Design of first walls and beam dumps for Tandem Mirror Experiment Upgrade

Drake, R P; Lang, D D; Hunt, A L; Pickles, W L; Simonen, T C; Stack, T P; Wilson, K L; Baskes, M I; Haggmark, L G; Malinowski, M E

doi:10.1116/1.571563

Title: Design of first walls and beam dumps for Tandem Mirror Experiment Upgrade

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Abstract

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.

Authors:: Drake, R P; Lang, D D; Hunt, A L; Pickles, W L; Simonen, T C; Stack, T P; Wilson, K L; Baskes, M I; Haggmark, L G; Malinowski, M E

Publication Date:: Thu Apr 01 00:00:00 EST 1982

Research Org.:: Lawrence Livermore National Laboratory, University of California, Livermore, California 94550

OSTI Identifier:: 5649103

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Journal Article

Journal Name:: J. Vac. Sci. Technol.; (United States)

Additional Journal Information:: Journal Volume: 20:4

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 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

Citation Formats


                    Drake, R P, Lang, D D, Hunt, A L, Pickles, W L, Simonen, T C, Stack, T P, Wilson, K L, Baskes, M I, Haggmark, L G, and Malinowski, M E. Design of first walls and beam dumps for Tandem Mirror Experiment Upgrade.  United States: N. p., 1982. 
        Web.  doi:10.1116/1.571563.

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                    Drake, R P, Lang, D D, Hunt, A L, Pickles, W L, Simonen, T C, Stack, T P, Wilson, K L, Baskes, M I, Haggmark, L G, & Malinowski, M E. Design of first walls and beam dumps for Tandem Mirror Experiment Upgrade.  United States.  https://doi.org/10.1116/1.571563

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                    Drake, R P, Lang, D D, Hunt, A L, Pickles, W L, Simonen, T C, Stack, T P, Wilson, K L, Baskes, M I, Haggmark, L G, and Malinowski, M E. 1982.  
        "Design of first walls and beam dumps for Tandem Mirror Experiment Upgrade".  United States.  https://doi.org/10.1116/1.571563.

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@article{osti_5649103,

  title        = {Design of first walls and beam dumps for Tandem Mirror Experiment Upgrade},

  author       = {Drake, R P and Lang, D D and Hunt, A L and Pickles, W L and Simonen, T C and Stack, T P and Wilson, K L and Baskes, M I and Haggmark, L G and Malinowski, M E},

  abstractNote = {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.},

  doi          = {10.1116/1.571563},

  url          = {https://www.osti.gov/biblio/5649103},
  journal      = {J. Vac. Sci. Technol.; (United States)},
number       = ,

  volume       = 20:4,

  place        = {United States},

  year         = {Thu Apr 01 00:00:00 EST 1982},

  month        = {Thu Apr 01 00:00:00 EST 1982}

}

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