Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor

TFTR Group

doi:10.1063/1.872363

Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor

TFTR Group

Institute of Space and Plasma Sciences

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Alpha-driven toroidal Alfvén eigenmodes (TAEs) are observed as predicted by theory in the post-neutral beam phase in high central q (safety factor) deuterium–tritium (D–T) plasmas in the Tokamak Fusion Test Reactor (TFTR) [D. J. Grove and D. M. Meade, Nucl. Fusion 25, 1167 (1985)]. The mode location, poloidal structure, and the importance of q profile for TAE instability are discussed. So far no alpha particle loss due to these modes was detected due to the small mode amplitude. However, alpha loss induced by kinetic ballooning modes (KBMs) was observed in high-confinement D–T discharges. Particle orbit simulation demonstrates that the wave–particle resonant interaction can explain the observed correlation between the increase in alpha loss and appearance of multiple high-n (n⩾6, n is the toroidal mode number) modes.

Original language	English
Pages (from-to)	1610-1616
Number of pages	7
Journal	Physics of Plasmas
Volume	4
Issue number	5
DOIs	https://doi.org/10.1063/1.872363
Publication status	Published - 1997 May

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Access to Document

10.1063/1.872363

Cite this

@article{1fbe30b28e2f41ecafb0e7c9a302e5b9,

title = "Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor",

abstract = "Alpha-driven toroidal Alfv{\'e}n eigenmodes (TAEs) are observed as predicted by theory in the post-neutral beam phase in high central q (safety factor) deuterium–tritium (D–T) plasmas in the Tokamak Fusion Test Reactor (TFTR) [D. J. Grove and D. M. Meade, Nucl. Fusion 25, 1167 (1985)]. The mode location, poloidal structure, and the importance of q profile for TAE instability are discussed. So far no alpha particle loss due to these modes was detected due to the small mode amplitude. However, alpha loss induced by kinetic ballooning modes (KBMs) was observed in high-confinement D–T discharges. Particle orbit simulation demonstrates that the wave–particle resonant interaction can explain the observed correlation between the increase in alpha loss and appearance of multiple high-n (n⩾6, n is the toroidal mode number) modes.",

author = "{TFTR Group} and Z. Chang and R. Nazikian and fu, {G. Y.} and White, {R. B.} and Zweben, {S. J.} and Fredrickson, {E. D.} and Batha, {S. H.} and Bell, {M. G.} and Bell, {R. E.} and Budny, {R. V.} and Bush, {C. E.} and L. Chen and Cheng, {C. Z.} and D. Darrow and B. Leblanc and Levinton, {F. M.} and Majeski, {R. P.} and Mansfield, {D. K.} and Mcguire, {K. M.} and Park, {H. K.} and G. Rewoldt and Synakowski, {E. J.} and Tang, {W. M.} and G. Taylor and {Von Goeler}, S. and Wong, {K. L.} and L. Zakharov",

year = "1997",

month = may,

doi = "10.1063/1.872363",

language = "English",

volume = "4",

pages = "1610--1616",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics Publising LLC",

number = "5",

}

TY - JOUR

T1 - Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor

AU - TFTR Group

AU - Chang, Z.

AU - Nazikian, R.

AU - fu, G. Y.

AU - White, R. B.

AU - Zweben, S. J.

AU - Fredrickson, E. D.

AU - Batha, S. H.

AU - Bell, M. G.

AU - Bell, R. E.

AU - Budny, R. V.

AU - Bush, C. E.

AU - Chen, L.

AU - Cheng, C. Z.

AU - Darrow, D.

AU - Leblanc, B.

AU - Levinton, F. M.

AU - Majeski, R. P.

AU - Mansfield, D. K.

AU - Mcguire, K. M.

AU - Park, H. K.

AU - Rewoldt, G.

AU - Synakowski, E. J.

AU - Tang, W. M.

AU - Taylor, G.

AU - Von Goeler, S.

AU - Wong, K. L.

AU - Zakharov, L.

PY - 1997/5

Y1 - 1997/5

N2 - Alpha-driven toroidal Alfvén eigenmodes (TAEs) are observed as predicted by theory in the post-neutral beam phase in high central q (safety factor) deuterium–tritium (D–T) plasmas in the Tokamak Fusion Test Reactor (TFTR) [D. J. Grove and D. M. Meade, Nucl. Fusion 25, 1167 (1985)]. The mode location, poloidal structure, and the importance of q profile for TAE instability are discussed. So far no alpha particle loss due to these modes was detected due to the small mode amplitude. However, alpha loss induced by kinetic ballooning modes (KBMs) was observed in high-confinement D–T discharges. Particle orbit simulation demonstrates that the wave–particle resonant interaction can explain the observed correlation between the increase in alpha loss and appearance of multiple high-n (n⩾6, n is the toroidal mode number) modes.

AB - Alpha-driven toroidal Alfvén eigenmodes (TAEs) are observed as predicted by theory in the post-neutral beam phase in high central q (safety factor) deuterium–tritium (D–T) plasmas in the Tokamak Fusion Test Reactor (TFTR) [D. J. Grove and D. M. Meade, Nucl. Fusion 25, 1167 (1985)]. The mode location, poloidal structure, and the importance of q profile for TAE instability are discussed. So far no alpha particle loss due to these modes was detected due to the small mode amplitude. However, alpha loss induced by kinetic ballooning modes (KBMs) was observed in high-confinement D–T discharges. Particle orbit simulation demonstrates that the wave–particle resonant interaction can explain the observed correlation between the increase in alpha loss and appearance of multiple high-n (n⩾6, n is the toroidal mode number) modes.

UR - http://www.scopus.com/inward/record.url?scp=22244480300&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=22244480300&partnerID=8YFLogxK

U2 - 10.1063/1.872363

DO - 10.1063/1.872363

M3 - Article

SN - 1070-664X

VL - 4

SP - 1610

EP - 1616

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5

ER -

Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this