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Development of a magnetized coaxial plasma gun for compact toroid injection into the C-2 field-reversed configuration device

A compact toroid (CT) injector was developed for the C-2 device, primarily for refueling of field-reversed configurations. The CTs are formed by a magnetized coaxial plasma gun (MCPG), which consists of coaxial cylindrical electrodes and a bias coil for creating a magnetic field. First, a plasma rin...

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Published in:Review of scientific instruments 2016-05, Vol.87 (5), p.053512-053512
Main Authors: Matsumoto, T., Sekiguchi, J., Asai, T., Gota, H., Garate, E., Allfrey, I., Valentine, T., Morehouse, M., Roche, T., Kinley, J., Aefsky, S., Cordero, M., Waggoner, W., Binderbauer, M., Tajima, T.
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cited_by cdi_FETCH-LOGICAL-c411t-e3fa834a1747da84e3216e39a41a300bdad1146fc192dc08c9f8a69d7926634c3
cites cdi_FETCH-LOGICAL-c411t-e3fa834a1747da84e3216e39a41a300bdad1146fc192dc08c9f8a69d7926634c3
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container_issue 5
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container_title Review of scientific instruments
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creator Matsumoto, T.
Sekiguchi, J.
Asai, T.
Gota, H.
Garate, E.
Allfrey, I.
Valentine, T.
Morehouse, M.
Roche, T.
Kinley, J.
Aefsky, S.
Cordero, M.
Waggoner, W.
Binderbauer, M.
Tajima, T.
description A compact toroid (CT) injector was developed for the C-2 device, primarily for refueling of field-reversed configurations. The CTs are formed by a magnetized coaxial plasma gun (MCPG), which consists of coaxial cylindrical electrodes and a bias coil for creating a magnetic field. First, a plasma ring is generated by a discharge between the electrodes and is accelerated by Lorenz self-force. Then, the plasma ring is captured by an interlinkage flux (poloidal flux). Finally, the fully formed CT is ejected from the MCPG. The MCPG described herein has two gas injection ports that are arranged tangentially on the outer electrode. A tungsten-coated inner electrode has a head which can be replaced with a longer one to extend the length of the acceleration region for the CT. The developed MCPG has achieved supersonic CT velocities of ∼100 km/s. Plasma parameters for electron density, electron temperature, and the number of particles are ∼5 × 1021 m−3, ∼40 eV, and 0.5–1.0 × 1019, respectively.
doi_str_mv 10.1063/1.4952581
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The CTs are formed by a magnetized coaxial plasma gun (MCPG), which consists of coaxial cylindrical electrodes and a bias coil for creating a magnetic field. First, a plasma ring is generated by a discharge between the electrodes and is accelerated by Lorenz self-force. Then, the plasma ring is captured by an interlinkage flux (poloidal flux). Finally, the fully formed CT is ejected from the MCPG. The MCPG described herein has two gas injection ports that are arranged tangentially on the outer electrode. A tungsten-coated inner electrode has a head which can be replaced with a longer one to extend the length of the acceleration region for the CT. The developed MCPG has achieved supersonic CT velocities of ∼100 km/s. Plasma parameters for electron density, electron temperature, and the number of particles are ∼5 × 1021 m−3, ∼40 eV, and 0.5–1.0 × 1019, respectively.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><pmid>27250428</pmid><doi>10.1063/1.4952581</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-1611-1082</orcidid><orcidid>https://orcid.org/0000-0002-0846-8594</orcidid><orcidid>https://orcid.org/0000-0002-2698-4744</orcidid></addata></record>
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ispartof Review of scientific instruments, 2016-05, Vol.87 (5), p.053512-053512
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP_美国物理联合会现刊(与NSTL共建)
subjects ACCELERATION
Coated electrodes
COMPACTS
Configurations
CYLINDRICAL CONFIGURATION
Ejection
ELECTRODES
ELECTRON DENSITY
Electron energy
ELECTRON TEMPERATURE
ELECTRONS
FIELD-REVERSED THETA PINCH DEVICES
GAS INJECTION
INJECTION
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
LENGTH
MAGNETIC FIELDS
Magnetism
PARTICLES
Plasma
PLASMA GUNS
PLASMA RINGS
Poloidal flux
Scientific apparatus & instruments
TUNGSTEN
title Development of a magnetized coaxial plasma gun for compact toroid injection into the C-2 field-reversed configuration device
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