Design of first walls and beam dumps for Tandem Mirror Experiment Upgrade
Neutral reflux from the first walls and beam dumps of the Tandem Mirror Experiment (TMX) Upgrade could erode the neutral-beam-fueled end-cell plasma or cool the neutral-beam-heated central-cell plasma. To allow the TMX Upgrade to meet its design parameters, the neutral reflux to the plasma must be much less than the fluxes of both charge-exchange neutral products to the first walls and transmitted neutral-beam atoms to the beam dumps. To achieve this, we intend to evaporate titanium as a getter on the first wall and install vanadium-foil beam dumps. The vanadium beam dumps will be heated by the neutral beam during the shot, releasing most of the implanted hydrogen as they cool radiatively after the shot. The deposited titanium will be thick enough to retain the implanted charge-exchange neutral products. We describe our design of these components, report our estimates of their performance, and compare their performance to the needs of TMX Upgrade.
- Research Organization:
- Lawrence Livermore National Laboratory, University of California, Livermore, California 94550
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5649103
- Journal Information:
- J. Vac. Sci. Technol.; (United States), Vol. 20:4
- Country of Publication:
- United States
- Language:
- English
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Design of first walls and beam dumps for Tandem Mirror Experiment Upgrade
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Related Subjects
TITANIUM
CHEMICAL VAPOR DEPOSITION
VACUUM COATING
VACUUM EVAPORATION
TMX DEVICES
DESIGN
PERFORMANCE
WALLS
ATOMIC BEAMS
BEAM INJECTION HEATING
BEAM-PLASMA SYSTEMS
ECR HEATING
HYDROGEN
ION BEAMS
NEUTRAL ATOM BEAM INJECTION
PLASMA PRODUCTION
VANADIUM
VANADIUM IONS
BEAM INJECTION
BEAMS
CHARGED PARTICLES
CHEMICAL COATING
DEPOSITION
ELEMENTS
EVAPORATION
HEATING
HIGH-FREQUENCY HEATING
IONS
MAGNETIC MIRRORS
METALS
NONMETALS
OPEN PLASMA DEVICES
PHASE TRANSFORMATIONS
PLASMA HEATING
SURFACE COATING
THERMONUCLEAR DEVICES
TRANSITION ELEMENTS
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production