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Title: Micromegas detectors for CLAS12

The electron accelerator of the Thomas Jefferson Laboratory (VI, USA) will soon be upgraded to deliver 12 GeV high intensity beams. This increase in the performance will give the opportunity to study the nucleon structure with an unprecedented accuracy. To meet this end, new equipments will be installed in the experimental areas, particularly in the Hall B/CLAS spectrometer. One of the most challenging aspects is the installation of a Central Tracker surrounding the target, dedicated to the detection of particles emitted at large angles. Micromegas detectors have been chosen to be a major element of this new equipment, due to their high rate capability as well as their robustness and light material. Using the recent bulk technology, part of these gaseous detectors are planned to be assembled in thin cylinders to maximize the acceptance. On the other hand, the presence of a strong magnetic field either perpendicular or parallel to the readout strips has important consequences which need to be carefully investigated. Finally, resistive Micromegas have been studied to further improve the rate capability.
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-PHY-12-1580; DOE/OR/23177-2319
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Name: Nucl.Instr.Meth.A; Journal Volume: 718; Conference: 12th Pisa Meeting on Advanced Detectors, La Biodola, Isola d'Elba, Italy, May 20 - 26, 2012
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Micro Pattern Gaseous Detectors; Micromegas; Resistive; Discharge; Spark; CLAS12; Ageing