Status, damages due to the earthquake, recovery and new projects are described at the linac/laser facility of Nuclear Professional School, University of Tokyo. The twin linacs themselves fortunately came off with no serious damage, but many diagnostic devices were heavily destructed. One of the two elelctrostatic ion accelerators was heavily damaged. We decided to replace it with the 1.7 MeV accelerator from Asano campus. The governmental recovery budget was approved in the fall, 2011. We have started the open use of the twin linac. Na₅KNb exchangeable photocathode is under self-development collaborated with JAEA. The cathode fabrication device was also damaged, but it is almost recovered. X-band(11.424 GHz) 30 MeV linac for Compton scattering monochromatic X-ray source was approved officially by the government last autumn. After repairing its vacuum system and alignment, we are going to move the thermionic RF gun near the accelerating tube and restart the experiment. Portable X-band(9.3 GHz) 950 keV second linac and 3.95/6 MeV linacs remained almost undamaged. Transmission nondestructive test of thermal-shielded-pipe used at petrochemical complex and PC(Pre-stressed Concrete) for bridges are under way by the 950 keV and 3.95 MeV linacs, respectively. The third machine of 6 MeV linac X-ray source has been installed and under testing. We have already shipped the 12 TW 50 fs laser to KEK for more varieties of uses. We are developing a new femtosecond fiber laser for a new photonic crystal on-chip accelerator. The on-chip accelerator for fundamental radiation biology is under design. Another femtosecond fiber laser is going to be installed as a new oscillator for the laser driver of the photocathode RF injector of the S-band linac. Our fast neutron experimental reactor, Yayoi, was officially shut downed in March, 2011. We plan to reuse its infrastructure with accelerator-based neutron sources. New experimental exercise program is also introduced.

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, an S-band accelerating tube and a part of X-ray generation. In the autumn of last year, we have succeeded in taking X-ray images of fish bone and etc. However, it had taken two hours to get an X-ray image because of low intensity of X-ray with the number of 10⁴ photons/train. In order to obtain a clear X-ray image in a shorter period of time, we are planning to increase the intensity of X-ray to 450 times. To achieve this aim, the number of electron bunches is extended to 1000 bunches/train and the stacked laser power in the optical cavity is increased to 15 times. In order to avoid the mirror damage, the laser spot size on the mirror will be expanded by lengthening the distance between mirrors. Moreover, the collision angle is reduced from 20° to 7.5°. By carrying out these improvements, the expected number of X-ray photons will increase to 1.7×10⁷ photons/train. In this upgrade, a 3.6 cell rf-gun, a 12 cell booster and a planner type four-mirror cavity will be newly installed. In this paper, the experimental results of X-ray imaging in last autumn and the upgrade plan of the LUCX accelerator will be reported.

EPICS is the software toolkit to create control systems for scientific instruments such as accelerators. In this article, introductory review of EPICS for beginners is presented. Recent developments and activities in the EPICS collaboration are also reported.