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- J. Marroncle, P. Abbon, B. Bolzon, T. Chaminade, N. Chauvin, S. Chel, J.F. Denis, A. Gaget
CEA-DRF-IRFU, France
- T. Akagi, K. Kondo, M. Sugimoto
QST, Aomori, Japan
- L. Bellan, M. Comunian, E. Fagotti, F. Grespan, A. Pisent, F. Scantamburlo
INFN/LNL, Legnaro (PD), Italy
- P. Cara
IFMIF/EVEDA, Rokkasho, Japan
- H. Dzitko, D. Gex, A. Jokinen
F4E, Germany
- J.M. García, D. Jiménez-Rey, A. Ros, V. Villamayor
CIEMAT, Madrid, Spain
- A. Rodríguez Páramo
ESS Bilbao, Zamudio, Spain
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IFMIF (International Fusion Materials Irradiation Fa-cility) is an accelerator-driven neutron source aiming at testing fusion reactor materials. Under the Broader Ap-proach Agreement, a 125 mA / 9 MeV CW deuteron accelerator called LIPAc (Linear IFMIF Prototype Accel-erator) is currently under installation and commissioning at Rokkasho, Japan, to validate the IFMIF accelerator. During the beam commissioning at 5 MeV which started in June 2018, the horizontal and vertical transverse emit-tance of a 2.5 MeV proton beam have been measured downstream of the RFQ for different machine configura-tions. Such measurements were done with an emittance measurement unit composed of slits defining a beamlet of 200 µm width, then of steerers and finally of a SEM grids monitor. In this paper, the process and the system are first described. The secondary electron emission of SEM-Grid wires is then estimated based on measure-ments and results are close to the usual rule of thumb. Finally, emittance measurements are presented and comparisons with beam dynamics simulations show good agreement.
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