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| THPMN042 |
Design of a 200keV High Pulse Current Electron Beam Facility
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2811 |
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- G. Feng, Y. Hong, Y. J. Pei, X. Wang
USTC/NSRL, Hefei, Anhui
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In the paper, design of a 200keV high pulse current electron beam facility is introduced, which is used to generate plasma by interaction between electron beam and gas. Physical parameters of the beam have been selected to satisfy the plasma experiment's need. LaB6 is chosen as cathode because of its high efficient emission and long lifetime. Temperature distribution simulation in the facility has been finished with I-deas code. Because the maximum working temperature in the system is 2400°C, grid is made of heat-resistant metal Mo. In order to get high pulse current and line shaping electron beam, shape of electrodes has been optimized. Electric field distribution in the system and process of electron beam emission have been simulated with opera-3d, which considering space charge effects. Ceramic flange's electrics and mechanics properties have also been analyzed. Metal foil window is made of titanium with 40μm thickness. Relationship between initial energy and energy loss of the electron beam has been obtained by MC simulation during passing through the window. Making of the facility has been finished and some parameters have been measured through testing experiments.
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