S. Succi, A. H. Kritz, J. Vaclavik, S. Succi, L. Muschietti, ...
137 (1984).
T. Bergkvist, T. Hellsten, T. Johnson
Abstract. Alfvén eigenmodes (AEs) excited by fusion born α particles can degrade the heating efficiency of a burning plasma and throw out αs. To experimentally study the effects of excitation of...
T. Bergkvist, T. Hellsten, K. Holmström
Alfvén eigenmodes (AEs) excited by α particles in a burning plasma can degrade the heating efficiency by spatial redistribution of the resonant α particles. Changes of the orbit invariants in...
On the Dynamics of Alfvén Eigenmode Excitation (2008)
K. Holmström, T. Bergkvist, T. Hellsten
Alfvén eigenmodes (AEs) excited by fast ions can cause losses of fast ions in thermonu-clear experiments. To describe the dynamics of the AE excitation, it is necessary to include the decorrelation...
Upgrade of the Monte Carlo code FIDO (2007)
J. Hedin, T. Johnson, T. Hellsten
During rf heating on minority ions and current drive the velocity distribution is determined by the balance between the wave-particle interaction and the relaxation through Coulomb collision. This is...
Self-consistent calculations of parasitic ion absorption during fast (2007)
J. Hedin, T. Hellsten, J. Carlsson
wave electron current drive
Parasitic Absorption By Fusion Born α-particles in ICRF Heated Plasmas (2007)
J. Hedin, J. Carlsson, T. Hellsten, A. Jaun
Abstract. A method has been developed to calculate the dielectric tensor in a
New Mechanisms of Minority Ion Cyclotron Current Drive (2007)
J. Carlsson, T. Hellsten, J. Hedin
Minority ion cyclotron current drive is studied by solving the Fokker-Planck equation in toroidal geometry keeping the ∂/∂v�-term in the quasilinear operator, hereby including the important...
T. Hellsten, J. Carlsson, J. Hedin, J. Källbäck
Self-consistent calculations of ICRH for toroidally directed wave spectrum have revealed the importance of including finite orbit width and RF-induced spatial transport. This is in particular...
Fast Wave Current Drive and Direct Electron Heating in JET ITB Plasmas (2007)
Hellsten, T., Laxaback, M., Bergkvist, T., Johnson, T., Mantsinen, M., Matthews, G., ...
Recent progress in JET on Heating and Current Drive studies in view of ITER (2007)
Ongena, J., Mailloux, J., Baranov, Yu., Bertalot, L., Callis, C. D., Corrigan, G., ...
Modification of sawtooth oscillations with ICRF waves in the JET tokamak (2007)
Mantsinen, M.J., Alper, B., Angioni, C., Buttery, R., Coda, S., ...
On resonance absorption and continuum damping (vol 5, pg 3801, 1998) (2007)
Jaun, A., Appert, K., Hellsten, T., Vaclavik, J., Villard, L.
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., ...
Overview of Recent Results on Heating and Current Drive in JET (2007)
Ongena, J., Baranov, Yu., Bobkov, V., Challis, C. D., Colas, L., Durodie, F., ...
Modification of sawtooth oscillations with ICRF waves in the JET tokamak (2007)
MANTSINEN, MJ, ALPER, B, ANGIONI, C, BUTTERY, R, CODA, S, ERIKSSON, LG, ...
Overview of recent results on heating and current drive in JET (2007)
ONGENA, J, BARANOV, Y, BOBKOV, V, CHALLIS, CD, COLAS, L, DURODIE, F, ...
Fast Wave Current Drive an Direction Electron Heating in JET ITB Plasmas (2007)
HELLSTEN, T, LAXABACK, M, BERGKVIST, T, JOHNSON, T, MEO, F, NGUYEN, F, ...
Recent progress in JET on Heating and Current Drive studies in view of ITER (2007)
ONGENA, J, ONGENA, J, ERIKSSON, L, GRAVES, J, MAYORAL, M, MAILLOUX, J, ...
Fast Wave Current Drive and Direct Electron Heating in JET ITB Plasmas (2006)
Hellsten, T., Laxaback, M., Bergkvist, T., Johnson, T., Mantsinen, M., Matthews, G., ...
Recent progress in JET on Heating and Current Drive studies in view of ITER (2006)
Ongena, J., Mailloux, J., Baranov, Yu., Bertalot, L., Callis, C.D., Corrigan, G., ...
