skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Experimental Demonstration of Ion Beam Cooling with Pulsed Electron Beam

Abstract

Cooling ion beams at high energy is presently considered for several ion colliders, in order to achieve high luminosities by enabling a significant reduction of emittance of hadron beams. Electron beam at cooling channel in a few to tens MeV can be accelerated by a RF/SRF linac, and thus using bunched electrons to cool bunched ions. To study such cooling process, the DC electron gun of EC35 cooler at the storage ring CSRm, IMP was modified by pulsing the grid voltage. A 0.07-3.5 micro-second pulse length with a repetition frequency of less than 250 kHz and synchronized with the ion revolution frequency was obtained. The first experimental demonstration of cooling of a coasting and bunched ion beam by a pulsed electron beam was carried out. Data analysis indicates the bunch length shrinkage and the momentum spread reduction of bunched 12C+6 ion beam as evidence of cooling. A longitudinal grouping effect of the coasting ion beam by the electron pulses has also been observed*. In this paper, we will present experimental results and comparison to the simulation modelling, particularly on the bunched electron cooling data after carefully analyzing the beam diagnostic signals.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Chinese Academy of Sciences - Institute of Modern Physics (IMP), Lanzhou (China)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1473859
Report Number(s):
JLAB-ACC-18-2731; DOE/OR/23177-4458
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Conference: IPAC 2018, 29 Apr - 04 May 2018. Vancouver, BC Canada
Country of Publication:
United States
Language:
English

Citation Formats

Zhang, Yuhong, Hutton, Andrew M., Jordan, Kevin, Powers, Thomas J., Rimmer, Robert A., Spata, Michael F., Wang, Haipeng, Wang, Shaoheng, Zhang, He, Li, J., Ma, X. M., Mao, L. J., Tang, M. T., Yang, J. C., Yang, X. D., Zhao, H., and Zhao, H. W. Experimental Demonstration of Ion Beam Cooling with Pulsed Electron Beam. United States: N. p., 2018. Web. doi:10.18429/JACoW-IPAC2018-TUPAL069.
Zhang, Yuhong, Hutton, Andrew M., Jordan, Kevin, Powers, Thomas J., Rimmer, Robert A., Spata, Michael F., Wang, Haipeng, Wang, Shaoheng, Zhang, He, Li, J., Ma, X. M., Mao, L. J., Tang, M. T., Yang, J. C., Yang, X. D., Zhao, H., & Zhao, H. W. Experimental Demonstration of Ion Beam Cooling with Pulsed Electron Beam. United States. doi:10.18429/JACoW-IPAC2018-TUPAL069.
Zhang, Yuhong, Hutton, Andrew M., Jordan, Kevin, Powers, Thomas J., Rimmer, Robert A., Spata, Michael F., Wang, Haipeng, Wang, Shaoheng, Zhang, He, Li, J., Ma, X. M., Mao, L. J., Tang, M. T., Yang, J. C., Yang, X. D., Zhao, H., and Zhao, H. W. Sun . "Experimental Demonstration of Ion Beam Cooling with Pulsed Electron Beam". United States. doi:10.18429/JACoW-IPAC2018-TUPAL069. https://www.osti.gov/servlets/purl/1473859.
@article{osti_1473859,
title = {Experimental Demonstration of Ion Beam Cooling with Pulsed Electron Beam},
author = {Zhang, Yuhong and Hutton, Andrew M. and Jordan, Kevin and Powers, Thomas J. and Rimmer, Robert A. and Spata, Michael F. and Wang, Haipeng and Wang, Shaoheng and Zhang, He and Li, J. and Ma, X. M. and Mao, L. J. and Tang, M. T. and Yang, J. C. and Yang, X. D. and Zhao, H. and Zhao, H. W.},
abstractNote = {Cooling ion beams at high energy is presently considered for several ion colliders, in order to achieve high luminosities by enabling a significant reduction of emittance of hadron beams. Electron beam at cooling channel in a few to tens MeV can be accelerated by a RF/SRF linac, and thus using bunched electrons to cool bunched ions. To study such cooling process, the DC electron gun of EC35 cooler at the storage ring CSRm, IMP was modified by pulsing the grid voltage. A 0.07-3.5 micro-second pulse length with a repetition frequency of less than 250 kHz and synchronized with the ion revolution frequency was obtained. The first experimental demonstration of cooling of a coasting and bunched ion beam by a pulsed electron beam was carried out. Data analysis indicates the bunch length shrinkage and the momentum spread reduction of bunched 12C+6 ion beam as evidence of cooling. A longitudinal grouping effect of the coasting ion beam by the electron pulses has also been observed*. In this paper, we will present experimental results and comparison to the simulation modelling, particularly on the bunched electron cooling data after carefully analyzing the beam diagnostic signals.},
doi = {10.18429/JACoW-IPAC2018-TUPAL069},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {7}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: