TY - CONF AU - Chambrillon, J.K. AU - Bazin, N. AU - Cara, P. AU - Carin, Y. AU - Chauvin, N. AU - Duglue, G. AU - Dzitko, H. AU - Ebisawa, T. AU - Gex, D. AU - Hasegawa, K. AU - Jimenez-Rey, D. AU - Kako, E. AU - Kondo, K. AU - Masuda, K. AU - Mollá, J. AU - Möller, W.-D. AU - Phillips, G. AU - Podadera, I. AU - Sakai, H. AU - Scantamburlo, F. AU - Sugimoto, M. AU - Yanagimachi, T.Y. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Schaa, Volker R.W. ED - Thomas, Paul W. TI - Cleanroom Assembly of the LIPAc Cryomodule J2 - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023 CY - Grand Rapids, MI, USA T2 - International Conference on RF Superconductivity T3 - 21 LA - english AB - In complement to the development activities for fusion reactors (JT-60SA & ITER), Fusion for Energy contributes to the R&D for material characterisation facilities. LIPAc is the technical demonstrator for the production and acceleration of a D⁺ beam that will be used for neutron production by nuclear stripping reaction on a liquid Li target. Since its first beam in 2014, the LIPAc construction and commissioning continues and will be concluded with the cryomodule installation, aiming for beam validation at nominal power. The cryomodule assembly, started in March 2019, was paused due to welding issues on the solenoid bellows. The slow pumping group used for the cleanroom assembly also needed improvement to overcome helium contamination. Two and half years were devoted to the pumping improvement and, repair, cold tests and high pressure rinsing of the solenoids. In August 2022, the cleanroom assembly resumed with the mounting of all power couplers to the SRF cavities. Despite good progress, the assembly had to be paused again to fix leaks on different vacuum components and a solenoid BPM port. This paper presents the issues faced and their solutions along the cold mass assembly. PB - JACoW Publishing CP - Geneva, Switzerland SP - 452 EP - 457 KW - solenoid KW - SRF KW - cavity KW - cryomodule KW - pick-up DA - 2023/09 PY - 2023 SN - 2673-5504 SN - 978-3-95450-234-9 DO - doi:10.18429/JACoW-SRF2023-TUPTB027 UR - https://jacow.org/srf2023/papers/tuptb027.pdf ER - TY - CONF AU - Ebisawa, T. AU - Carin, Y. AU - Chambrillon, J.K. AU - Chauvin, N. AU - Dzitko, H. AU - Gex, D. AU - Hasegawa, K. AU - Kako, E. AU - Kasugai, A. AU - Kondo, K. AU - Masuda, K. AU - Phillips, G. AU - Sakai, H. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Schaa, Volker R.W. ED - Thomas, Paul W. TI - Operational Consideration in the LIPAc SRF with Potential Solenoid Failure Modes J2 - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023 CY - Grand Rapids, MI, USA T2 - International Conference on RF Superconductivity T3 - 21 LA - english AB - The commissioning of LIPAc (Linear IFMIF Prototype Accelerator) is ongoing at Rokkasho institute of QST for the engineering validation of the accelerator system up to 9 MeV/125 mA. Several SRF cryomodules will be required for IFMIF to accelerate deuterons from 5 MeV to 40 MeV. The prototype of the first of these cryomodules has been manufactured and will be installed and tested on the LIPAc. It holds the eight HWRs (Half Wave Resonator) and RF couplers to accelerate the beam and the eight superconducting solenoids to focus it. During the solenoid HPR process, carried out after fixing welding issues on the solenoid beam line bellows, some concerns appeared about the integrity of two solenoids. The examination with CT scanning of the solenoids revealed that one screw and a few pins had leaved their socket. Although it should be no critical problem, we tried the beam simulation with PIC code TraceWin to determine the location of solenoids whose impact will be minimized to manage in case of failure of solenoid as mitigation action. This paper presents the recommended locations of the suspicious solenoids in the cryomodule and resultant beam conditions through the beam dynamics study. PB - JACoW Publishing CP - Geneva, Switzerland SP - 467 EP - 470 KW - solenoid KW - SRF KW - simulation KW - operation KW - cryomodule DA - 2023/09 PY - 2023 SN - 2673-5504 SN - 978-3-95450-234-9 DO - doi:10.18429/JACoW-SRF2023-TUPTB031 UR - https://jacow.org/srf2023/papers/tuptb031.pdf ER - TY - CONF AU - Ebisawa, T. AU - Hasegawa, K. AU - Kako, E. AU - Kasugai, A. AU - Oyaidzu, M. AU - Sakai, H. AU - Sato, S. AU - Umemori, K. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Schaa, Volker R.W. ED - Thomas, Paul W. TI - Basic Design and Consideration of Li-Vapor Contamination for A-FNS SRF J2 - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023 CY - Grand Rapids, MI, USA T2 - International Conference on RF Superconductivity T3 - 21 LA - english AB - The Advanced Fusion Neutron Source (A-FNS) project is in progressing in Japan, QST Rokkasho institute. A-FNS will demonstrate a performance of the DEMO DT fusion reactor material. In order to perform the test, a high intensity deuteron beam accelerator will be used to produce a high flux neutron field which is similar to the 14 MeV DT neutron. The Superconducting Radio-Frequency linear accelerator (SRF) is one component of the A-FNS accelerator system. Although the A-FNS accelerator system design is based on the IFMIF design, the improvement of some subsystem has been considering by taking into account the lessons learnt from the LIPAc project. In order to keep a high stability and availability of the SRF performance, we plan to increase the number of SRF cavities and cryomodules considering the trouble or degradation of the cavity performance and modify the engineering design of some components. In addition, changing of the beam transport line design and Li vapor contamination study of SRF cavity are conducting. In this presentation, the progress of the SRF design and related activities for A-FNS in QST will be presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 773 EP - 777 KW - SRF KW - cavity KW - solenoid KW - linac KW - operation DA - 2023/09 PY - 2023 SN - 2673-5504 SN - 978-3-95450-234-9 DO - doi:10.18429/JACoW-SRF2023-WEPWB083 UR - https://jacow.org/srf2023/papers/wepwb083.pdf ER -