Enhanced performance discharges in the DIII-D tokamak with lighium wall conditioning
- General Atomics, San Diego, CA (United States)
- Oak Ridge National Lab., TN (United States); and others
Lithium wall conditioning has been used in a recent campaign evaluating high performance negative central shear (NCS) discharges. During this campaign, the highest values of stored energy (4.4 MJ), neutron rate (2.4 x 10{sup 16}/s), and nT{sub i}{tau} (7 x 10{sup 20} m{sup -3}-keV-s) achieved to date in DIII-D were obtained. High performance NCS discharges were achieved prior to beginning lithium conditioning, but it is clear that shot reproducibility and performance were improved by lithium conditioning. Central and edge oxygen concentrations were reduced after lithium conditioning, Lithium conditioning, consisting of up to four pellets injected at the end of the preceding discharge, allowed the duration of the usual inter-shot helium glow discharge to be reduced and reproducible high auxiliary power discharges, P{sub NBI} {<=} 22 MW, were obtained with plasma currents up to 2.4 MA.
- Research Organization:
- Sandia Labs., Livermore, CA (United States); General Atomics, San Diego, CA (United States); Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000; AC03-89ER51114; AC05-96OR22464
- OSTI ID:
- 243478
- Report Number(s):
- SAND--96-1423C; GA-A--22361; CONF-960569--3; ON: DE96011833
- Country of Publication:
- United States
- Language:
- English
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