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Title: Effect of pulsed hollow electron-lens operation on the proton beam core in LHC

Abstract

Collimation with hollow electron beams is currently one of the most promising concepts for active halo control in the HL-LHC. In order to further increase the diffusion rates for a fast halo removal as e.g. desired before the squeeze, the electron lens (e-lens) can be operated in pulsed mode. In case of profile imperfections in the electron beam the pulsing of the e-lens induces noise on the proton beam which can, depending on the frequency content and strength, lead to emittance growth. In order to study the sensitivity to the pulsing pattern and the amplitude, a beam study (machine development MD) at the LHC has been proposed for August 2016 and we present in this note the preparatory simulations and estimates.

Authors:
 [1];  [1];  [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1408326
Report Number(s):
FERMILAB-TM-2635-AD; arXiv:1611.02678
1496416; TRN: US1800530
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; PROTON BEAMS; ELECTRON BEAMS; CERN LHC; PROTONS; ELECTRONS

Citation Formats

Fitterer, Miriam, Stancari, Giulio, and Valishev, Alexander. Effect of pulsed hollow electron-lens operation on the proton beam core in LHC. United States: N. p., 2016. Web. doi:10.2172/1408326.
Fitterer, Miriam, Stancari, Giulio, & Valishev, Alexander. Effect of pulsed hollow electron-lens operation on the proton beam core in LHC. United States. https://doi.org/10.2172/1408326
Fitterer, Miriam, Stancari, Giulio, and Valishev, Alexander. Tue . "Effect of pulsed hollow electron-lens operation on the proton beam core in LHC". United States. https://doi.org/10.2172/1408326. https://www.osti.gov/servlets/purl/1408326.
@article{osti_1408326,
title = {Effect of pulsed hollow electron-lens operation on the proton beam core in LHC},
author = {Fitterer, Miriam and Stancari, Giulio and Valishev, Alexander},
abstractNote = {Collimation with hollow electron beams is currently one of the most promising concepts for active halo control in the HL-LHC. In order to further increase the diffusion rates for a fast halo removal as e.g. desired before the squeeze, the electron lens (e-lens) can be operated in pulsed mode. In case of profile imperfections in the electron beam the pulsing of the e-lens induces noise on the proton beam which can, depending on the frequency content and strength, lead to emittance growth. In order to study the sensitivity to the pulsing pattern and the amplitude, a beam study (machine development MD) at the LHC has been proposed for August 2016 and we present in this note the preparatory simulations and estimates.},
doi = {10.2172/1408326},
url = {https://www.osti.gov/biblio/1408326}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {11}
}