Operational and theoretical temperature considerations in a Penning surface plasma source

Journal Article · Wed Apr 08 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4916440· OSTI ID:22391421

Lawrie, S. R. ^[1]; Pereira Da Costa, H. ^[2]; Dudnikov, V. ^[3]

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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)

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.

• OSTI ID: 22391421
• Journal Information: AIP Conference Proceedings, Vol. 1655, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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