SPACE CHARGE EFFECT FOR ROTATION OF LONGITUDINAL PHASE SPACE IN ALPHA MAGNET
SPACE CHARGE EFFECT FOR ROTATION OF LONGITUDINAL PHASE SPACE IN ALPHA MAGNET
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发表时间：
2010
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通讯作者：
H. Hama
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作者：
H. Hama
在紧凑型直线加速器系统中，组合使用双光子RF枪和α（）磁体似乎对于产生亚皮秒聚束长度非常有效[1]。在这种聚束压缩方案中，磁体对控制粒子在纵向相空间中的分布起着重要的作用。然而，空间电荷效应以及在磁铁尾场还没有得到很好的研究。我们讨论了磁内耦合的纵向和横向相空间中粒子分布的显著畸变，通过使用时域有限差分（FDTD）方法求解时间相关的麦克斯韦方程组进行数值模拟[2]。
Combined use of thermionic RF gun and alpha ( ) magnet seems to be very much effective for production of sub-picosecond bunch length in a compact linac system [1]. In this bunch compression scheme, the -magnet plays a significant role for controlling particle distribution in the longitudinal phase space. However space charge effects as well as wakefields in the magnet have not been well studied. We discuss significant distortion of the particle distribution in both the longitudinal and the transverse phase spaces, which are coupled in -magnet, by showing numerical simulations employing finite difference time domain (FDTD) method to solve time-dependent Maxwell’s equations [2].