particles in Fusion Plasmas
Pinches, S. D., Berk, H. L., Borba, D. N., Fasoli, A., Gryaznevich, M., Kiptily, V., ...
Theoretical Studies of Alfvén Wave-Energetic Particle Interactions
Berk, H. L., Breizman, B. N., Chen, L., Eremin, D. E., Fu, G., Gorelenkov, N., ...
Observation of energetic particle driven modes relevant to advanced tokamak regimes
Nazikian, R., Alper, B., Berk, H. L., Borba, D., Boswell, C., Budny, R. V., ...
Determination of Internal Fields from Frequency Sweeping Observation
Berk, H. L., Eremin, D. E., Gryaznevich, M., Pinches, S. D., Sharapov, S. E.
The Role of Damping in Stable and Unstable Alfvén Eigenmodes
Pinches, S. D., Könies, A., Lauber, Ph., Berk, H. L., Sharapov, S. E., Gryaznavich, M.
n=0 Energetic Particle Driven Oscillations in JET
Berk, H. L., Boswell, C., Johnson, T., Nave, M. F. F., Pinches, S. D., Sharapov, S. E., ...