Expanding the operating space of ICRF on JET with a view to ITER (2006)
Lamalle, P.U., Mantsinen, M.J., Alper, B., Beaumont, P., Bertalot, L., ...
On Ion Cyclotron Current Drive for Sawtooth Control (2006)
Johnson, T., Mayoral, M. L., Buttery, R. J., Coda, S., McDonald, D., ...
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...
Expanding the operating space of ICRF on JET with a view to ITER (2006)
LAMALLE, PU, MANTSINEN, MJ, Noterdaeme, Jean-Marie, ALPER, B, BEAUMONT, P, BERTALOT, L, ...
On ion cyclotron current drive for sawtooth control (2006)
ERIKSSON, LG, JOHNSON, T, MAYORAL, ML, CODA, S, SAUTER, O, BUTTERY, RJ, ...
Expanding the operating space of ICRF on JET with a view to ITER (2006)
Lamalle, P.U., Mantsinen, M.J., Alper, B., Beaumont, P., Bertalot, L., ...
Nuclear Fusion Vol.46, 391 - 400
Expanding the operating space of ICRF on JET with a view to ITER. (2006)
Lamalle, P.U., Mantsinen, M.J., Noterdaeme, J.M., Alper, B., Beaumont, P., Bertalot, L., ...
Nuclear Fusion, 46(2006) S.391-400
Fast Wave Current Drive in JET ITB-Plasma (2005)
Hellsten, T., Laxaback, M., Bergkvist, T., Johnson, T., Meo, F., Nguyen, F., ...
On parasitic absorption in FWCD experiments in JET ITB plasmas (2005)
Hellsten, T., Laxaback, M., Bergkvist, T., Johnson, T., Meo, F., Nguyen, F., ...
On the parasitic absorption in FWCD experiments in JET ITB plasmas (2005)
Hellsten, T., Laxaback, M., Bergkvist, T., Johnson, T., Mantsinen, M., Matthews, G., ...
Fast ion disstributions driven by polychromatic ICRF waves on JET (2005)
Mantsinen, M.J., Kiptily, V., Laxaback, M., Salmi, A., Baranov, Yu., Barnsley, R., ...
Fast ion distributions driven by polychromatic ICRF waves on JET (2005)
MANTSINEN, MJ, KIPTILY, V, LAXABACK, M, SALMI, A, BARANOV, Y, BARNSLEY, R, ...
On the parasitic absorption in FWCD experiments in JET ITB plasmas (2005)
HELLSTEN, T, LAXABACK, M, BERGKVIST, T, JOHNSON, T, MEO, F, NGUYEN, F, ...
Fast Wave Current Drive in JET ITB-Plasma (2005)
HELLSTEN, T, LAXABACK, M, BERGKVIST, T, JOHNSON, T, MEO, F, NGUYEN, F, ...
On the parasitic absorption in FWCD experiments in JET ITB plasmas (2005)
Hellsten, T., Laxåback, M., Bergkvist, T., Johnson, T., Meo, F., Nguyen, F., ...
Nuclear Fusion Vol.45 Nr.7, 706 - 720
On parasitic absorption in FWCD experiments in JET ITB plasmas (2005)
Hellsten, T., Laxåback, M., Bergkvist, T., Johnson, T., Meo, F., Mantsinen, M., ...
32nd EPS Conference on Controlled Fusion and Plasma Physics. Tarragona, ES, 27 June - 1 July 2005. Europhysics Conference Abstracts. Vol. 29C, P-5.095
Experiments on ICRF Coupling with Different Phasings (2004)
Heikkinen, J. A., Bobkov, Vl.V., D'Ippolito, D. A., Hartmann, D. A., Myra, J., Rantamäki, K. M., ...
Plasma rotation induced by directed waves in the ion-cyclotron range of frequencies (2004)
Eriksson, L. G., Johnson, T., Hellsten, T., Giroud, C., Kiptily, V. G., Kirov, K., ...
Changes of the toroidal plasma rotation induced by directed waves in the ion-cyclotron range of frequencies (ICRF) have been identified experimentally for the first time on the JET tokamak. The...
Plasma rotation induced by directed waves in the ion-cyclotron range of frequencies (2004)
ERIKSSON, LG, JOHNSON, T, HELLSTEN, T, GIROUD, C, KIPTILY, VG, KIROV, K, ...
Localized bulk electron heating with ICRF mode conversion in the JET tokamak (2004)
MANTSINEN, MJ, MAYORAL, ML, VAN EESTER, D, ALPER, B, BARNSLEY, R, BEAUMONT, P, ...
