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Construction of a hadronic calorimeter prototype for the future CERN LHC high energy accelerator; Construction d`un prototype de calorimetre hadronique pour le futur collisionneur a haute energie LHC du CERN

Abstract

The study of fragment-fragment correlations at small relative momentum can give informations on the space and time extend of the emitting source, and on the nuclear density, which is one of the variables used in the equation of state. This analysis shows the experimental results obtained with the FOPI detector at GSI Darmstadt, for Au + Au central collisions at 150 and 400 A.MeV. These results are the first studies at such high energies and for heavy systems. Two fragments correlation functions are compared with theoretical calculations of D.H. Boal, including the size of the source as a parameter. We must take into account effects of experimental biases (namely the relative momentum resolution) on the theoretical correlation function, in order to make a comparison with experimental results. The extracted experimental radii correspond to the final phase of the expansion, and the obtained densities are smaller than normal density of nuclear matter. In the final state of the interaction, intermediate mass fragments and their excited states are observed. We note a shift of these excited states at 400 A.MeV, which can be explained by the detector effects. We observe a weak sensibility of the source size versus the centrality of the  More>>
Authors:
Publication Date:
Jun 01, 1994
Product Type:
Thesis/Dissertation
Report Number:
LAPP-T-94-04
Reference Number:
SCA: 440104; 430303; 663450; PA: AIX-28:062113; EDB-97:120258; SN: 97001848313
Resource Relation:
Other Information: DN: 116 refs.; TH: These (D. es Sc.).; PBD: Jun 1994
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 43 PARTICLE ACCELERATORS; 66 PHYSICS; CALORIMETERS; CERN LHC; ACCELERATOR FACILITIES; ARGON; ATLAS SUPERCONDUCTING LINAC; BENCH-SCALE EXPERIMENTS; COMPARATIVE EVALUATIONS; CORRELATION FUNCTIONS; FRAGMENTATION; GOLD 197 REACTIONS; GOLD 197 TARGET; HIGH ENERGY PHYSICS; MONTE CARLO METHOD; PROTON BEAMS; RADIATION DETECTORS; SIMULATION
OSTI ID:
524090
Research Organizations:
Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules Elementaires
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE97641785; TRN: FR9502756062113
Availability:
INIS; OSTI as DE97641785
Submitting Site:
FRN
Size:
127 p.
Announcement Date:

Citation Formats

Rival, F. Construction of a hadronic calorimeter prototype for the future CERN LHC high energy accelerator; Construction d`un prototype de calorimetre hadronique pour le futur collisionneur a haute energie LHC du CERN. France: N. p., 1994. Web.
Rival, F. Construction of a hadronic calorimeter prototype for the future CERN LHC high energy accelerator; Construction d`un prototype de calorimetre hadronique pour le futur collisionneur a haute energie LHC du CERN. France.
Rival, F. 1994. "Construction of a hadronic calorimeter prototype for the future CERN LHC high energy accelerator; Construction d`un prototype de calorimetre hadronique pour le futur collisionneur a haute energie LHC du CERN." France.
@misc{etde_524090,
title = {Construction of a hadronic calorimeter prototype for the future CERN LHC high energy accelerator; Construction d`un prototype de calorimetre hadronique pour le futur collisionneur a haute energie LHC du CERN}
author = {Rival, F}
abstractNote = {The study of fragment-fragment correlations at small relative momentum can give informations on the space and time extend of the emitting source, and on the nuclear density, which is one of the variables used in the equation of state. This analysis shows the experimental results obtained with the FOPI detector at GSI Darmstadt, for Au + Au central collisions at 150 and 400 A.MeV. These results are the first studies at such high energies and for heavy systems. Two fragments correlation functions are compared with theoretical calculations of D.H. Boal, including the size of the source as a parameter. We must take into account effects of experimental biases (namely the relative momentum resolution) on the theoretical correlation function, in order to make a comparison with experimental results. The extracted experimental radii correspond to the final phase of the expansion, and the obtained densities are smaller than normal density of nuclear matter. In the final state of the interaction, intermediate mass fragments and their excited states are observed. We note a shift of these excited states at 400 A.MeV, which can be explained by the detector effects. We observe a weak sensibility of the source size versus the centrality of the collision. That can be explained either by a mixing of sources, or by the observation of a source at the end of expansion whose the radius is quite independent of the initial centrality. Energetic particles correspond to smaller size of the source, which can be explained as a higher compression, or as a different stage of the collision. We give some prospectives for the future experiments at GSI-Darmstadt. (author). 116 refs.}
place = {France}
year = {1994}
month = {Jun}
}