Present status of laser undulator compact x-ray source (LUCX) (5)

We have developed a compact X-ray source via inverse Compton scattering between an electron beam and a laser pulse stacked in an optical super-cavity at Laser Undulator Compact X-ray (LUCX) accelerator in KEK. The accelerator consists of a photo-cathode RF-gun and an S-band accelerating tube and now produces the multi-bunch electron beam with 100 bunches, 0.5nC bunch charge and 40MeV beam energy. However, some problems became clear in this experiment. It is planned to upgrade the RF-gun and the RF system of the accelerator and the super-cavity in order to resolve them and also increase the X-ray yield. The new RF-gun with high mode separation and high Q value has already introduced. A new klystron for the gun has also been installed to provide good compensation with a high-intensity multi-bunch electron beam. Furthermore, we have tried to demonstrate the X-ray generation with new RF synchronization system which adopted the reference signal of the cavity laser as a master oscillator. In this paper, the status and future plan of this accelerator will be reported. (author)