Helium transport and exhaust studies in DIII-D
Conference
·
OSTI ID:10183309
- Oak Ridge National Lab., TN (United States)
- Oak Ridge Associated Universities, TN (United States)
- General Atomics, San Diego, CA (United States)
- Univ. of California, Berkeley, CA (United States)
A better understanding of helium transport in the plasma core and edge in enhanced confinement regimes is now emerging from recent experimental studies on DIII-D. Overall, the results are encouraging. Significant helium exhaust has been obtained in a diverted, ELMing H-mode plasma, with {tau}{sub He}{sup *}/{tau}{sub E} {approximately} 10, and transport studies indicating that D{sub He}/X{sub eff} {approximately} 1 in all plasma conditions studied to date. However, measurements in the core and pumping plenum show a significant dilution of helium as it flows from the plasma core to the pumping plenum. Such dilution could be the limiting factor in the overall removal rate of helium in a reactor system.
- Research Organization:
- Oak Ridge National Lab., TN (United States); General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400; AC03-89ER51114
- OSTI ID:
- 10183309
- Report Number(s):
- CONF-940630--50; ON: DE94019111
- Country of Publication:
- United States
- Language:
- English
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