Production of Metallic Ions Beam in ECR Ion Source

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ZHANG ZiMin, ZHAO HongWei, ZHAO YuBin, ZHANG XueZhen, GUO XiaoHong and LIU ZhanWen. Production of Metallic Ions Beam in ECR Ion Source[J]. Chinese Physics C, 2000, 24(10): 974-978.
ZHANG ZiMin, ZHAO HongWei, ZHAO YuBin, ZHANG XueZhen, GUO XiaoHong and LIU ZhanWen. Production of Metallic Ions Beam in ECR Ion Source[J]. Chinese Physics C, 2000, 24(10): 974-978. shu
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Received: 1998-08-10
Revised: 1900-01-01
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Production of Metallic Ions Beam in ECR Ion Source

    Corresponding author: ZHANG ZiMin,
  • Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

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℃ with 110W electric power. 140eμA of Ca11+and 70eμA 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. 65eμA 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 was 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.

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