MWPC prototyping and performance test for the STAR inner TPC upgrade

Abstract

A new prototype of STAR inner Time Projection Chamber (iTPC) MWPC sector has been fabricated and tested in an X-ray test system. The wire chamber built at Shandong University has a wire tension precision better than 6$\%$ and wire pitch precision better than 10 $\mu$m. The gas gain uniformity and energy resolution are measured to be better than 1$\%$ (RMS) and 20$\%$ (FWHM), respectively, using an ${}^{55}$Fe X-ray source. The iTPC upgrade project is to replace all 24 STAR TPC inner sectors as a crucial detector upgrade for the RHIC beam energy scan phase II program. The test results show that the constructed iTPC prototype meets all project requirements.

arXiv comment8 pages, 12 figures

References in corpus (3)

• The STAR Time Projection Chamber: A Unique Tool for Studying High Multiplicity Events at RHIC
• Design and implementation of wire tension measurement system for MWPCs used in the STAR iTPC upgrade
• A prototype low-background multiwire proportional chamber for measuring alphas and low-energy betas

Cited by in corpus (3)

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• Studies on ion back-flow of Time Projection Chamber based on GEM and anode wire grid
• Performance of the Endcap Time-of-Flight detector in the STAR beam-energy scan