Litaudon, X., Becoulet, A., Crisanti, F., Wolf, R. C., Baranov, Yu. F., Barbato, E., ...
In JET, advanced tokamak research mainly focuses on plasmas with internal transport barriers (ITBs) that are strongly influenced by the current density profile. A previously developed optimized shear...
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...
Spatially resolved toroidal plasma rotation with ICRF on JET (2003)
Righi, E., Chan, V., DeGrassie, J., Kirov, K., Mantsinen, M., ...
Plasmas heated by ICRF only in the JET tokamak show distinct structures in the toroidal rotation profile, with regions where &ddiff;ω/&ddiff;r>0 when the minority cyclotron resonance layer is far...
Litaudon, X., Bécoulet, A., Crisanti, F., Wolf, R. C., Baranov, Yu. F., Barbato, E., ...
In JET advanced tokamak research mainly focuses on plasmas with internal transport barriers (ITBs), generated by modifications of the current profile. The formerly developed optimised shear regime...
Bulk Plasma Rotation in the Presence of Waves in the Ion Cyclotron Range Frequencies (2003)
Assas, S., Giroud, C., DeGrassie, J., Hellsten, T., ...
Comparison of monochromatic and polychromatic ICRH on JET (2003)
Mantsinen, M.J., Laxaback, M., Salmi, A., Kiptily, V., Testa, D., Baranov, Y., ...
Fast Wave Current Drive in JET ITB-Plasmas (2003)
Hellsten, T., Laxaback, M., Johnson, T., Mantsinen, M., Matthews, G., Beaumont, P., ...
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...
Spatially resolved toroidal plasma rotation with ICRF on JET (2003)
Noterdaeme, Jean-Marie, RIGHI, E, CHAN, V, DEGRASSIE, J, KIROV, K, MANTSINEN, M, ...
Heating, current drive and energetic particle studies on JET in preparation of ITER operation (2003)
Noterdaeme, Jean-Marie, BUDNY, R, CARDINALI, A, CASTALDO, C, CESARIO, R, CRISANTI, F, ...
Comparison of monochromatic and polychromatic ICRH on JET (2003)
MANTSINEN, MJ, LAXABACK, M, SALMI, A, KIPTILY, V, TESTA, D, BARANOV, Y, ...
Fast wave current drive in JET ITB-plasmas (2003)
HELLSTEN, T, LAXABACK, M, JOHNSON, T, MANTSINEN, M, MATTHEWS, G, BEAUMONT, P, ...
Alpha tail production with ion cyclotron resonance heating of 4He-beam ions in JET plasmas (2002)
Mantsinen, M., Mayoral, M. L., Kiptily, V., Sharapov, S., Alper, B., Bickley, A., ...
An international database for the study of the formation of ITBs in tokamaks (2002)
Sips, A. C. C., Peeters, A. G., Ryter, F., Wolf, R., Greenwald, M., Gohil, P., ...
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...
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...
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...
Alpha-tail production with ion-cyclotron-resonance heating of He-4-beam ions in JET plasmas. (2002)
MANTSINEN, MJ, MAYORAL, ML, KIPTILY, VG, SHARAPOV, SE, ALPER, B, BICKLEY, A, ...
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)...
RF-Induced Pinch of Resonant 3He Minority Ions in JET (2001)
Johnson, T., Hellsten, T., Mantsinen, M., Kiptily, V., Sharapov, S., Hedin, J., ...
ICRF Mode Conversion Experiments on JET (2001)
Mantsinen, M., Bucalossi, J., De Baar, M., De Vries, P., Figueiredo, A., ...
Toroidal Plasma Rotation with ECRF on JET (2001)
Righi, E., De Grassie, J., Chan, V., Nave, M.F.F., ...
RF-induced pinch of resonant He-3 minority ions in JET (2001)
JOHNSON, T, HELLSTEN, T, MANTSINEN, M, KIPTILY, V, SHARAPOV, S, HEDIN, J, ...
Recent heating and current drive results on JET (2001)
TUCCILLO, AA, BARANOV, Y, BARBATO, E, BIBET, P, CASTALDO, C, CESARIO, R, ...
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
Recent heating and current drive results on JET (2001)
Tuccillo, A., Baranov, Y., Barbato, E., Bibet, Ph, Castaldo, C., Cesario, R., ...
