ELMy H-modes in JET helium-4 plasmas

D. C. McDonald; J. G. Cordey; E. Righi; F. Ryter; G. Saibene; R. Sartori; B. Alper; M. Becoulet; J. Brzozowski; I. Coffey; M. De Baar; P. De Vries; K. Erents; W. Fundamenski; C. Giroud; I. Jenkins; A. Loarte; P. J. Lomas; G. P. Maddison; J. Mailloux; A. Murari; J. Ongena; J. Rapp; R. A. Pitts; M. Stamp; J. Strachan; W. Suttrop

doi:10.1088/0741-3335/46/3/007

ELMy H-modes in JET helium-4 plasmas

D. C. McDonald
, J. G. Cordey
, E. Righi
, F. Ryter
, G. Saibene
, R. Sartori
, B. Alper
, M. Becoulet
, J. Brzozowski
, I. Coffey
, M. De Baar
, P. De Vries
, K. Erents
, W. Fundamenski
, C. Giroud
, I. Jenkins
, A. Loarte
, P. J. Lomas
, G. P. Maddison
, J. Mailloux

A. Murari, J. Ongena, J. Rapp, R. A. Pitts, M. Stamp, J. Strachan, W. Suttrop

Laboratory for Plasma Physics

Culham Centre for Fusion Energy
EFDA CSU-Garching
European Commission
Max-Planck-Institut für Plasmaphysik
Commissariat à l'Énergie Atomique (CEA)
KTH Royal Institute of Technology
Queens University
FOM-Instituut voor Plasmafysica 'Rijnhuizen'
EFDA-JET
Ecole Polytechnique Federale de Lausanne
Princeton Plasma Physics Laboratory

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

66 Citations (Scopus)

Résumé

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 mind, a series of helium-4 H-mode experiments were performed on JET with pure helium-4 NET auxiliary heating (up to 12 MW). A set of ELMy H-mode plasmas were produced, in both the Type I ELM regime and a second regime, which showed characteristics similar to the deuterium Type III regime, but with a reverse ELM frequency dependence on power. Sawteeth were also observed, and had similar behaviour to those seen in deuterium. Compared with deuterium plasmas, Type I ELMy H-mode confinement is seen to be 28 ± 6% poorer in helium-4 plasmas and the L-H power threshold 42 ± 10% larger. This is the opposite of the behaviour predicted by experimental isotope mass scalings from hydrogenic plasmas.

langue originale	Anglais
Pages (de - à)	519-534
Nombre de pages	16
journal	Plasma Physics and Controlled Fusion
Volume	46
Numéro de publication	3
Les DOIs	https://doi.org/10.1088/0741-3335/46/3/007
état	Publié - mars 2004

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10.1088/0741-3335/46/3/007

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McDonald, D. C., Cordey, J. G., Righi, E., Ryter, F., Saibene, G., Sartori, R., Alper, B., Becoulet, M., Brzozowski, J., Coffey, I., De Baar, M., De Vries, P., Erents, K., Fundamenski, W., Giroud, C., Jenkins, I., Loarte, A., Lomas, P. J., Maddison, G. P., ... Suttrop, W. (2004). ELMy H-modes in JET helium-4 plasmas. Plasma Physics and Controlled Fusion, 46(3), 519-534. https://doi.org/10.1088/0741-3335/46/3/007

@article{778aa7f5c2df4f6992cedeeefeb83a6f,

title = "ELMy H-modes in JET helium-4 plasmas",

abstract = "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 mind, a series of helium-4 H-mode experiments were performed on JET with pure helium-4 NET auxiliary heating (up to 12 MW). A set of ELMy H-mode plasmas were produced, in both the Type I ELM regime and a second regime, which showed characteristics similar to the deuterium Type III regime, but with a reverse ELM frequency dependence on power. Sawteeth were also observed, and had similar behaviour to those seen in deuterium. Compared with deuterium plasmas, Type I ELMy H-mode confinement is seen to be 28 ± 6\% poorer in helium-4 plasmas and the L-H power threshold 42 ± 10\% larger. This is the opposite of the behaviour predicted by experimental isotope mass scalings from hydrogenic plasmas.",

