100 keV回旋电子束参数测量
Parameters measurement of 100 keV gyral electron beam
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摘要: 利用电子束轰击快响应荧光屏获得电子束横截面图像的方法，对100 keV大回旋轨道空心电子束(Cusp电子束)在横截面上的束轮廓及电荷密度分布进行了测量，计算出回旋电子束半径、螺旋角等参数，并与相同条件下的计算机数值模拟结果进行了对比和分析。测量结果表明初始磁场强度从0.003 5 T增加到0008 2 T时，电子束的拉莫半径从3.2 mm增加到3.9 mm，螺旋角从0.7增加到1.0，满足使用此电子束的回旋行波放大器的调试需求。Abstract: Charge density distribution of the large-orbit hollow beam, which is applied to a Gyro-TWA, is obtained from time-integrated image. The image is created by a phosphor scintillator on the cross section vertical to the transmission axial. Comparison of average beam radius, beam pitch angle obtained from the images and from computer simulations and the differences were analyzed. The experimental results are consistent with the simulated ones and significant for the debugging of the Gyro-TWA using this gyral electron beam.
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Key words:
- gyral electron beam /
- gyrotron /
- electron beam radius /
- electron beam pitch angle /
- csda range
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