STAR TOF MRPC Huan Zhong Huang Department of
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STAR TOF MRPC Huan Zhong Huang Department of Physics and Astronomy University of California, Los Angeles For the Chinese STAR TOF Collaboration
Chinese STAR Collaboration University of Science and Technology of China (USTC) Tsinghua University Shanghai Institute of Applied Physics (SINAP) Central China Normal University, Wuhan (CCNU) Institute of Modern Physics, Lanzhou (IMP) Institute of High Energy Physics, Beijing (IHEP) Group Leaders: Yugang Ma (SINAP) Hongfang Chen (USTC) Jianping Cheng (Tsinghua) Construction Sites: Tsinghua and USTC
Chinese STAR-TOF Group Responsibility Manufacture of all MRPC Modules in China ~ 4000 modules including spare ones Quality Assurance and Module Testing in China - HV, Current and Noise Testing for each module - Cosmic Ray Testing for Each Module ADC, Efficiency and Timing Testing for ~20% - Early batches will be fully tested! TOF Tray will be assembled at UT Austin: - Post-assembly testing is planned by STAR - Pre-assembly testing for early shipment All Electric Connectors will be supplied by US STAR Group !
MRPC Module Mechanical Spec Side-View
MRPC Module Mechanical Spec End-View
Materials and Vendors have been selected Tsinghua and USTC will use the same vendors
MRPC Testing in China Cosmic Ray Testing: Gas – Freon 95%, Iso-Butane 5% HV – 14000 V ( 7000 V) 0) Overall Dimensional Tolerance 1) Leakage Current < 2 n. A 2) Noise Rate < 50 Hz/Channel at 50 m. V Threshold 3) Streamer Rate < 20% in ADC Spectrum 4) Effective Efficiency > 90% 5) Timing Resolution ~< 100+-20 ps
Many MRPC Modules Have Been Produced at Tsinghua and USTC
Production Readiness in China Two Production Sites in China: Tsinghua University (70%) University of Science and Technology of China (USTC) (30%) Each Site with QA and Testing Facilities. Web-based Module Data-Base(USTC) Accessible at the Assembly Site.
Tsinghua University
MRPC workshop>200 m 2 at Tsinghua Assemble room
Tools developed by Tsinghua University The same tools and testing procedures will be used at both Tsinghua and USTC. The same module testing database will be used.
New laboratory at USTC
New laboratory at USTC
Production Schedule US DOE Approval of the STAR TOF Project 12 -2005 STAR MRPC Production Review Mid-April 2006 Short-Term Production Schedule 128 MRPC Modules (4 Trays) by 08 -2006 768 MRPC Modules (24 Trays) by 02 -2007 (Will meet STAR TOF installation schedule)
Production Readiness Review Date: Middle of April – needs to be decided soon Chinese Group: Material Procurement Material Testing Production Procedure/Instruction Document Technician Training Testing Setup and Testing Procedure Data Base for Module Tracking - Production/Testing Results - Quality Assurance/Responsibility Lots of Work – But All Is Going Well !
