Measurements of tritium recycling and isotope exchange in TFTR

Technical Report · Wed May 01 04:00:00 EDT 1996

DOI:https://doi.org/10.2172/270816· OSTI ID:270816

Skinner, C H; Kamperschroer, J; Mueller, D; Nagy, A; Stotler, D P

Tritium Balmer-alpha (T{sub {alpha}}) emission, along with H{sub {alpha}} and D{sub {alpha}} is observed in the current D-T experimental campaign in TFTR. The data are a measure of the fueling of the plasma by tritium accumulated in the TFTR limiter and the spectral profile maps neutral hydrogenic velocities. T{sub {alpha}} is relatively slow to appear in tritium neutral beam heated discharges, (T{sub {alpha}}/(H{sub {alpha}} + D{sub {alpha}} + T{sub {alpha}}) = 11% after 8 tritium-only neutral beam discharges). In contrast, the T{sub {alpha}} fraction in a sequence of six discharges fueled with tritium puff,s increased to 44%. Larger transient increases (up to 75% T{sub {alpha}}) were observed during subsequent tritium gas puffs. Analysis of the Doppler broadened spectral profiles revealed overall agreement with the dissociation, charge exchange, sputtering and reflection velocities predicted by the neutral Monte-Carlo code DEGAS with some deficiency in the treatment of dissociation products in the 10--100 eV range.

• Research Organization: Princeton Univ., NJ (United States). Plasma Physics Lab.
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 270816
• Report Number(s): PPPL--3188; CONF-960569--6; ON: DE96012018
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BALMER LINES
COMPARATIVE EVALUATIONS
D-T OPERATION
DEUTERIUM
EXPERIMENTAL DATA
INVENTORIES
IONIC COMPOSITION
ISOTOPIC EXCHANGE
NEUTRAL ATOM BEAM INJECTION
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA SCRAPE-OFF LAYER
RECYCLING
SPECTRAL SHIFT
SPECTROSCOPY
TFTR TOKAMAK
THERMONUCLEAR REACTOR FUELING
TRITIUM