PRELIMINARY-RESULTS OF THE FEL INJECTOR AT CIAE

For purposes of scientific research, an L-band FEL injector was propos ed at the China Institute of Atomic Energy (CIAE) some time ago [X.L. Zhai et al., Nucl. Instr. and Meth. A296 (1990) 684]. It consists of a n electron gun, one subharmonic buncher (108 MHz), a fundamental bunch er (1300 MHz), an accelerating section. a microwave power source and d iagnostic devices. The design goal was to produce electrons at an ener gy of 20 MeV at a micropulse current of up to 50 A and a micropulse le ngth of 10-20 ps. Now the injector (including the buncher) is complete and testing is under way. This paper describes preliminary results an d reports the status of the injector.