Advanced divertor experiments on DIII-D
- General Atomics, San Diego, CA (USA)
- Sandia National Labs., Livermore, CA (USA)
- Lawrence Livermore National Lab., CA (USA)
- Oak Ridge National Lab., TN (USA)
The poloidal divertor is presently favored for next-step, high-power tokamaks. The DIII-D Advanced Divertor Program (ADP) aims to gain increased control over the divertor plasma and tokamak boundary conditions. This paper reports experiments done in the first phase of the ADP. The DIII-D lower divertor was modified by the addition of a toroidally symmetric, graphite-armoured, water-cooled divertor-biasing ring electrode at the entrance to a gas plenum. The plenum will eventually contain a He cryogenic loop for active divertor pumping. The separatrix strike'' position is controlled by the lower poloidal field shaping coils and can be varied smoothly from the ring electrode upper surface to the divertor floor far from the entrance aperture. External power, at up to 550 V and 8 kA separately, has been applied to the electrode to date. 5 refs., 5 figs.
- Research Organization:
- General Atomics, San Diego, CA (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC03-89ER51114; AC05-84OR21400; AC04-76DP00789; W-7405-ENG-48
- OSTI ID:
- 5905512
- Report Number(s):
- GA-A-20480; CONF-910609-10; ON: DE91011138
- Resource Relation:
- Conference: 18. European conference on controlled fusion and plasma physics, Berlin (Germany, F.R.), 3-7 Jun 1991
- Country of Publication:
- United States
- Language:
- English
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DOUBLET REACTORS
POLOIDAL FIELD DIVERTORS
GRAPHITE
H-MODE PLASMA CONFINEMENT
HEAT FLUX
PLASMA SCRAPE-OFF LAYER
BOUNDARY LAYERS
CARBON
CONFINEMENT
DIVERTORS
ELEMENTAL MINERALS
ELEMENTS
LAYERS
MINERALS
NONMETALS
PLASMA CONFINEMENT
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
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