KAERI, Daejon, Republic of Korea
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| TUCOCK03 | Development of 14.5 GHz Electron Cyclotron Resonance Ion Source at KAERI | 105 |
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| A 14 GHz ECRIS has been designed and fabricated in KAERI (Korea Atomic Energy Research Institute) to produce multi-charged ion beam (especially for C6+ ion beam) for medical applications. The magnet system has solenoid coils made with copper conductor and a hexapole made with permanent magnet. The solenoid coils are composed of two axial coils to make mirror fields in both sides of the chamber and one trim coil at the center to control the layer of the resonance region. The hexapole is made with 24-sector NdFeB permanent magnet. Radial field higher than 1.2 T at the chamber wall position has been measured, and axial field higher than 1.7 T at the entrance center of RF power and 1.1 T at the exit center of ion beam have been measured. A welded tube with aluminum and stainless steel is used for a ECR plasma chamber to improve the production of secondary electron. Cooling channel is made on the wall of the Al tube. A 2 kW Krystron is used as a microwave energy source. A DC break made with PEEK(Polyether Ether Ketone) for high voltage insulation and field shielding, and a RF window made with ceramic for vacuum insulation are inserted in the RF circuit. A movable beam extractor with 8 mm aperture covers different species and different charge numbers of the beam. Experimental results on ECR plasma and initial beam extraction with KAERI ECR ion source will be discussed. | ||
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Slides TUCOCK03 [2.342 MB] | |