LELIA: An induction linac developed for FEL application

An induction linac is being studied and built at CESTA for FEL application. At first the authors studied the induction technology and namely the high voltage (HV) generators and the induction cells. A HV generator designed to feed the cells with calibrated pulses (150 kV, 50 ns, ΔV/V < 1%) has been built using a charging resonant system and magnetic switches. This generator is planned for kHz repetition rate operation. A prototype induction cell has also been built and tested with a cable generator. An electron injector (1.5 MeV, 1.5 kA) has been designed and is now under completion: it uses ten induction cells and a thermionic dispenser cathode. Numerical codes have been developed and simulations have been compared with experimental results for HV generators, induction cells and a thermionic dispenser cathode. Numerical codes have been developed and simulations have been compared with experimental results for HV generators, induction cells and injector. An indication accelerating module is now being studied and the authors plan to have the accelerator working next year at a 3 MeV energy level