An emittance measurement device for a space-charge dominated electron beam

Beam emittance is one of the most important parameters for electron sources. To investigate the beam emittance of the 3.5-cell DC-SC photocathode injector developed at Peking University, a multi-slit emittance measurement device has been designed and manufactured. The designed slit width, mask thick...

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Bibliographic Details
Published in:Chinese physics C 2012-09, Vol.36 (9), p.867-870
Main Author: 王文静 黄森林 全胜文 林林 刘克新
Format: Article
Language:English
Subjects:
Beams (radiation)
Devices
Electron beams
Electron sources
Emittance
Injectors
Photocathodes
Slits
光阴极注入器
北京大学
发射度
发射率
控制
测量装置
电子束
空间电荷
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Summary:Beam emittance is one of the most important parameters for electron sources. To investigate the beam emittance of the 3.5-cell DC-SC photocathode injector developed at Peking University, a multi-slit emittance measurement device has been designed and manufactured. The designed slit width, mask thickness and beamlet drift length are 100 ~m, 3 mm and 430 mm respectively. It is suitable for the electron beam with energy of about 5 MeV and the average current less than 0.1 mA. The preliminary measurement result of the rms emittance of the electron beam produced by the DC-SC injector is about 5 7 mm.mrad.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/36/9/013