Performance of TOF-RPC for the BGOegg experiment

N. Tomida, N. Tran, M. Niiyama, H. Ohnishi, N. Muramatsu

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11 Citations (Scopus)


We constructed a new time-of-flight (TOF) detector consisting of resistive plate chambers (RPCs) to measure particle energy in the BGOegg experiment. The BGOegg-RPC has a unique feature which enables us to cover a large area with a small number of readout channels. For this purpose, we developed the RPC with a strip size of 2.5 cm × 100 cm. The BGOegg-RPC covers an area of 320 cm × 200 cm with only 256 channels of readout electronics. In case of large readout RPCs, an originated signal is distorted and dispersed during propagation. In addition, there happens a signal reflection at the end of the strip. Although we designed the BGOegg-RPC and front-end electronics with minimized signal reflection, a small reflection still remained, deteriorating the resulting time resolution. After establishing calibration and correction methods to improve the performance of the BGOegg-RPC, we obtained the time resolution of σ ∼ 60 ps around the central region of strips.

Original languageEnglish
Article numberC11037
JournalJournal of Instrumentation
Issue number11
Publication statusPublished - 2016 Nov 28


  • Instrumentation and methods for time-of-flight (TOF) spectroscopy
  • Resistive-plate chambers
  • Timing detectors


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