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3.5 MeV注入器是“神龙一号”直线感应加速器的束源,在注入器束流调试中,首先通过数值模拟方法,初步确定束流过聚焦和聚焦不足两种极端情况下引出线圈输运磁场峰值的变化范围;然后以注入器出口束流波形为参考,通过实验调试找到了这两种情况下引出线圈输运磁场峰值的实际配置;再通过测量束流的剖面或发射度,在这两种配置中选定一个折中的引出线圈磁场配置,并最终确定了注入器输运磁场的总体配置。经过调试完成后的注入器束流为3.6 MeV,流强为2.8 kA,归一化边发射度为1040 mm.mrad,达到了预期的指标。
3.5 MeV injector is the beam source of the “Shenlong-1” linear induction accelerator. In the debugging of the injector beam, the magnetic field of the coil is mainly determined by the numerical simulation method under the two extreme cases of beam focusing and insufficient focusing Then the variation range of the peak value is obtained. Then based on the injector exit beam waveform, the actual configuration of the peak value of the magnetic field of the delivery coil in these two cases is found through experimental debugging. By measuring the beam profile or the emissivity, Select a compromise in the configuration of the output coil magnetic field configuration, and ultimately determine the overall configuration of the injector transport magnetic field. After commissioning, the injector beam current was 3.6 MeV, the flow rate was 2.8 kA, and the normalized edge emission was 1040 mm.mrad, reaching the expected target.