反磁回路技术诊断2MeV注入器出口处束包络半径

Diamagnetic Loop Diagnoses the 2MeV Injector Beam Radius

反磁回路(Diamagnetic loop,DML)诊断强流脉冲电子束半径的技术是一种可在线诊断的技术．这种诊断技术与其他方法(如三梯度法)相配合可以同时在线诊断强流脉冲电子束的发射度、束包络斜率等参数．介绍了反磁回路诊断电子束时间分辨均方根半径的原理,并建立了相应的装置,通过标定给出了定标系数．利用反磁回路诊断装置测量了2MeV直线感应型注入器出口处双脉冲强流电子束包络的均方根半径分别为6．84mm和5．63mm,和用分幅相机同步测量的结果具有较好的一致性．

The technology of diamagnetic loop (DML) diagnosing intense pulse beam radius is a kind of on-line diagnostics. The technologies can diagnose beam emittance and obliquity on-line cooperating with other technologies such as three gradients method. In this paper, we introduce the theory of diamagnetic loop, design and calibrate diamagnetic loop device. And we diagnose the double pulse electron beams radius generated by the 2MeV injector. By the DML, the double beams radii are 6.84mm and 5.63mm, which are accordant with the results of a frame camera.