DocumentCode :
2345156
Title :
Vacuum and fueling systems for the IGNITEX experiment
Author :
Hallock ; Booth ; Carrera
Author_Institution :
Texas Univ., Austin, TX, USA
fYear :
1989
fDate :
0-0 1989
Firstpage :
159
Abstract :
Summary Form only given, as follows. Results of preliminary studies of the vacuum and fueling requirements for the proposed fusion ignition experiment IGNITEX are discussed. The vacuum system must provide sufficient pumping speed to reach a base pressure of about 10/sup -8/ torr to produce a clean environment for plasma formation. In addition, the pumping speed should meet the requirements of the discharge cleaning cycle. Initial estimates indicate that a pumping speed of about 1500 l/s will be adequate. Two different types of pumping systems, turbomolecular pumps and cryogenic pumps, have been considered. The fueling method will affect the profile of the plasma density, which in turn modifies the energy confinement and the plasma reactivity. Gas puffing can produce flattened density profiles, reducing energy confinement. More peaked density profiles can be provided by a pellet injection fueling system or by operation with reduced gas puffing. However, for the temperature and density regimes expected in the IGNITEX experiment, penetration of the pellets to the central regions of the plasma may be difficult to achieve. The practicality of a pellet injection system for high-density, high-temperature plasmas is being explored. The possibility of inducing high-density plasma breakdown by resonant cavity modes as a means of producing peaked density profiles is also being explored.<>
Keywords :
Tokamak devices; fusion reactor operation; pumps; vacuum techniques; 10/sup -8/ torr; IGNITEX experiment; base pressure; central regions; cryogenic pumps; discharge cleaning cycle; energy confinement; flattened density profiles; fueling systems; gas puffing; high-density plasma breakdown; peaked density profiles; pellet injection fueling system; penetration; plasma density; plasma reactivity; profile; pumping speed; reduced gas puffing; resonant cavity modes; turbomolecular pumps; vacuum system; Fusion power generation; Pumps; Tokamaks; Vacuum technology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 1989. IEEE Conference Record - Abstracts., 1989 IEEE International Conference on
Conference_Location :
Buffalo, NY, USA
Type :
conf
DOI :
10.1109/PLASMA.1989.166279
Filename :
166279
Link To Document :
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