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Title: Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity

Abstract

To improve RHIC luminosity for heavy ion beam energies below 10GeV/nucleon, the Low Energy RHIC electron Cooler (LEReC) is currently under commissioning at BNL. The Linac of LEReC is designed to deliver a 1.6MeV to 2.6MeV electron beam, with rms dp/p less than 5e-4.A 704 MHz superconducting radio frequency (SRF) booster cavity in this Linac provides up to 2.2 MeV accelerating voltage.With such a low energy and very demanding energy spread requirement,control of Higher Order Modes (HOMs) in the cavities becomes critical and needs to be carefully evaluated to ensure minimum impact on the beam. In this study, we report the multiphysics design of the HOM damper for this cavity to meet the energy spread requirement, as well as experimental results of the cavity with and without the HOM damper.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1512350
Alternate Identifier(s):
OSTI ID: 1508746
Report Number(s):
BNL-211577-2019-JAAM
Journal ID: ISSN 2469--9888
Grant/Contract Number:  
SC0012704; AC02-98CH10886; AC02-05CH11231
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Journal ID: ISSN 2469--9888
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Xiao, Binping, Fedotov, A., Hahn, H., Holmes, D., McIntyre, G., Pai, C., Seberg, S., Smith, K., Than, R., Thieberger, P., Tuozzolo, J., Wu, Q., Xin, T., Xu, Wencan, and Zaltsman, A.. Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity. United States: N. p., 2019. Web. doi:10.1103/PhysRevAccelBeams.22.050101.
Xiao, Binping, Fedotov, A., Hahn, H., Holmes, D., McIntyre, G., Pai, C., Seberg, S., Smith, K., Than, R., Thieberger, P., Tuozzolo, J., Wu, Q., Xin, T., Xu, Wencan, & Zaltsman, A.. Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity. United States. doi:10.1103/PhysRevAccelBeams.22.050101.
Xiao, Binping, Fedotov, A., Hahn, H., Holmes, D., McIntyre, G., Pai, C., Seberg, S., Smith, K., Than, R., Thieberger, P., Tuozzolo, J., Wu, Q., Xin, T., Xu, Wencan, and Zaltsman, A.. Tue . "Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity". United States. doi:10.1103/PhysRevAccelBeams.22.050101.
@article{osti_1512350,
title = {Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity},
author = {Xiao, Binping and Fedotov, A. and Hahn, H. and Holmes, D. and McIntyre, G. and Pai, C. and Seberg, S. and Smith, K. and Than, R. and Thieberger, P. and Tuozzolo, J. and Wu, Q. and Xin, T. and Xu, Wencan and Zaltsman, A.},
abstractNote = {To improve RHIC luminosity for heavy ion beam energies below 10GeV/nucleon, the Low Energy RHIC electron Cooler (LEReC) is currently under commissioning at BNL. The Linac of LEReC is designed to deliver a 1.6MeV to 2.6MeV electron beam, with rms dp/p less than 5e-4.A 704 MHz superconducting radio frequency (SRF) booster cavity in this Linac provides up to 2.2 MeV accelerating voltage.With such a low energy and very demanding energy spread requirement,control of Higher Order Modes (HOMs) in the cavities becomes critical and needs to be carefully evaluated to ensure minimum impact on the beam. In this study, we report the multiphysics design of the HOM damper for this cavity to meet the energy spread requirement, as well as experimental results of the cavity with and without the HOM damper.},
doi = {10.1103/PhysRevAccelBeams.22.050101},
journal = {Physical Review Accelerators and Beams},
issn = {2469--9888},
number = 5,
volume = 22,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevAccelBeams.22.050101

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