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arXiv · 1805.03938

MWPC prototyping and performance test for the STAR inner TPC upgrade

Fuwang Shen·Shuai Wang·Fangang Kong·Shiwei Bai·Changyu Li·Flemming Videbaek·Zhangbu Xu·Chengguang Zhu·Qinghua Xu·Chi Yang
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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.

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Fuwang Shen, Shuai Wang, Fangang Kong, Shiwei Bai, Changyu Li, Flemming Videbaek, Zhangbu Xu, Chengguang Zhu, Qinghua Xu, Chi Yang. 2018-05-10. MWPC prototyping and performance test for the STAR inner TPC upgrade. https://doi.org/10.1016/j.nima.2018.04.019

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