INTENSE COMPTON GAMMA-RAY SOURCE FROM THE DUKE STORAGE-RING FEL

A 1.1 GeV electron storage ring dedicated for UV-VUV FEL operation was commissioned last year at the Duke University Free Electron Laser Lab oratory (DFELL) [1]. The OK-4 FEL was shipped to Duke from Novosibirsk earlier this year and is in the process of installation. The high ave rage intracavity power and natural synchronization of electron and opt ical pulses in the OK-4 FEL will allow the production of intense beam of inverse Compton 5-150 MeV gamma-rays. The projected brightness of t his gamma-ray source will allow the attainment of high energy resoluti on by simple geometrical collimation. The wide tunability of the OK-4 FEL will also provide for continuous tuning of the gamma-rays energy. In this paper we discuss the influence of beam parameters on the gamma -ray energy spread and projected performance of the Duke/OK-4 inverse Compton gamma-ray source. A detailed description of this study could b e found in Ref. [2].