The edge plasma and divertor in TIBER

Conference · Fri Oct 16 00:00:00 EDT 1987

OSTI ID:5791624

Barr, W L

An open divertor configuration has been adopted for TIBER. Most recent designs, including DIII-D, NET and CIT use open configurations and rely on a dense edge plasma to shield the plasma from the gas produced at the neutralizer plate. Experiments on ASDEX, PDX, D-III, and recently on DIII-D have shown that a dense edge plasma can be produced by re-ionizing most of the gas produced at the plate. This high recycling mode allows a large flux of particles to carry the heat to the plate, so that the mean energy per particle can be low. Erosion of the plate can be greatly reduced if the average impact energy of the ions at the plate can be reduced to near or below the threshold for sputtering of the plate material. The present configuration allows part of the flux of edge plasma ions to be neutralized at the entrance to the pumping duct so that helium is pumped as well as hydrogen. 7 refs., 3 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5791624
• Report Number(s): UCRL-96677; CONF-871007-46; ON: DE88001661
• Resource Relation: Conference: 12. symposium on fusion engineering, Monterey, CA, USA, 12 Oct 1987; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TIBER-X TOKAMAK
DIVERTORS
BOUNDARY CONDITIONS
ENERGY TRANSPORT
HEAT FLUX
LIMITERS
PLASMA SCRAPE-OFF LAYER
PLASMA SHEATH
PUMPING
STEADY-STATE CONDITIONS
BOUNDARY LAYERS
LAYERS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
700209* - Fusion Power Plant Technology- Component Development & Materials Testing