太赫兹自由电子装置注入束流输运线的束团有着较长的尾部。在束团尾部能散较大的粒子由输运线中的能量狭缝加以剔除,仅保留头部满足出光要求的粒子输入波荡器。利用Elegant的模拟计算表明在目前采用的输运线设计可以将束团有效部分的粒子完整地传输至波荡器。输运线所采用的磁铁的加工和安装误差会导致束流轨道的畸变,需要利用校正磁铁对束流的偏移加以校正。利用AT for MATLAB仿真计算结果表明,合理选择校正线圈的布局可以有效地校正束流偏差。
A new type of compact terahertz (THz) radiation source using free electron laser (FEL) is discussed in this paper.The concept machine consists of an independently tunable cell thermionic RF gun (ITC-RF Gun),an accelerating structure with symmetry RF-incoupler and a coaxial load RF-outcoupler,an undulator combined with an optical resonance cavity of hole-coupling mode.Withoutα-magnet and other bunch compressors,the size of this machine is decreased.The conceptual design and numerical simulation are presented.
