在紧凑型回旋加速器中,磁极间隙及高频D板间隙有限,在CYCIAE-100MeV加速器设计中,磁极的半间隙从小半径的30mm到大半径的24mm,高频D板的半间隙只有20mm,所以很容易在轴向引起束流的损失。引起轴向束流损失的原因包括束团不匹配以及各种误差的存在,同时,随着流强的增加,粒子在轴向的振荡幅度也增加,会有更多的粒子超过轴向的间隙而损失掉。 In the compact cyclotron, the pole gap and high-frequency D plate gap is limited. In the CYCIAE-100MeV accelerator design, the half-gap of the magnetic pole ranges from 30mm of small radius to 24mm of large radius, and the half-gap of high-frequency D plate is only 20mm It is easy to cause the beam loss in the axial direction. The causes of the axial beam loss include bunching mismatch and the presence of various errors. At the same time, as the flow strength increases, the oscillation amplitude of the particles in the axial direction also increases, and more particles will pass the axial clearance And lost.