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Title: Operational and theoretical temperature considerations in a Penning surface plasma source

A fully detailed 3D thermal model of the ISIS Penning surface plasma source is developed in ANSYS. The proportion of discharge power applied to the anode and cathode is varied until the simulation matches the operational temperature observations. The range of possible thermal contact resistances are modelled, which gives an estimation that between 67% and 85% of the discharge power goes to the cathode. Transient models show the electrode surface temperature rise during the discharge pulse for a range of duty cycles. The implications of these measurements are discussed and a mechanism for governing cesium coverage proposed. The requirements for the design of a high current long pulse source are stated.
Authors:
;  [1] ;  [2] ;  [3]
  1. ISIS Neutron and Muon Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, OX11 0QX (United Kingdom)
  2. CERN, Geneva (Switzerland)
  3. Muons Inc. United States of America (United States)
Publication Date:
OSTI Identifier:
22391421
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1655; Journal Issue: 1; Conference: NIBS 2014: 4. International Symposium on Negative Ions, Beams and Sources, Garching (Germany), 6-10 Oct 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; A CODES; ANODES; CATHODES; CESIUM; COMPUTERIZED SIMULATION; DESIGN; ELECTRIC CURRENTS; ELECTROMAGNETIC PULSES; PENNING DISCHARGES; PENNING ION SOURCES; PLASMA; SURFACES; TRANSIENTS