电子枪可以实现电子束能量扫描。
为提高实验用电子束能量，将原光学速调管的对称结构改造为不对称结构。
To increase the electron beam energy for experiment, the symmetrical configuration of optical klystron is shifted to nonsymmetrical configuration.
同时还指出，预群聚有在不增加电子束能量情况下缩短激光波长和降低对电子束质量要求等作用。
It is also indicated that prebunching can short the laser wavelength without increasing the electron beam energy and relieve the requirement on the electron beam quality.
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