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| Design of a Single-anode Magnetron-injected-gun for the 3mm GYRO-TWT Amplifiers |
| Yin Rui-jian①②; Liu Pu-kun① |
| ①Institute of Electronics, Chinese Academy of Science, Beijing 100080, China; ②Graduate University of Chinese Academy of Science, Beijing 100039, China |
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Abstract A single-anode electron gun is designed and simulated according to the requirements of the gyrotron traveling wave amplifier. Firstly，the initial parameters for example the cathode angle, the cathode emitter strip and the distance between cathode and mod-anode are designed based on analytic trade-off equations. Secondly，the final beam parameters are determined with the electron trajectory code EGUN. The results reveal that when the accelerated voltage is 70kV and the beam current is 4.55A, electron gun has the axial velocity spread of 2.4%, and the ratio of the transverse velocity to the axial velocity is equal to 1.0, which can satisfy the requirement of the low electron beam velocity spread in the gyrotron traveling wave amplifier.
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Received: 29 November 2006
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2008, Vol. 30 
