• K. Shinto
  JAEA, Rokkasho, Kamikita, Aomori
• O. Kaneko, M. Nishiura, K. Tsumori
  NIFS, Gifu
• M. Kisaki, M. Sasao
  Tohoku University, School of Engineering, Sendai
• M. Wada
  Doshisha University, Graduate School of Engineering, Kyoto

We propose a negative ion beam probe system as a new scheme to diagnose beam profile of high power positive ion beams. Two RF linacs of IFMIF have to drive the neutron source by providing continuous-wave (CW) positive deuterium ion beams with the intensity of 125 mA each at the beam energy of 40 MeV. During the CW beam operations, the extreme intensity of the beam and the severe radiation levels make the beam diagnostics with conventional techniques in the transport lines terribly difficult. A beam of negative ions liable to lose the additional electron at the occasion of impact with a high energy particle can work as a probe to measure the positive ion beam profile. On possible configuration to achieve high intensity beam profile measurement is to inject a negative ion probe beam into the target beam perpendicularly, and measure the attenuation of the negative ion beam by beam-beam interaction at each position. We have started an experimental study for the proof-of-principle of the new beam profile monitoring system. The paper presents the status quo of this beam profile monitor system development and the prospects to apply the system to the IFMIF beam line controls.

• 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.

• Ch. Vermare, P. Garin, H. Shidara
  IFMIF/EVEDA, Rokkasho
• P.-Y. Beauvais, A. Mosnier
  CEA, Gif-sur-Yvette
• A. Facco, A. Pisent
  INFN/LNL, Legnaro (PD)
• R. Heidinger
  Fusion for Energy, Garching
• A. Ibarra
  CIEMAT, Madrid
• H. Kimura, S. Maebara, S. O'hira, Y. Okumura, K. Shinto, H. Takahashi
  JAEA, Ibaraki-ken

In the frame of the IFMIF/EVEDA project, a high-intensity (125 mA) CW deuteron accelerator will be installed and commissioned at the Rokkasho's Broader Approach (BA) site. The main objective of this 9 MeV prototype is to provide information on the feasibility of the design, the manufacturing and the operation of the two linacs (up to 40 MeV) foreseen for IFMIF*. Based on the requirements for each System (Accelerators, Lithium target and Tests Facility) which are deduced from the IFMIF fusion material irradiation requirements, given by the users, the objectives of this accelerator prototype are defined and presented here. Also, because of the distributed nature of the design work and the procurement of the accelerator, organization of the installation and commissioning phase is essential. The installation and commissioning schemes, the organization proposed and the overall plans are presented.

*IFMIF International Team, IFMIF Comprehensive Design Report (CDR) 2003.