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Title: Performance of the beam chamber vacuum system of K = 500 cyclotron at Variable Energy Cyclotron Centre Kolkata

The beam chamber of Variable Energy Cyclotron Centre, Kolkata's K = 500 superconducting cyclotron is pumped by liquid helium cooled cryopanel with liquid nitrogen cooled radiation shield. Performance of the vacuum system was evaluated by cooling the cryopanel assembly with liquid nitrogen and liquid helium. Direct measurement of beam chamber pressure is quite difficult because of space restrictions and the presence of high magnetic field. Pressure gauges were placed away from the beam chamber. The beam chamber pressure was evaluated using a Monte Carlo simulation software for vacuum system and compared with measurements. The details of the vacuum system, measurements, and estimation of pressure of the beam chamber are described in this paper.
Authors:
; ;  [1]
  1. Variable Energy Cyclotron Centre, I/AF Bidhannagar, Kolkata 700064 (India)
Publication Date:
OSTI Identifier:
22308824
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAMS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; COOLING; CRYOGENIC FLUIDS; HELIUM; MAGNETIC FIELDS; MONTE CARLO METHOD; NITROGEN; PRESSURE GAGES; SHIELDS; SUPERCONDUCTING CYCLOTRONS; VACUUM SYSTEMS; VARIABLE ENERGY CYCLOTRONS