AIP Conference Proceedings Nr.595, 209 - 216
On resonance absorption and continuum damping (1998)
Jaun, A., Appert, K., Hellsten, T., Vaclavik, J., Villard, L.
Toroidal mode conversion in the ICRF (1998)
Jaun, A., Hellsten, T., Chiu, S. C.
Mode conversion is studied in the ion cyclotron range of frequencies (ICRF), taking into account the toroidal geometry relevant for tokamaks. The global wavefields obtained using the gyrokinetic...
On resonance absorption and continuum damping (1998)
Jaun, A., Appert, K., Hellsten, T., Vaclavik, J., Villard, L.
The absorption of power is studied with fluid and gyrokinetic plasma models, when Alfven resonances provide for a weak damping in a partially standing wave field. Examples chosen in slab and toroidal...
Eriksson, L., Mantsinen, M., Borba, D., Fasoli A., R. Heeter, R., S. Sharapov, S., ...
The first experimental observation of a radio frequency (rf) wave-induced particle pinch of trapped ions has been made in experiments at the Joint European Torus with nearly on-axis high power...
Kinetic Alfvén eigenmodes in a hot tokamak plasma (1997)
Jaun, A., Appert, K., Fasoli, A., Hellsten, T., Lister, J.B., Vaclavik, J., ...
Kinetic Alfven eigenmodes in a hot tokamak plasma (1997)
Jaun, A., Appert, K., Fasoli, A., Hellsten, T., Lister, J., Vaclavik, J., ...
Kinetic effects such as finite ion Larmor excursions and resonant Landau interactions are studied in the toroidicity Alfven eigenmode (TAE) range of frequencies. A new Alfven mode conversion...
On resonance absorption and continuum damping (1997)
Jaun, A., Appert, K., Hellsten, T., Vaclavik, J., Villard, L.
Kinetic Alfvén eigenmodes in JET and DIII-D (1996)
Jaun, A., Hellsten, T., Appert, K., Fasoli, A., Lister, J.B., Vaclavik, J., ...
Studies of D-D Fusion Reactivity in High-Temperature Jet Plasmas (1991)
Adams, J. M., Balet, B., Boyd, D. A., Campbell, D. J., Challis, C. D., Christiansen, J. P., ...
The D-D fusion reactivity from JET plasmas has been optimized by using combined neutral beam injection and radiofrequency heating. Reaction rates of up to 2.9 x 10(16) reactions per second...
The physics of wave-coupling in low-frequency plasma heating (1988)
Appert, K., Hellsten, T., Lütjens, H., Sauter, O., Vaclavik, J., Villard, L.
The physics of wave-coupling in low-frequency plasma heating (1987)
Appert, K., Hellsten, T., Lütjens, H., Sauter, O., Vaclavik, J., Villard, L.
Computational Models for Wave Particle Interactions (1986)
Succi, S., Appert, K., Core, W., Hamnen, H., Hellsten, T., Vaclavik, J.
Computing of Rf Heating and Current Drive in Tokamaks (1986)
Appert, K., Hellsten, T., Sauter, O., Succi, S., Vaclavik, J., Villard, L.
Computing of RF heating and current-drive in tokamaks (1986)
Appert, K., Hellsten, T., Sauter, O., Succi, S., Vaclavik, J., Villard, L.
Computational models for wave-particle interactions (1985)
Succi, S., Appert, K., Core, W., Hamnén, H., Hellsten, T., Vaclavik, J.
Evidence for the Influence of Fast Ions and Toroidal Plasma Rotation
Johnson, T., Hellsten, T., Giroud, C., Kiptily, V. G., Kirov, K., ...
Bulk Plasma Rotation in the Presence of Waves in the Ion Cyclotron Range Frequencies
Assas, S., Giroud, C., DeGrassie, J., Hellsten, T., ...
Fast Wave Current Drive in JET
Hellsten, T., Johansson, T., Meo, F., Nguyen, F., Van Eester, D., Challis, C., ...
Comparison of monochromatic and polychromatic ICRH on JET
Mantsinen, M. J., Laxaback, M., Salmi, A., Kiptily, V., Testa, D., Baranov, Y., ...
Experiments on ICRF Coupling with Different Phasings
Heikkinen, J. A., Bobkov, Vl. V., D'Ippolito, D. A., Hartmann, D. A., Myra, J., Rantamäki, K. M., ...
Expanding the operating space of ICRF on JET with a view to ITER
Lamalle, P. U., Mantsinen, M. J., Blackman, T., Bobkov, Vl. V., Castaldo, C., ...