Title :
Vacuum pumping system for TPX
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
fDate :
30 Sep-5 Oct 1995
Abstract :
The design of the vacuum pumping system for TPX is discussed, and progress in the research and development effort is summarized. The TPX vacuum system will use cryocondensation pumps for hydrogenic divertor pumping and turbomolecular pumps for torus evacuation, glow discharge cleaning, and deuterium-helium divertor pumping. A set of poloidally and toroidally symmetric vacuum ducts will connect the torus to the vacuum pumps; this symmetry will permit simultaneous equal pumping speed at the upper and lower diverters, and it will minimize toroidal variations in divertor pumping speed. At the divertor plena the total cryocondensation pumping speed for D2 at 65°C and 1 mTorr will be 80 m3/s and the total turbomolecular pumping speed for D2 or He at 65°C and 1 mTorr will be 18 m3/s; the system will be compatible with upgrades to improve pumping speed, to operate continuously, or to operate with D-T fuel. The cryocondensation pumps will be custom units capable of completing a low temperature regeneration cycle in 1 hour
Keywords :
Tokamak devices; cryopumping; fusion reactor design; fusion reactor operation; vacuum pumps; 1 mtorr; 65 C; D-He; TPX; cryocondensation pumps; design; deuterium-helium divertor pumping; divertor pumping speed; glow discharge cleaning; hydrogenic divertor pumping; low temperature regeneration cycle; poloidally symmetric vacuum ducts; toroidally symmetric vacuum ducts; torus evacuation; turbomolecular pumps; vacuum pumping system; vacuum system; Cleaning; Ducts; Fuels; Glow discharges; Helium; Laboratories; Pumps; Research and development; Throughput; Vacuum systems;
Conference_Titel :
Fusion Engineering, 1995. SOFE '95. Seeking a New Energy Era., 16th IEEE/NPSS Symposium
Conference_Location :
Champaign, IL
Print_ISBN :
0-7803-2969-4
DOI :
10.1109/FUSION.1995.534469
