The effect of toroidal field ripple on confined alphas in TFTR DT plasmas

H. H. Duong; R. K. Fisher; S. S. Medley; M. P. Petrov; N. N. Gorelenkov; R. V. Budny; D. K. Mansfield; J. M. McChesney; P. B. Parks; A. L. Roquemore; R. B. White; S. J. Zweben

doi:10.1088/0029-5515/37/2/I11

The effect of toroidal field ripple on confined alphas in TFTR DT plasmas

H. H. Duong, R. K. Fisher, S. S. Medley, M. P. Petrov, N. N. Gorelenkov, R. V. Budny, D. K. Mansfield, J. M. McChesney, P. B. Parks, A. L. Roquemore, R. B. White, S. J. Zweben

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

18 Scopus citations

Abstract

The Pellet Charge Exchange (PCX) diagnostic on the Tokamak Fusion Test Reactor (TFTR) presently measures trapped alpha distribution functions with very small pitch angles (ν∥/ν ∼ 0.05) at the midplane. The measured PCX alpha signal exhibits a depletion region near the outboard region. Results of the alpha energy spectra and radial profile suggest that stochastic ripple diffusion is the cause of the depletion. Comparison of the ripple stochastization boundary with Goldston-White-Boozer theory also shows the correct functional dependence on alpha energy and q profile.

Original language	English (US)
Pages (from-to)	271-282
Number of pages	12
Journal	Nuclear Fusion
Volume	37
Issue number	2
DOIs	https://doi.org/10.1088/0029-5515/37/2/I11
State	Published - Feb 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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@article{e4b94ef2ff304c1b8192877ad46168de,

title = "The effect of toroidal field ripple on confined alphas in TFTR DT plasmas",

abstract = "The Pellet Charge Exchange (PCX) diagnostic on the Tokamak Fusion Test Reactor (TFTR) presently measures trapped alpha distribution functions with very small pitch angles (ν∥/ν ∼ 0.05) at the midplane. The measured PCX alpha signal exhibits a depletion region near the outboard region. Results of the alpha energy spectra and radial profile suggest that stochastic ripple diffusion is the cause of the depletion. Comparison of the ripple stochastization boundary with Goldston-White-Boozer theory also shows the correct functional dependence on alpha energy and q profile.",

author = "Duong, \{H. H.\} and Fisher, \{R. K.\} and Medley, \{S. S.\} and Petrov, \{M. P.\} and Gorelenkov, \{N. N.\} and Budny, \{R. V.\} and Mansfield, \{D. K.\} and McChesney, \{J. M.\} and Parks, \{P. B.\} and Roquemore, \{A. L.\} and White, \{R. B.\} and Zweben, \{S. J.\}",

year = "1997",

month = feb,

doi = "10.1088/0029-5515/37/2/I11",

language = "English (US)",

volume = "37",

pages = "271--282",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "2",

}

TY - JOUR

T1 - The effect of toroidal field ripple on confined alphas in TFTR DT plasmas

AU - Duong, H. H.

AU - Fisher, R. K.

AU - Medley, S. S.

AU - Petrov, M. P.

AU - Gorelenkov, N. N.

AU - Budny, R. V.

AU - Mansfield, D. K.

AU - McChesney, J. M.

AU - Parks, P. B.

AU - Roquemore, A. L.

AU - White, R. B.

AU - Zweben, S. J.

PY - 1997/2

Y1 - 1997/2

N2 - The Pellet Charge Exchange (PCX) diagnostic on the Tokamak Fusion Test Reactor (TFTR) presently measures trapped alpha distribution functions with very small pitch angles (ν∥/ν ∼ 0.05) at the midplane. The measured PCX alpha signal exhibits a depletion region near the outboard region. Results of the alpha energy spectra and radial profile suggest that stochastic ripple diffusion is the cause of the depletion. Comparison of the ripple stochastization boundary with Goldston-White-Boozer theory also shows the correct functional dependence on alpha energy and q profile.

AB - The Pellet Charge Exchange (PCX) diagnostic on the Tokamak Fusion Test Reactor (TFTR) presently measures trapped alpha distribution functions with very small pitch angles (ν∥/ν ∼ 0.05) at the midplane. The measured PCX alpha signal exhibits a depletion region near the outboard region. Results of the alpha energy spectra and radial profile suggest that stochastic ripple diffusion is the cause of the depletion. Comparison of the ripple stochastization boundary with Goldston-White-Boozer theory also shows the correct functional dependence on alpha energy and q profile.

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U2 - 10.1088/0029-5515/37/2/I11

DO - 10.1088/0029-5515/37/2/I11

M3 - Article

AN - SCOPUS:0031072811

SN - 0029-5515

VL - 37

SP - 271

EP - 282

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 2

ER -

The effect of toroidal field ripple on confined alphas in TFTR DT plasmas

Abstract

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