Indirectly heated cathodes and duoplasmatron type electron feeds for positive ion sources

Conference · Mon Oct 19 00:00:00 EDT 1981

OSTI ID:5925323

Schechter, D E; Tsai, C C

Development of indirectly heated cathodes and duoplasmatron type electron feed assemblies is being pursued for use on positive ion sources of neutral beam systems. The cathodes utilize La/sub 2/O/sub 3/ doped molybdenum emission surfaces which supply ionizing electrons for a large rectangular (28 cm. x 60 cm.) magnetic multi-cusp confinement chamber. Single and double electron feed assemblies with different electrode geometries were tested at discharge currents of greater than or equal to 1000 A and pulse lengths of approx. 35 sec. Details of construction and performance results such as plasma uniformity are discussed.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5925323
• Report Number(s): CONF-8110118-2(Draft); ON: DE82002942; TRN: 82-001487
• Resource Relation: Conference: 3. neutral beam workshop jointly sponsored by DOE/IAEA/ORNL, Gatlinburg, TN, USA, 19 Oct 1981; Other Information: Handwritten MS
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DUOPLASMATRONS
CATHODES
ION SOURCES
CATIONS
CUSPED GEOMETRIES
LANTHANUM OXIDES
NEUTRAL BEAM SOURCES
CHALCOGENIDES
CHARGED PARTICLES
ELECTRODES
ELECTRON TUBES
IONS
LANTHANUM COMPOUNDS
MAGNETIC FIELD CONFIGURATIONS
OPEN CONFIGURATIONS
OXIDES
OXYGEN COMPOUNDS
PLASMATRONS
RARE EARTH COMPOUNDS
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Heating
& Injection Systems