IBIC2012 - List of Authors (Placidi, M.)

Paper	Title	Page
MOPB50	Design and Operation of the High Intensity Luminosity Monitors of the LHC	179
	H.S. Matis, S.C. Hedges, M. Placidi, A. Ratti, W.C. Turner LBNL, Berkeley, California, USA E. Bravin CERN, Geneva, Switzerland R. Miyamoto ESS, Lund, Sweden
	Funding: We acknowledge the US-LARP program that is sponsoring this work and NERSC, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. We have built a high-pressure ionization chamber (BRAN) for the IP1 (ATLAS) and IP5 (CMS) regions of the LHC. This chamber is designed to measure the relative bunch-by-bunch collision rate of the LHC from 10²⁸ cm^-2s⁻¹ during beam commissioning all the way up to the expected full luminosity of 10³⁴ cm^-2s⁻¹ at 7.0 TeV. These high-pressure ionization chambers measure the intensity of hadronic/electromagnetic showers produced by the forward neutral particles of LHC collisions. They are designed to withstand the high radiation produced by these forward collisions and are currently used in LHC operations. This paper covers the detector's design and performance in measuring both pp and PbPb collisions during LHC operation, including a comparison with the ATLAS and CMS luminosity measurements. The work also includes modeling of the detectors and the ability to predict how the detector will respond to the higher energy and intensity operation of the LHC with different operating modes involving both ions and protons.

Paper

Title

Page

Design and Operation of the High Intensity Luminosity Monitors of the LHC

179

H.S. Matis, S.C. Hedges, M. Placidi, A. Ratti, W.C. Turner
LBNL, Berkeley, California, USA
E. Bravin
CERN, Geneva, Switzerland
R. Miyamoto
ESS, Lund, Sweden

Funding: We acknowledge the US-LARP program that is sponsoring this work and NERSC, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
We have built a high-pressure ionization chamber (BRAN) for the IP1 (ATLAS) and IP5 (CMS) regions of the LHC. This chamber is designed to measure the relative bunch-by-bunch collision rate of the LHC from 10²⁸ cm^-2s⁻¹ during beam commissioning all the way up to the expected full luminosity of 10³⁴ cm^-2s⁻¹ at 7.0 TeV. These high-pressure ionization chambers measure the intensity of hadronic/electromagnetic showers produced by the forward neutral particles of LHC collisions. They are designed to withstand the high radiation produced by these forward collisions and are currently used in LHC operations. This paper covers the detector's design and performance in measuring both pp and PbPb collisions during LHC operation, including a comparison with the ATLAS and CMS luminosity measurements. The work also includes modeling of the detectors and the ability to predict how the detector will respond to the higher energy and intensity operation of the LHC with different operating modes involving both ions and protons.