The effect of toroidal field ripple on confined alphas in TFTR D-T plasmas

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Description

The Pellet Charge Exchange (PCX) diagnostic on the Tokamak Fusion Test Reactor (TFTR) presently measures trapped alpha distribution functions with very small pitch angle (v {parallel} /v {approximately} 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 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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23 p.

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Duong, H.H.; Medley, S.S. & Fisher, R.K. May 1, 1996.

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Description

The Pellet Charge Exchange (PCX) diagnostic on the Tokamak Fusion Test Reactor (TFTR) presently measures trapped alpha distribution functions with very small pitch angle (v {parallel} /v {approximately} 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 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.

Physical Description

23 p.

Notes

INIS; OSTI as DE96010506

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  • Other Information: PBD: May 1996

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  • Other: DE96010506
  • Report No.: PPPL--3178
  • Grant Number: AC02-76CH03073;FG03-92ER54150;AC02-83ER53153
  • DOI: 10.2172/238591 | External Link
  • Office of Scientific & Technical Information Report Number: 238591
  • Archival Resource Key: ark:/67531/metadc666421

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  • May 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Aug. 1, 2016, 6:52 p.m.

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Duong, H.H.; Medley, S.S. & Fisher, R.K. The effect of toroidal field ripple on confined alphas in TFTR D-T plasmas, report, May 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc666421/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.