| ORNL-HRIBF 6GHzECR离子源的最新结果 |
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| 引用本文： | Y.Liu,Y.Kawai,G.D.Alton. ORNL-HRIBF 6GHzECR离子源的最新结果[J]. 中国物理 C, 2007, 31(Z1): 80-84 |
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| 作者姓名： | Y.Liu Y.Kawai G.D.Alton |
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| 作者单位： | AccSys Technology Pleasanton，CA 94566，USA，Oak Ridge National Laboratory，Oak Ridge，TN 37831-6368，USA |
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| 基金项目： | Supported by the U.S.Department of Energy under contract DE-AC05-00OR22725 with UT-Battelle,LLC |
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| 摘 要： | Experimental studies were conducted to characterize and improve the performance of the flat-B ECR ion source.The emittance of the source was investigated for the first time.The output beam currents of high-charge-states of Ar(q>8)were nearly doubled by increasing the plasma electrode aperture from 4mm to 6mm in diameter.To investigate possible enhancements with broadband microwave radiation,a"white"Gaussian noise generator was employed with a TWT amplifier to generate microwave radiation with a bandwidth of～200MHz.The performance of the flat-B ECR ion source was found to be much better with narrow bandwidth radiation when the source was operated in the flat-B region.However,the ion beam intensities and charge state distributions were improved with the broadband radiation when the source was tuned off the flat-B region.
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| 收稿时间： | 2007-05-30 |
| 修稿时间： | 2007-04-20 |
Recent Results with the 6GHz Flat-B ECR Ion Source at ORNL-HRIBF |
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| Y.Liu,Y.Kawai,G.D.Alton. Recent Results with the 6GHz Flat-B ECR Ion Source at ORNL-HRIBF[J]. High Energy Physics and Nuclear Physics, 2007, 31(Z1): 80-84 |
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| Authors: | Y.Liu Y.Kawai G.D.Alton |
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| Abstract: | Experimental studies were conducted to characterize and improve the performance of the flat-B ECR ion source.The emittance of the source was investigated for the first time.The output beam currents of high-charge-states of Ar (q>8) were nearly doubled by increasing the plasma electrode aperture from 4mm to 6mm in diameter.To investigate possible enhancements with broadband microwave radiation,a "white"Gaussian noise generator was employed with a TWT amplifier to generate microwave radiation with a bandwidth of～200MHz. The performance of the fiat-B ECR ion source was found to be much better with narrow bandwidth radiation when the source was operated in the fiat-B region.However.the ion beam intensities and charge state distributions were improved with the broadband radiation when the source was tuned off the flat-B region. |
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| Keywords: | ECR ion source flat-B configuration multi-charged ions broadband microwave emittance |
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