Fast-ion radial diffusivity evaluated from vertical neutral particle measurements following short pulse beam injection into a TFTR ohmic plasma

Technical Report · Wed Jan 01 00:00:00 EST 1992

DOI:https://doi.org/10.2172/5934726· OSTI ID:5934726

Kusama, Y. ^[1]; Heidbrink, W. W. ^[2]; Barnes, C. W. ^[3]; Beer, M.; Hammett, G. W.; McCune, D. C.; Medley, S. S.; Scott, S. D.; Zarnstorff, M. C. ^[4]

---

1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
2. California Univ., Irvine, CA (United States)
3. Los Alamos National Lab., NM (United States)
4. Princeton Univ., NJ (United States). Plasma Physics Lab.

The radial diffusivity of fast ions was evaluated from vertical neutral particle measurements in experiments where a short pulse of neutral deuterium beams was injected into a TFTR ohmic deuterium plasma. A comparison between the temporal evolution of the measured neutral particle flux and theoretical calculations showed that the spatially-averaged diffusion coefficient of fast ions is {le} 0.1 m{sup 2}/sec. This value is approximately an order of magnitude less than the diffusion coefficient for thermal ions and is consistent with results obtained previously on TFTR from other diagnostics.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5934726
• Report Number(s): PPPL-2813; ON: DE92006645
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TFTR TOKAMAK
DIFFUSION
CHARGE EXCHANGE
DEUTERON BEAMS
HEAT TRANSFER
JOULE HEATING
NEUTRAL ATOM BEAM INJECTION
PLASMA DIAGNOSTICS
BEAM INJECTION
BEAMS
CLOSED PLASMA DEVICES
ELECTRIC HEATING
ENERGY TRANSFER
HEATING
ION BEAMS
PLASMA HEATING
RESISTANCE HEATING
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700330* - Plasma Kinetics
Transport
& Impurities- (1992-)
700320 - Plasma Diagnostic Techniques & Instrumentation- (1992-)