Storage-ring Electron Cooler for Relativistic Ion Beams

Conference · Sun May 01 00:00:00 EDT 2016

DOI:https://doi.org/10.18429/JACoW-IPAC2016-WEPMW020· OSTI ID:1286004

Lin, Fanglei ^[1]; Derbenev, Yaroslav ^[1]; Douglas, David R. ^[1]; Guo, Jiquan ^[1]; Johnson, Rolland P. ^[2]; Krafft, Geoffrey A. ^[1]; Morozov, Vasiliy ^[1]; Zhang, Yuhong ^[1]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. Muons Inc., Batavia, IL (United States)

Application of electron cooling at ion energies above a few GeV has been limited due to reduction of electron cooling efficiency with energy and difficulty in producing and accelerating a high-current high-quality electron beam. A high-current storage-ring electron cooler offers a solution to both of these problems by maintaining high cooling beam quality through naturally-occurring synchrotron radiation damping of the electron beam. However, the range of ion energies where storage-ring electron cooling can be used has been limited by low electron beam damping rates at low ion energies and high equilibrium electron energy spread at high ion energies. This paper reports a development of a storage ring based cooler consisting of two sections with significantly different energies: the cooling and damping sections. The electron energy and other parameters in the cooling section are adjusted for optimum cooling of a stored ion beam. The beam parameters in the damping section are adjusted for optimum damping of the electron beam. The necessary energy difference is provided by an energy recovering SRF structure. A prototype linear optics of such storage-ring cooler is presented.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177; AC02-06CH11357
• OSTI ID: 1286004
• Report Number(s): JLAB-ACP-16-2303; DOE/OR/23177-3886
• Resource Relation: Conference: IPAC'16, 08-13 May 2016. Busan, Korea
• Country of Publication: United States
• Language: English