• H. Takahashi, T. Kojima, S. Maebara, T. Narita, H. Sakaki, K. Tsutsumi
  JAEA, Rokkasho, Kamikita, Aomori

Control System for IFMIF/EVEDA accelerator prototype consists of the six subsystems; Central Control System (CCS), Local Area Network (LAN), Personnel Protection System (PPS), Machine Protection System (MPS), Timing System (TS) and Local Control System (LCS). The subsystems have been designed and their test benches been fabricated at JAEA. The IFMIF/EVEDA accelerator prototype provides a deuteron beam with the power more than 1 MW, which is as same as that in cases of J-PARC and SNS. In the control system, MPS and TS with high performance and precision are strongly required to avoid the radio-activation of the accelerator components. The prototypes of the MPS and TS are testing in conjunction with the injector test starting at CEA/Saclay from autumn in 2010. These results will feedback the design and the fabrication of the control components. This paper presents the development status of the TS modules and EPICS drivers for TS and MPS, and the prospects to apply them to the Injector test.

• A. Mosnier, P.-Y. Beauvais, R. Gobin, J.-F. Gournay, P. Joyer, J. Marroncle, P.A.P. Nghiem, F. Orsini
  CEA, Gif-sur-Yvette
• B. Brañas, A. Ibarra, P. Méndez, I. Podadera Aliseda, J. Sanz, F. Toral
  CIEMAT, Madrid
• M. Comunian, A. Facco, A. Palmieri, A. Pepato, A. Pisent
  INFN/LNL, Legnaro (PD)
• P. Garin, Ch. Vermare
  IFMIF/EVEDA, Rokkasho
• R. Heidinger
  Fusion for Energy, Garching
• H. Kimura, T. Kojima, T. Kubo, S. Maebara, S. O'hira, Y. Okumura, K. Shinto, H. Takahashi, K. Yonemoto
  JAEA, Aomori

The objectives of the IFMIF/EVEDA project are to produce the detailed design of the entire IFMIF facility, as well as to build and test a number of prototypes, including a high-intensity CW deuteron accelerator (125 mA @ 9 MeV). Most of the accelerator components (Injector, RFQ, Superconducting RF-Linac, Transport Line and Beam Dump, RF Systems, Local control systems, beam instrumentation) are designed and provided by European institutions (CEA/Saclay, CIEMAT, INFN/LNL, SCK-CEN), while the RFQ couplers, the supervision of the control system and the building including utilities constructed at Rokkasho BA site are provided by JAEA. The coordination between Europe and Japan is ensured by an international project team, located in Rokkasho, where the accelerator will be installed and commissioned. The design and R&D activities are presented, as well as the schedule of the prototype accelerator.

• S. Okuda, T. Kojima, R. Taniguchi
  Osaka Prefecture University, Sakai

The coherent synchrotron and transition radiation from the bunched electron beams of a linear accelerator (linac) has continuous spectra in a submillimeter to millimeter wavelength range at relatively high peak-intensity. The coherent radiation has been applied to absorption spectroscopy for various kinds of matters. However, the number of such light sources are very small. A new pulsed coherent transition radiation light source has been established by using the electron beams of a 18 MeV S-band electron linac at Osaka Prefecture University (OPU). In the linac pulsed electron beams are injected from a thermionic triode gun with a cathode-grid assembly at pulse lengths of 5 ns-4 μs at a pulse repetition rate of 500 pulses/s in maximum. The light source will be also applied to the pump-probe experiment using the pulsed electron beam or the pulsed coherent radiation as a beam for pumping matters and the coherent radiation for probing them. The transient properties of the matters excited with the electron beams or the coherent radiation will be investigated. The characteristics of the light source are reported.