【摘要】 介绍了一台设想用于20MeV,3kA,60ns平顶的高亮度电子直线感应加速器的两个试验腔的设计和检测结果。两腔长度均为425 mm,加速间隙宽19.2 mm,并由放在油中(MODⅠ)或真空中(MODⅡ)的铁氧体磁芯、弯曲不锈钢电极隙、带有两对校正线圈的束输运螺线管、电压和电流探测器、绝缘环(MODⅠ)构成。检测结果表明,MODⅠ腔可以得到250kV,74ns平顶(±1％)或300kV、70ns平顶的加速电压脉冲,而MODⅡ可获得250kV,62ns平顶或300 kV,59 ns平顶的脉冲。双线法测得MODⅠ的横向耦合阻抗(568±20％)Ω/m,MODⅡ为(844±20％)Ω/m。脉冲紧线法测得两试验腔的磁轴相对机械轴的偏心和倾斜分别为0.1 mm和1.0 mrad。对腔设计中的关键技术也作了简要介绍。更多还原

【Abstract】 The prototype cell design and test for an induction linac are presented. The two prototype cells, which are expected to operate at 250 kV and supposed to be used for a 20 MeV, 3 kA, 60 ns flattop high-brightness electron beam accelerator, both have the same length (gap-gap) of 425 mm and gap width of 19.2 mm, and are composed of a ferrite core immersed in oil (MOD I) or in vacuum (MOD II), an gap with curved stainless steel electrods, a solenoid magnet with two dipole coils, and finally a insulator in MOD I . The experimental tests indicated that the accelerating voltage pulses of 250 kV with 74 ns flattop (+1%) or 300 kV with 70 ns flattop can be obtained with MOD I and 250 kV with 62 ns or 300 kV with 58 ns with MOD II, and that the transverse impedance are (568+20%) n/m (MOD I ) and (844+20%) n/m (MOD II) measured by biwire method while the tilt and offset of the magnetic alignment are 1.0 mrad and 0.1 mm measured with pulsed taut wire technique. The key points in the cell design are introduced briefly.更多还原