Title: Production of metallic ions beam in ECR ion source
Abstract: The production of metallic ion beam by means of many methods in high charge state ECR (Electron Cyclotron Resonance) ion source is reviewed. A small evaporation oven with external diameter 8 mm and length 70 mm was tested for metallic ion beam production. The small oven could reach more than 1300 degrees C with 110W electric power. 140e mu A of Ca11+ and 70e mu A of Ca12+ beams were achieved on the 14.5 GHz ECR at 1MP ion source by using the oven. The Ca11+ beam had been provided to the IMP cyclotron for three weeks with a good stability. In order to obtain intense metallic ion beam, MIVOC (Metallic Ion from VOlatile Compound) method was tested successfully on the 14.5 GHz ECR ion source. 65e mu A of Fe10+ by MIVOC method was obtained. During running of the ion source with Ca11+, the oven temperature was not controlled easily by changing the electric power because of extra heating by microwave which was already tested. So a new type of oven nas designed in order to avoid this problem. MIVOC method is easy to be performed and beam intensity is high; but it is only suitable for a few metallic elements, on the other hand, the vacuum chamber of the ion source could be seriously contaminated if the ion source runs for a long time.
Publication Year: 2000
Publication Date: 2000-01-01
Language: en
Type: article
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