Measurements of tritium recycling and isotope exchange in TFTR

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

doi:10.1016/s0022-3115(97)80160-2

Measurements of tritium recycling and isotope exchange in TFTR

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

PPPL Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Tritium Balmer-alpha (T_α) emission, along with H_α and D_α, 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_α is relatively slow to appear in tritium neutral beam heated discharges, (T_α/(H_α + D_α + T_α) = 11% after 8 tritium-only neutral beam discharges). In contrast, the T_α fraction in a sequence of six discharges fueled with tritium puffs, increased to 44%. Larger transient increases (up to 75% T_α) 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.

Original language	English (US)
Pages (from-to)	887-891
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	241-243
DOIs	https://doi.org/10.1016/s0022-3115(97)80160-2
State	Published - Feb 11 1997

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

Keywords

Line emission diagnostic
Monte Carlo simulation
TFTR
Tritium inventory and economy
Wall particle retention

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10.1016/s0022-3115(97)80160-2

Cite this

@article{a479ee3bd70a4c698a70474bb998a73a,

title = "Measurements of tritium recycling and isotope exchange in TFTR",

abstract = "Tritium Balmer-alpha (Tα) emission, along with Hα and Dα, 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. Tα is relatively slow to appear in tritium neutral beam heated discharges, (Tα/(Hα + Dα + Tα) = 11\% after 8 tritium-only neutral beam discharges). In contrast, the Tα fraction in a sequence of six discharges fueled with tritium puffs, increased to 44\%. Larger transient increases (up to 75\% Tα) 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.",

keywords = "Line emission diagnostic, Monte Carlo simulation, TFTR, Tritium inventory and economy, Wall particle retention",

author = "Skinner, \{C. H.\} and J. Kamperschroer and D. Mueller and A. Nagy and Stotler, \{D. P.\}",

year = "1997",

month = feb,

day = "11",

doi = "10.1016/s0022-3115(97)80160-2",

language = "English (US)",

volume = "241-243",

pages = "887--891",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Measurements of tritium recycling and isotope exchange in TFTR

AU - Skinner, C. H.

AU - Kamperschroer, J.

AU - Mueller, D.

AU - Nagy, A.

AU - Stotler, D. P.

PY - 1997/2/11

Y1 - 1997/2/11

N2 - Tritium Balmer-alpha (Tα) emission, along with Hα and Dα, 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. Tα is relatively slow to appear in tritium neutral beam heated discharges, (Tα/(Hα + Dα + Tα) = 11% after 8 tritium-only neutral beam discharges). In contrast, the Tα fraction in a sequence of six discharges fueled with tritium puffs, increased to 44%. Larger transient increases (up to 75% Tα) 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.

AB - Tritium Balmer-alpha (Tα) emission, along with Hα and Dα, 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. Tα is relatively slow to appear in tritium neutral beam heated discharges, (Tα/(Hα + Dα + Tα) = 11% after 8 tritium-only neutral beam discharges). In contrast, the Tα fraction in a sequence of six discharges fueled with tritium puffs, increased to 44%. Larger transient increases (up to 75% Tα) 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.

KW - Line emission diagnostic

KW - Monte Carlo simulation

KW - TFTR

KW - Tritium inventory and economy

KW - Wall particle retention

UR - https://www.scopus.com/pages/publications/85086526420

UR - https://www.scopus.com/pages/publications/85086526420#tab=citedBy

U2 - 10.1016/s0022-3115(97)80160-2

DO - 10.1016/s0022-3115(97)80160-2

M3 - Article

AN - SCOPUS:85086526420

SN - 0022-3115

VL - 241-243

SP - 887

EP - 891

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Measurements of tritium recycling and isotope exchange in TFTR

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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