The effect of toroidal field ripple on confined alphas in TFTR D-T plasmas
- Princeton Univ., NJ (United States). Plasma Physics Lab.
- General Atomics, San Diego, CA (United States); and others
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.
- Research Organization:
- Princeton Univ., NJ (United States). Plasma Physics Lab.; General Atomics, San Diego, CA (United States); Arizona Univ., Tucson, AZ (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03073; FG03-92ER54150; AC02-83ER53153
- OSTI ID:
- 238591
- Report Number(s):
- PPPL--3178; ON: DE96010506
- Country of Publication:
- United States
- Language:
- English
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