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Title: Simulations of the LHC high luminosity monitors at beam energies from 3.5 TeV to 7.0 TeV

Abstract

We have constructed two pairs of fast ionization chambers (BRAN) for measurement and optimization of luminosity at IR1 and IR5 of the LHC. These devices are capable of monitoring the performance of the LHC at low luminosity 10{sup 28} cm{sup -2}s{sup -1} during beam commissioning all the way up to the expected full luminosity of 10{sup 34} cm{sup -2}s{sup -1} at 7.0 TeV. The ionization chambers measure the intensity of hadronic/electromagnetic showers produced by the forward neutral particles of LHC collisions. To predict and improve the understanding of the BRAN performance, we created a detailed FLUKA model of the detector and its surroundings. In this paper, we describe the model and the results of our simulations including the detector's estimated response to pp collisions at beam energies of 3.5, 5.0, and 7.0 TeV per beam. In addition, these simulations show the sensitivity of the BRAN to the crossing angle of the two LHC beams. It is shown that the BRAN sensitivity to the crossing angle is proportional to the measurement of crossing angle by the LHC beam position monitors.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
DOE - Office Of Science
OSTI Identifier:
1013540
Report Number(s):
BNL-94204-2011-CP
R&D Project: KBCH139; 18054; KB0202011; TRN: US1102517
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 2011 Particle Accelerator Conference (PAC'11); New York, NY; 20110328 through 20110401
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM POSITION; COMMISSIONING; IONIZATION CHAMBERS; LUMINOSITY; MONITORING; MONITORS; NEUTRAL PARTICLES; OPTIMIZATION; PERFORMANCE; SENSITIVITY

Citation Formats

Matis, H S, Miyamoto, R, Humphreys, P, Ratti, A, Turner, W C, and Stiller, J. Simulations of the LHC high luminosity monitors at beam energies from 3.5 TeV to 7.0 TeV. United States: N. p., 2011. Web.
Matis, H S, Miyamoto, R, Humphreys, P, Ratti, A, Turner, W C, & Stiller, J. Simulations of the LHC high luminosity monitors at beam energies from 3.5 TeV to 7.0 TeV. United States.
Matis, H S, Miyamoto, R, Humphreys, P, Ratti, A, Turner, W C, and Stiller, J. Mon . "Simulations of the LHC high luminosity monitors at beam energies from 3.5 TeV to 7.0 TeV". United States. https://www.osti.gov/servlets/purl/1013540.
@article{osti_1013540,
title = {Simulations of the LHC high luminosity monitors at beam energies from 3.5 TeV to 7.0 TeV},
author = {Matis, H S and Miyamoto, R and Humphreys, P and Ratti, A and Turner, W C and Stiller, J},
abstractNote = {We have constructed two pairs of fast ionization chambers (BRAN) for measurement and optimization of luminosity at IR1 and IR5 of the LHC. These devices are capable of monitoring the performance of the LHC at low luminosity 10{sup 28} cm{sup -2}s{sup -1} during beam commissioning all the way up to the expected full luminosity of 10{sup 34} cm{sup -2}s{sup -1} at 7.0 TeV. The ionization chambers measure the intensity of hadronic/electromagnetic showers produced by the forward neutral particles of LHC collisions. To predict and improve the understanding of the BRAN performance, we created a detailed FLUKA model of the detector and its surroundings. In this paper, we describe the model and the results of our simulations including the detector's estimated response to pp collisions at beam energies of 3.5, 5.0, and 7.0 TeV per beam. In addition, these simulations show the sensitivity of the BRAN to the crossing angle of the two LHC beams. It is shown that the BRAN sensitivity to the crossing angle is proportional to the measurement of crossing angle by the LHC beam position monitors.},
doi = {},
url = {https://www.osti.gov/biblio/1013540}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {3}
}

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