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Title: Development of a detector for bunch by bunch measurement and optimization of luminosity in the LHC

Abstract

The front IR quadrupole absorbers (TAS) and the IR neutral particle absorbers (TAN) in the high luminosity insertions of the LHC each absorb approximately 1.8TeV of forward collision products on average per pp interaction ({approximately}235W at design luminosity 1034cm-2s-1). This secondary particle flux can be exploited to provide a useful storage ring operations tool for optimization of luminosity. Novel segmented, multi-gap, pressurized gas ionization chambers are proposed for sampling the energy deposited near the maxima of the hadronic/ electromagnetic showers in these absorbers. The system design choices have been strongly influenced by optimization of signal to noise ratio and by the very high radiation environment. The ionization chambers are instrumented with state of the art low noise, fast, pulse shaping electronics capable of resolving individual bunch crossings at 40 MHz. Data on each bunch are separately accumulated over multiple bunch crossings until the desired statistical accuracy is obtained. At design luminosity approximately 2x103 bunch crossings suffice for a 1% luminosity measurement.

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Lab., CA (US)
Sponsoring Org.:
USDOE Director, Office of Science. Office of High Energy and Nuclear Physics. Division of High Energy Physics (US)
OSTI Identifier:
783457
Report Number(s):
LBNL-45774; CBP Note-337
R&D Project: Z5LPG3; TRN: US0103994
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Nuclear Instruments and Methods in Physics Research, Section A
Additional Journal Information:
Journal Volume: 461; Journal Issue: 1-3; Other Information: Journal Publication Date: April 1, 2001; PBD: 19 May 2000
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; DESIGN; IONIZATION CHAMBERS; BEAM LUMINOSITY; NEUTRAL PARTICLES; OPTIMIZATION; QUADRUPOLES; SIGNAL-TO-NOISE RATIO; STORAGE RINGS; LINEAR COLLIDERS; BEAM BUNCHING; HADRONS; LARGE HADRON COLLIDER LUMINOSITY IONIZATION CHAMBER

Citation Formats

Turner, W.C., Burks, M.T., Datte, P.S., Manfredi, P.F., Millaud, J.E., Mokhov, N.V., Placidi, M., Ratti, L., Re, V., Schmickler, H., and Speziali, V. Development of a detector for bunch by bunch measurement and optimization of luminosity in the LHC. United States: N. p., 2000. Web.
Turner, W.C., Burks, M.T., Datte, P.S., Manfredi, P.F., Millaud, J.E., Mokhov, N.V., Placidi, M., Ratti, L., Re, V., Schmickler, H., & Speziali, V. Development of a detector for bunch by bunch measurement and optimization of luminosity in the LHC. United States.
Turner, W.C., Burks, M.T., Datte, P.S., Manfredi, P.F., Millaud, J.E., Mokhov, N.V., Placidi, M., Ratti, L., Re, V., Schmickler, H., and Speziali, V. Fri . "Development of a detector for bunch by bunch measurement and optimization of luminosity in the LHC". United States. https://www.osti.gov/servlets/purl/783457.
@article{osti_783457,
title = {Development of a detector for bunch by bunch measurement and optimization of luminosity in the LHC},
author = {Turner, W.C. and Burks, M.T. and Datte, P.S. and Manfredi, P.F. and Millaud, J.E. and Mokhov, N.V. and Placidi, M. and Ratti, L. and Re, V. and Schmickler, H. and Speziali, V.},
abstractNote = {The front IR quadrupole absorbers (TAS) and the IR neutral particle absorbers (TAN) in the high luminosity insertions of the LHC each absorb approximately 1.8TeV of forward collision products on average per pp interaction ({approximately}235W at design luminosity 1034cm-2s-1). This secondary particle flux can be exploited to provide a useful storage ring operations tool for optimization of luminosity. Novel segmented, multi-gap, pressurized gas ionization chambers are proposed for sampling the energy deposited near the maxima of the hadronic/ electromagnetic showers in these absorbers. The system design choices have been strongly influenced by optimization of signal to noise ratio and by the very high radiation environment. The ionization chambers are instrumented with state of the art low noise, fast, pulse shaping electronics capable of resolving individual bunch crossings at 40 MHz. Data on each bunch are separately accumulated over multiple bunch crossings until the desired statistical accuracy is obtained. At design luminosity approximately 2x103 bunch crossings suffice for a 1% luminosity measurement.},
doi = {},
journal = {Nuclear Instruments and Methods in Physics Research, Section A},
number = 1-3,
volume = 461,
place = {United States},
year = {2000},
month = {5}
}