Production of Metallic Ions Beam in ECR Ion Source

ZHANG ZiMin; ZHAO HongWei; ZHAO YuBin; ZHANG XueZhen; GUO XiaoHong; LIU ZhanWen

Chinese Physics C> 2000, Vol. 24> Issue(10) : 974-978

Production of Metallic Ions Beam in ECR Ion Source

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

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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.

References

[1]

ZHANG ZiMin. Master Thesis, IMP. (in China), 1999, 51(张子民.硕士论文，中国科学院近代物理研究所,1999, 51)2 LHAO HongWei et al. High Energy Phys. and Nucl. Phys. (in Chinese)，1999, 23(7):717(赵红卫等.高能物理与核物理,1999,23(7):717)3 ZHANG HuaShun. Ion Source and High Power Neutralized Beam Source. Beijing: .Atcxnic Energy Press (in China)，1987, 169-717(张华顺.离子源和大功率中性束源，北京:原子能出版社，1987,169-171)4 Dushrnan S. Scientific Fcwndation of Vacuum Technique, New York John WileySONS. Inc. and London Chapman HALL Limited, 1949, 1275 Bogomolov S L, Efremov A, Kumer V B et al. Production of Ions of Metals with an ECR Ion Source at FLNR(JINR)Cyclotrons, Ptnceedings of the 14th International Workshop on ECR Source, Geneva,Switzerland, 1999, 716 Gammino S, Celona L, Ciavola G et al. Installation of ECR2 at LNS and Preliminary Tests, Proceedings of the 14th In-ternational Workshop nn ECR source, Gencva Switzerland, 1999, 1397 Baruce C，Been T. Dupuis M et al. Metallic Ion Developments at GANIL, Proceedings of the 14th Interrutional Workshop on ECR Source. Geneva, Switzerland, 1999.111

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 1998-08-10
Accepted Date: 1900-01-01
Available Online: 2000-10-05

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.