Measurements of tritium recycling and isotope exchange in TFTR | Zendy

C.H. Skinner | Zendy; J. Kamperschroer | Zendy; D. Mueller | Zendy; A. Nagy | Zendy; D.P. Stotler | Zendy

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Measurements of tritium recycling and isotope exchange in TFTR

Author(s) -

C.H. Skinner,

J. Kamperschroer,

D. Mueller,

A. Nagy,

D.P. Stotler

Publication year - 1996

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/270816

Subject(s) - tritium , atomic physics , balmer series , dissociation (chemistry) , alpha particle , tokamak fusion test reactor , plasma , nuclear physics , chemistry , radiochemistry , spectral line , physics , emission spectrum , tokamak , astronomy

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

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