A newly constructed quasi-periodic APPLE-II undulator was installed in the HiSOR ring at Hiroshima Synchrotron Radiation Center, Hiroshima University during the summer shutdown period in 2011. This 1.8 m-long undulator has a period length of 78 mm. In this article, the mechanism of magnetic field generation for various polarization modes of APPLE undulator, the principle of quasi-periodic undulator, and the performance of HiSOR QP-APPLE-II undulator are described.

The Great East Japan Earthquake has caused several damages on the electron accelerators and instruments at the AIST electron accelerator facility. This report describes the situation of damages and recovery efforts. Furthermore, activities of radiation measurements for the radioactive material released by the accident of the Fukushima nuclear plant are reported.

The 12UD Pelletron tandem accelerator at the University of Tsukuba suffered serious damage from the Great East Japan Earthquake on 11 March 2011. On the day, the 12UD Pelletron tandem accelerator was in operation at 8 MV. The electricity supply went out during the earthquake. Fortunately, there were no casualties by the earthquake in the facility. However, all high voltage accelerating columns fell down in the accelerator tank. We decided to shut down the 12UD Pelletron tandem accelerator. At present, we have a plan to install a new middle-sized tandem accelerator instead of the broken 12UD Pelletron tandem accelerator at the 2nd target room connecting the beam line to existing facilities at the 1st target room. The construction of the new accelerator system will be completed by spring 2014.

The SAGA Heavy Ion Medical Accelerator project in Tosu (SAGA-HIMAT) is promoted by Saga prefecture with private financial supports, investments, and also personal donations. With this funding, facility construction is conducted by a collaboration of a SAGA-HIMAT foundation and a SAGA-HIMAT company. The facility is under construction in Tosu-shi near Shinn-Tosu Shinkansen station, which has easy access from the Kyushu island area and also south west Japan. In the facility, there are three treatment rooms, where the first one has been equipped with horizontal and 45 degree oblique beam lines, the second one has horizontal and vertical beam lines, and the third one is for future preparation of a spot scanning irradiation system. The design of the accelerator itself is almost the same as a therapy facility at Gunma University, i.e., accelerated ion is carbon, maximum beam energy is 400 MeV/u, and maximum beam intensity is 1.3×10⁹ pps. The injection line to the synchrotron and transport lines to the three treatment rooms have been rearranged. Design of the accelerator and an irradiation system started at the beginning of 2010, and the construction of the facility building has started at the beginning of 2011. Installations of accelerator devices have started at beginning of 2012, and the facility is planned to complete in 2013. In this paper, we present our project and current status of the facility construction.

The J-PARC main ring synchrotron (MR) has started users operation since 2009. The MR has two beam extraction systems. One is a fast extraction system for beam delivery to the neutrino beam line of the Tokai-to-Kamioka (T2K) experiment. Other is a slow extraction system for beam delivery to the hadron experimental hall. After nine-month beam shutdown caused by the Great East Japan Earthquake, the J-PARC facility resumed beam operation since December 2012. The MR delivers the 150 kW beam to the T2K experiment and 3-5 kW beam to users in the hadron experimental hall. In this paper, status of the MR high power beam operation is presented. Some improvements planned in near future for the beam intensity upgrade are also discussed.