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Title: TECHNICAL DESIGN REPORT FOR A NOSECONE CALORIMETER (NCC) FOR THE PHENIX EXPERIMENT.

Abstract

A remarkable result has emerged from the first several years of data taking at RHIC--the high temperature and density phase of QCD matter created in heavy ion collisions at RHIC is best described as a near perfect fluid--the strongly interacting Quark-Gluon-Plasma (sQGP). This state is characterized by a small viscosity to entropy ratio, and a high density of color charges which induces huge energy losses of partons transversing the medium. The task for the future is to understand the characteristics of the sQGP, and perhaps more importantly--to gain some insight into how and why such a medium is created. The PHENIX detector has been one of the primary experimental tools at RHIC; in particular the electromagnetic calorimeter has been a critical component of many of the measurements leading to this discovery. The coverage of the present PHENIX electromagnetic calorimeter is rather limited, covering half the azimuth and -0.35< {eta} <0.35 Further progress requires larger coverage of electromagnetic calorimetry, both to increase the rate for low cross section phenomena, and to cover a broader range of pseudorapidity to study the rapidity dependence of the medium. A pair of Nosecone Calorimeters (NCC) has been designed covering both positive and negative rapidity regionsmore » 1< |{eta}| <3 of the PHENIX detector. The NCC will make it possible to perform tomographic studies of the jet energy dependence of energy loss and medium response, by using direct photons as trigger particles over a large rapidity range. The technique of correlating trigger hadrons with low momentum hadrons has been powerfully exploited at RHIC to study the evolution of back to back jets [1, 2] and hence the response of the medium. The NCC will make it possible to do such studies using direct photons as the trigger particles. The direct photon in such ''photon-jet'' events tags the transverse momentum of outgoing parton which then fragments into lower energy particles. Together with the Forward Silicon Vertex detector (FVTX), the NCC will make PHENIX a large acceptance spectrometer, capable of detecting photons, electrons, muons, and hadrons. Our prime motivation is to provide precision measurements of direct photons, {pi}{sup 0}s and dielectrons in A+A, p(d)+A, and polarized p+p collisions. The upgrade will provide access to physics observables that are not currently accessible to PHENIX or that are now available only indirectly with very limited accuracy.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
912838
Report Number(s):
BNL-79215-2007
R&D Project: 08842; KB0201021; TRN: US0800594
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; CALORIMETERS; CALORIMETRY; CROSS SECTIONS; DESIGN; ELECTRONS; ENERGY DEPENDENCE; ENERGY LOSSES; ENTROPY; HADRONS; HEAVY IONS; MUONS; PARTICLE RAPIDITY; PHOTONS; QUANTUM CHROMODYNAMICS; SAFETY REPORTS; SILICON; TRANSVERSE MOMENTUM

Citation Formats

EXPERIMENT, PHENIX, OBRIEN, E, BOOSE, S, CHIU, M, JOHNSON, B M, KISTENEV, E P, LYNCH, D, NOUICER, R, PAK, R, PISANI, R, STOLL, S P, SUKHANOV, A, WOODY, C L, LI, Z, RADEKA, V, RESCIA, S, and PHENIX EXPERIMENT COLLABORATORS). TECHNICAL DESIGN REPORT FOR A NOSECONE CALORIMETER (NCC) FOR THE PHENIX EXPERIMENT.. United States: N. p., 2007. Web. doi:10.2172/912838.
EXPERIMENT, PHENIX, OBRIEN, E, BOOSE, S, CHIU, M, JOHNSON, B M, KISTENEV, E P, LYNCH, D, NOUICER, R, PAK, R, PISANI, R, STOLL, S P, SUKHANOV, A, WOODY, C L, LI, Z, RADEKA, V, RESCIA, S, & PHENIX EXPERIMENT COLLABORATORS). TECHNICAL DESIGN REPORT FOR A NOSECONE CALORIMETER (NCC) FOR THE PHENIX EXPERIMENT.. United States. doi:10.2172/912838.
EXPERIMENT, PHENIX, OBRIEN, E, BOOSE, S, CHIU, M, JOHNSON, B M, KISTENEV, E P, LYNCH, D, NOUICER, R, PAK, R, PISANI, R, STOLL, S P, SUKHANOV, A, WOODY, C L, LI, Z, RADEKA, V, RESCIA, S, and PHENIX EXPERIMENT COLLABORATORS). Wed . "TECHNICAL DESIGN REPORT FOR A NOSECONE CALORIMETER (NCC) FOR THE PHENIX EXPERIMENT.". United States. doi:10.2172/912838. https://www.osti.gov/servlets/purl/912838.
@article{osti_912838,
title = {TECHNICAL DESIGN REPORT FOR A NOSECONE CALORIMETER (NCC) FOR THE PHENIX EXPERIMENT.},
author = {EXPERIMENT, PHENIX and OBRIEN, E and BOOSE, S and CHIU, M and JOHNSON, B M and KISTENEV, E P and LYNCH, D and NOUICER, R and PAK, R and PISANI, R and STOLL, S P and SUKHANOV, A and WOODY, C L and LI, Z and RADEKA, V and RESCIA, S and PHENIX EXPERIMENT COLLABORATORS)},
abstractNote = {A remarkable result has emerged from the first several years of data taking at RHIC--the high temperature and density phase of QCD matter created in heavy ion collisions at RHIC is best described as a near perfect fluid--the strongly interacting Quark-Gluon-Plasma (sQGP). This state is characterized by a small viscosity to entropy ratio, and a high density of color charges which induces huge energy losses of partons transversing the medium. The task for the future is to understand the characteristics of the sQGP, and perhaps more importantly--to gain some insight into how and why such a medium is created. The PHENIX detector has been one of the primary experimental tools at RHIC; in particular the electromagnetic calorimeter has been a critical component of many of the measurements leading to this discovery. The coverage of the present PHENIX electromagnetic calorimeter is rather limited, covering half the azimuth and -0.35< {eta} <0.35 Further progress requires larger coverage of electromagnetic calorimetry, both to increase the rate for low cross section phenomena, and to cover a broader range of pseudorapidity to study the rapidity dependence of the medium. A pair of Nosecone Calorimeters (NCC) has been designed covering both positive and negative rapidity regions 1< |{eta}| <3 of the PHENIX detector. The NCC will make it possible to perform tomographic studies of the jet energy dependence of energy loss and medium response, by using direct photons as trigger particles over a large rapidity range. The technique of correlating trigger hadrons with low momentum hadrons has been powerfully exploited at RHIC to study the evolution of back to back jets [1, 2] and hence the response of the medium. The NCC will make it possible to do such studies using direct photons as the trigger particles. The direct photon in such ''photon-jet'' events tags the transverse momentum of outgoing parton which then fragments into lower energy particles. Together with the Forward Silicon Vertex detector (FVTX), the NCC will make PHENIX a large acceptance spectrometer, capable of detecting photons, electrons, muons, and hadrons. Our prime motivation is to provide precision measurements of direct photons, {pi}{sup 0}s and dielectrons in A+A, p(d)+A, and polarized p+p collisions. The upgrade will provide access to physics observables that are not currently accessible to PHENIX or that are now available only indirectly with very limited accuracy.},
doi = {10.2172/912838},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {8}
}

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