Author/Authors :
Yokoyama، نويسنده , , M. and Sei، نويسنده , , N. and Kawai، نويسنده , , M. and Yamada، نويسنده , , K. and Hamada، نويسنده , , S. and Sugiyama، نويسنده , , S. and Ohgaki، نويسنده , , H. and Mikado، نويسنده , , T. and NOGUCHI، نويسنده , , T. Uchikoshi T. S. Suzuki Y. Sakka، نويسنده , , R. and Chiwaki، نويسنده , , M. and Yamazaki، نويسنده , , T.، نويسنده ,
Abstract :
We have simulated the effects of a 6.3-m optical klystron (OK) on the electron beam in the compact storage ring NIJI-IV dedicated to free-electron lasers (FELs) by using the exact treatment of the transfer matrices of the OK. It was found that the focusing force of the OK produced distortion of betatron functions and cuts along resonance lines in the stability region in the betatron-tune diagram. Some of the results derived from the simulations were in reasonable agreement with experimental results. The method of simulation has thus proved to be quite effective in finding a good operating condition of a ring for satisfactory FEL performance especially in the case of a compact storage ring like the NIJI-IV with a long insertion device.
