Author/Authors :
Zhang، نويسنده , , Tong and Deng، نويسنده , , Haixiao and Chen، نويسنده , , Jianhui and Dai، نويسنده , , Zhimin and Feng، نويسنده , , Chao and Feng، نويسنده , , Lie and Lan، نويسنده , , Taihe and Liu، نويسنده , , Bo and Wang، نويسنده , , Dong and Wang، نويسنده , , XingTao and Zhang، نويسنده , , Meng and Zhang، نويسنده , , Miao، نويسنده ,
Abstract :
In this paper, a fully coherent radiation option with controllable polarization is proposed for the Shanghai deep ultraviolet free electron laser (FEL) test facility. Intensive start-to-end simulation suggests that the two crossed planar undulators which generate the horizontal and vertical linear polarized FEL, should be placed as close as possible for avoiding the polarization performance degradation of the final combined FEL radiation. With the existence of the phase-shifter between the two crossed radiators, Fourier-Transform-Limited output radiation with 100 nJ order pulse energy, 5 ps full pulse length and circular polarization degree above 90% could be achieved.
Keywords :
Crossed undulator , FEL , Circular polarization , Slippage
