Preliminary experiment of thermionic RF gun with low back-bombardment

bai wei; li ming; shen xuming; chen ya’nan; wang hanbin; shan lijun; chen tiancai

Volume 23 Issue 10

Nov. 2011

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Article Navigation > High Power Laser and Particle Beams > 2011 > 23(10): 0-

wang xiao-kun, wang li-hui, zheng li-gong, et al. Application of subaperture stitching technology to test of large and steep aspherical surface[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

bai wei, li ming, shen xuming, et al. Preliminary experiment of thermionic RF gun with low back-bombardment[J]. High Power Laser and Particle Beams, 2011, 23.

wang xiao-kun, wang li-hui, zheng li-gong, et al. Application of subaperture stitching technology to test of large and steep aspherical surface[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

bai wei, li ming, shen xuming, et al. Preliminary experiment of thermionic RF gun with low back-bombardment[J]. High Power Laser and Particle Beams, 2011, 23.

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Preliminary experiment of thermionic RF gun with low back-bombardment

1.
Institute of Applied Electronics,CAEP,P.O.Box 919-1014,Mianyang 621900,China

Publish Date: 2011-10-15

Abstract

Abstract

A design scheme of microwave gun with two independent microwave power feed-in ports is proposed. Numerical simulation results show that the electron back-bombardment of the thermionic-cathode microwave gun can be greatly decreased, and high quality electron beams can be obtained by adjusting the phase displacement between the two microwave ports. Cold test results of the resonance frequency of the cavities and the field distribution of the RF gun are given. Preliminary hot test results show that, the beam current intensity and spot size at the gun output port are over 500 mA and around 3 mm, respectively, and the normalized emittance is 13.5π·mm·mrad, which is obtained with dual-screen measurement. The measured parameters agree well with the theoretical design.
- compact,
- thz source,
- thermionic-cathode rf gun,
- free electron laser

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