Recent Results with the 6 GHz Flat-B ECR Ion Source at ORNL-HRIBF

Y.Liu<SUP>1</SUP>; Y.Kawai<SUP>2</SUP>; G.D.Alton<SUP>1</SUP>

Chinese Physics C> 2007, Vol. 31> Issue(S1) : 80-84

Recent Results with the 6 GHz Flat-B ECR Ion Source at ORNL-HRIBF

Oak Ridge National Laboratory, Oak Ridge, TN 37831-6368, USA2 AccSys Technology, Pleasanton, CA 94566, USA

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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 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.

References

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Y.Liu¹, Y.Kawai² and G.D.Alton¹. Recent Results with the 6 GHz Flat-B ECR Ion Source at ORNL-HRIBF[J]. Chinese Physics C, 2007, 31(S1): 80-84.

Y.Liu¹, Y.Kawai² and G.D.Alton¹. Recent Results with the 6 GHz Flat-B ECR Ion Source at ORNL-HRIBF[J]. Chinese Physics C, 2007, 31(S1): 80-84. shu

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Received: 2007-05-30
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Recent Results with the 6 GHz Flat-B ECR Ion Source at ORNL-HRIBF

Oak Ridge National Laboratory, Oak Ridge, TN 37831-6368, USA2 AccSys Technology, Pleasanton, CA 94566, USA

Received Date: 2007-05-30

Accepted Date: 1900-01-01

Available Online: 2007-01-03

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 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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Recent Results with the 6 GHz Flat-B ECR Ion Source at ORNL-HRIBF

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