Publications [#167645] of Ying Wu

Papers Published
  1. B. Jia, J. Li, Y. K. Wu, Experimental study of storage ring FEL output power scaling with electron beam energy spread, Proceedings of 2009 Particle Accelerator Conference (2009), pp. 1248-1250 .

    Ac­cu­rate si­mul­ta­ne­ous mea­sure­ments of stor­age ring free-elec­tron laser (SRFEL) av­er­age power out­put and elec­tron beam en­er­gy spread has been achieved at the Duke FEL Lab­o­ra­to­ry. It is well known that the SRFEL power is lim­it­ed by the elec­tron beam syn­chrotron ra­di­a­tion power and the in­duced en­er­gy spread of the elec­tron beam. The two-wig­gler spec­trum of an op­ti­cal klystron can be used to de­ter­mine the en­er­gy spread of the elec­tron beam. Mea­sur­ing the in­ter­fer­ence pat­tern of the mod­u­lat­ed spon­ta­neous spec­trum with the FEL turned on, we are able to study the FEL power out­put as a func­tion of elec­tron beam en­er­gy spread. As the en­er­gy spread in­creas­es, the mod­u­la­tion in the two-wig­gler spec­trum re­duces, re­sult­ing in a small­er FEL gain. Dur­ing this pro­cess, the op­er­a­tion of an op­ti­cal klystron de­grades back to that of a con­ven­tion­al FEL. This paper re­ports our re­cent ex­per­i­ment study of tran­si­tion of the FEL op­er­a­tion from an op­ti­cal klystron to a con­ven­tion­al FEL.