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Title: eRHIC Beam Scrubbing

Abstract

We propose using beam scrubbing to mitigate the electron cloud effect in the eRHIC. The bunch number is adjusted below the heat load limit, then it increases with the reduced secondary electron yield resulted from the beam scrubbing, up to the design bunch number. Since the electron density threshold of beam instability is lower at the injection, a preliminary injection scrubbing should go first, where large chromaticity can be used to keep the beam in the ring for scrubbing. After that, the beam can be ramped to full energy, allowing physics scrubbing. Simulations demonstrated that with beam scrubbing in a reasonable period of time, the eRHIC baseline design is feasible.

Authors:
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1392223
Report Number(s):
BNL-114220-2017-IR
R&D Project: KBCH139; KB0202011; TRN: US1800570
DOE Contract Number:  
SC0012704
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ELECTRONS; BEAMS; SCRUBBING; ELECTRON DENSITY

Citation Formats

Zhang, S. Y. eRHIC Beam Scrubbing. United States: N. p., 2017. Web. doi:10.2172/1392223.
Zhang, S. Y. eRHIC Beam Scrubbing. United States. doi:10.2172/1392223.
Zhang, S. Y. Thu . "eRHIC Beam Scrubbing". United States. doi:10.2172/1392223. https://www.osti.gov/servlets/purl/1392223.
@article{osti_1392223,
title = {eRHIC Beam Scrubbing},
author = {Zhang, S. Y.},
abstractNote = {We propose using beam scrubbing to mitigate the electron cloud effect in the eRHIC. The bunch number is adjusted below the heat load limit, then it increases with the reduced secondary electron yield resulted from the beam scrubbing, up to the design bunch number. Since the electron density threshold of beam instability is lower at the injection, a preliminary injection scrubbing should go first, where large chromaticity can be used to keep the beam in the ring for scrubbing. After that, the beam can be ramped to full energy, allowing physics scrubbing. Simulations demonstrated that with beam scrubbing in a reasonable period of time, the eRHIC baseline design is feasible.},
doi = {10.2172/1392223},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jun 22 00:00:00 EDT 2017},
month = {Thu Jun 22 00:00:00 EDT 2017}
}

Technical Report:

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