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Title	Beam Physics and Technical Challenges of the FRIB Driver Linac
Authors	Y. Yamazaki, H. Ao, N.K. Bultman, F. Casagrande, C. Compton, K.D. Davidson, A. Facco, F. Feyzi, P.E. Gibson, T. Glasmacher, Z.Q. He, L.T. Hoff, K. Holland, M. Ikegami, S.M. Lidia, Z. Liu, G. Machicoane, F. Marti, S.J. Miller, D. Morris, J. Popielarski, L. Popielarski, G. Pozdeyev, T. Russo, K. Saito, S. Shanab, G. Shen, S. Stark, H. Tatsumoto, R.C. Webber, J. Wei, T. Xu, Y. Zhang, Q. Zhao, Z. Zheng FRIB, East Lansing, Michigan, USA K. Dixon, V. Ganni JLab, Newport News, Virginia, USA A. Facco INFN/LNL, Legnaro (PD), Italy K. Hosoyama, M. Masuzawa, K. Tsuchiya KEK, Ibaraki, Japan M.P. Kelly, P.N. Ostroumov ANL, Argonne, Illinois, USA R.E. Laxdal TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
Abstract	The FRIB driver linac accelerates all the stable ion beams including uranium over 200 MeV/u with a CW beam power of 400 kW in order to produce isotopes as rare as possible. Except for 0.5 MeV/u RFQ, the linac is making use of superconducting (SC) RF technology. The beam power, which is an order of 2.5 as high as those of existing SC heavy ion linac, gives rise to many technical challenges as well as beam physics related ones. In particular, the uranium beam loss power density is approximately 30 times as high as the proton one with the same beam energy per nucleon and the same beam power. For this reason, the machine protection system needs a special care. Another example of the technical challenges is to install beam focusing solenoid as close as possible to SC cavities in order to ensure the frequent beam focusing both longitudinally and transversely. The talk reviews all these challenges with development results of their mitigation as well as construction status.
Funding	Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
Paper	download WEYA01.PDF [0.926 MB / 6 pages]
Slides	download WEYA01_TALK.PDF [16.820 MB]
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Conference	IPAC2016, Busan, Korea
Series	International Particle Accelerator Conference (7th)
Proceedings	Link to full IPAC2016 Proccedings
Session	Invited Oral Presentation, Hadron Accelerators
Date	11-May-16   11:00–11:30
Main Classification	04 Hadron Accelerators
Sub Classification	A08 Linear Accelerators
Keywords	linac, solenoid, ion, focusing, cavity
Publisher	JACoW, Geneva, Switzerland
Editors	Christine Petit-Jean-Genaz (CERN, Geneva, Switzerland); Dong Eon Kim (PAL, Pohang, Republic of Korea); Kyung Sook Kim (PAL, Pohang, Republic of Korea); In Soo Ko (POSTECH, Pohang, Republic of Korea); Volker RW Schaa (GSI, Darmstadt, Germany)
ISBN	978-3-95450-147-2
Published	June 2016
Copyright	Copyright © 2016 by JACoW, Geneva, Switzerland     cc Creative Commons Attribution 3.0