author = "McDonald, \{D. C.\} and Cordey, \{J. G.\} and E. Righi and F. Ryter and G. Saibene and R. Sartori and B. Alper and M. Becoulet and J. Brzozowski and I. Coffey and \{De Baar\}, M. and \{De Vries\}, P. and K. Erents and W. Fundamenski and C. Giroud and I. Jenkins and A. Loarte and Lomas, \{P. J.\} and Maddison, \{G. P.\} and J. Mailloux and A. Murari and J. Ongena and J. Rapp and Pitts, \{R. A.\} and M. Stamp and J. Strachan and W. Suttrop",

year = "2004",

month = mar,

doi = "10.1088/0741-3335/46/3/007",

language = "English",

volume = "46",

pages = "519--534",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

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McDonald, DC, Cordey, JG, Righi, E, Ryter, F, Saibene, G, Sartori, R, Alper, B, Becoulet, M, Brzozowski, J, Coffey, I, De Baar, M, De Vries, P, Erents, K, Fundamenski, W, Giroud, C, Jenkins, I, Loarte, A, Lomas, PJ, Maddison, GP, Mailloux, J, Murari, A, Ongena, J, Rapp, J, Pitts, RA, Stamp, M, Strachan, J & Suttrop, W 2004, 'ELMy H-modes in JET helium-4 plasmas', Plasma Physics and Controlled Fusion, VOL. 46, Numéro 3, p. 519-534. https://doi.org/10.1088/0741-3335/46/3/007

TY - JOUR

T1 - ELMy H-modes in JET helium-4 plasmas

AU - McDonald, D. C.

AU - Cordey, J. G.

AU - Righi, E.

AU - Ryter, F.

AU - Saibene, G.

AU - Sartori, R.

AU - Alper, B.

AU - Becoulet, M.

AU - Brzozowski, J.

AU - Coffey, I.

AU - De Baar, M.

AU - De Vries, P.

AU - Erents, K.

AU - Fundamenski, W.

AU - Giroud, C.

AU - Jenkins, I.

AU - Loarte, A.

AU - Lomas, P. J.

AU - Maddison, G. P.

AU - Mailloux, J.

AU - Murari, A.

AU - Ongena, J.

AU - Rapp, J.

AU - Pitts, R. A.

AU - Stamp, M.

AU - Strachan, J.

AU - Suttrop, W.

PY - 2004/3

Y1 - 2004/3

N2 - 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 mind, a series of helium-4 H-mode experiments were performed on JET with pure helium-4 NET auxiliary heating (up to 12 MW). A set of ELMy H-mode plasmas were produced, in both the Type I ELM regime and a second regime, which showed characteristics similar to the deuterium Type III regime, but with a reverse ELM frequency dependence on power. Sawteeth were also observed, and had similar behaviour to those seen in deuterium. Compared with deuterium plasmas, Type I ELMy H-mode confinement is seen to be 28 ± 6% poorer in helium-4 plasmas and the L-H power threshold 42 ± 10% larger. This is the opposite of the behaviour predicted by experimental isotope mass scalings from hydrogenic plasmas.

AB - 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 mind, a series of helium-4 H-mode experiments were performed on JET with pure helium-4 NET auxiliary heating (up to 12 MW). A set of ELMy H-mode plasmas were produced, in both the Type I ELM regime and a second regime, which showed characteristics similar to the deuterium Type III regime, but with a reverse ELM frequency dependence on power. Sawteeth were also observed, and had similar behaviour to those seen in deuterium. Compared with deuterium plasmas, Type I ELMy H-mode confinement is seen to be 28 ± 6% poorer in helium-4 plasmas and the L-H power threshold 42 ± 10% larger. This is the opposite of the behaviour predicted by experimental isotope mass scalings from hydrogenic plasmas.

UR - https://www.scopus.com/pages/publications/12144287561

U2 - 10.1088/0741-3335/46/3/007

DO - 10.1088/0741-3335/46/3/007

M3 - Article

AN - SCOPUS:12144287561

SN - 0741-3335

VL - 46

SP - 519

EP - 534

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 3

ER -

ELMy H-modes in JET helium-4 plasmas

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