A preliminary design of a permanent magnet focused IH type drift tube linac cavity
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摘要: 设计了一个用于加速低能质子的永磁聚焦IH型漂移管加速腔。通过迭代设计，使得束流通过每个漂移管中心的束流相位与预设值一致。设计的永磁聚焦IH型漂移管加速腔将质子束从0.75 MeV加速到2.5 MeV，长度0.96 m，分流阻抗约90 M/m。不考虑束晕和误差因素，50 mA流强下该漂移管加速腔中的束流损失可以控制在0.1%量级。Abstract: A permanent magnet focused IH type drift tube linac (IH-DTL)cavity was designed for accelerating low energy proton. Using adaptive dimension adjustment, the beam phase at the center of every drift tube was adjusted to be equal to the set value. The IH-DTL designed in this paper has a length of 0.96 m and a shunt impedance of about 90 M/m, it can accelerate protons from 0.75 MeV to 2.5 MeV. The beam envelope in the IH-DTL was computed by the program TRACE3D. If the beam halo and errors were neglected, the beam loss can be controlled to be approximately 0.1% when the beam current is 50 mA.
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Key words:
- IH mode /
- drift tube linac /
- permanent magnet focused /
- shunt impedance /
- proton
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