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Title: Demonstration of electron cooling using a pulsed beam from an electrostatic electron cooler

Journal Article · · Physical Review Accelerators and Beams
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Cooling of hadron beams is critically important in the next generation of hadron storage rings for delivery of unprecedented performance. One such application is the electron-ion collider presently under development in the US. The desire to develop electron coolers for operation at much higher energies than previously achieved necessitates the use of radio-frequency (rf) fields for acceleration as opposed to the conventional, electrostatic approach. While electron cooling is a mature technology at low energy utilizing a dc beam, rf acceleration requires the cooling beam to be bunched, thus extending the parameter space to an unexplored territory. It is important to experimentally demonstrate the feasibility of cooling with electron bunches and further investigate how the relative time structure of the two beams affects the cooling properties; thus, a set of four pulsed-beam cooling experiments was carried out by a collaboration of Jefferson Lab and Institute of Modern Physics (IMP). The experiments have successfully demonstrated cooling with a beam of electron bunches in both the longitudinal and transverse directions for the first time. We have measured the effect of the electron bunch length and longitudinal ion focusing strength on the temporal evolution of the longitudinal and transverse ion beam profile and demonstrate that if the synchronization can be accurately maintained, the dynamics are not adversely affected by the change in time structure.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); Chinese Academy of Sciences (CAS); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC05-06OR23177; 113462KYSB20170051; 11575264
OSTI ID:
1755982
Alternate ID(s):
OSTI ID: 1756027
Report Number(s):
JLAB-ACP-20-3224; DOE/OR/23177-5003; arXiv: 2010.15791; PRABCJ; 012801
Journal Information:
Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Vol. 24 Journal Issue: 1; ISSN 2469-9888
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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journal September 2018
Experimental Demonstration of Hadron Beam Cooling Using Radio-Frequency Accelerated Electron Bunches journal February 2020
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journal August 2002
Experimental Demonstration of Ion Beam Cooling with Pulsed Electron Beam text January 2018
Experimental Demonstration of Electron Cooling with Bunched Electron Beam text January 2018

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