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Transients on arc and Convertor Currents in the Multi-Cusp Cesiated Surface Conversion H-Ion Source at Lansce

Journal Article · · IEEE Pulsed Power Conference
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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The Multi-cusp Cesiated Surface Conversion H- Ion Source at the Los Alamos Neutron Science Center (LANSCE) has provided beam at ~14 mA, 120 Hz, and 10% D.F. for many years of neutron science research. Recently, random high current transients were discovered in the arc current used to ionize hydrogen in the LANSCE H- ion source, and in the convertor current used to convert protons to H- ions. Most have no effect, but more severe transients can cripple beam output. Hypothesized causes are related to cesiation effects, plasma instabilities, tungsten filament evaporation/sputtering, or from the arc modulator circuitry. A dedicated study was recently done on the LANSCE H- Ion source test stand to determine the cause of these transients. Current understanding indicates that the more severe transients come from a combination of cesiation effects and plasma instabilities. The status of these current transient studies on the LANSCE H- ion source will be discussed.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1623424
Alternate ID(s):
OSTI ID: 1544660
Report Number(s):
LA-UR--19-21515
Journal Information:
IEEE Pulsed Power Conference, Journal Name: IEEE Pulsed Power Conference Vol. 2019; ISSN 2158-4915
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

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