Effect of low density H-mode operation on edge and divertor plasma parameters
- Oak Ridge Associated Universities, Inc., TN (United States)
- Oak Ridge National Lab., TN (United States)
- Sandia National Labs., Albuquerque, NM (United States); and others
We present a study of the impact of H-mode operation at low density on divertor plasma parameters on the DIII-D tokamak. The line-average density in H-mode was scanned by variation of the particle exhaust rate, using the recently installed divertor cryo-condensation pump. The maximum decrease (50%) in line-average electron density was accompanied by a factor of 2 increase in the edge electron temperature, and 10% and 20% reductions in the measured core and divertor radiated power, respectively. The measured total power to the inboard divertor target increased by a factor of 3, with the major contribution coming from a factor of 5 increase in the peak heat flux very close to the inner strike point. The measured increase in power at the inboard divertor target was approximately equal to the measured decrease in core and divertor radiation.
- Research Organization:
- General Atomics, San Diego, CA (United States); Oak Ridge National Lab., TN (United States); Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-89ER51114; AC05-84OR21400; W-7405-ENG-48
- OSTI ID:
- 10173278
- Report Number(s):
- GA-A-21705; CONF-940580-10; ON: DE94016521; BR: 35AT10020/35KC07000; TRN: 94:015612
- Resource Relation:
- Conference: 11. international conference on plasma surface interactions in controlled fusion devices,Mito (Japan),23-27 May 1994; Other Information: PBD: Jul 1994
- Country of Publication:
- United States
- Language:
- English
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