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新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 発行・発表の年月 | 2012 |
| 形態種別 | その他 |
| 標題 | Trigger rate dependence and gas mixture of MRPC for the LEPS2 experiment at SPring-8 |
| 執筆形態 | その他 |
| 掲載誌名 | Proceedings of Science |
| 巻・号・頁 | 2012-February |
| 著者・共著者 | Hsieh Chia-Yu,Natsuki Tomida,Hiroaki Ohnishi,Masayuki Niiyama,Chang Wen-Chen,Lin Willis Tsung-Tai |
| 概要 | In order to separate K and π with momenta up to 1.1 GeV/c using Time-of-Flight (TOF) over a distance of about 100 cm in the magnet, we will use Multi-Gap Resistive Plate Chamber (MRPC) due to the need of large area, high efficiency and overall time resolution in the range of 50-100 ps. We built a 260 μm × 10 gaps MRPC with an active area of 10 × 50 cm2 and a pad size of 2.5 × 40 cm2. We studied the trigger rate dependence and the gas mixture of this MRPC. It was found that high enough voltage is necessary to achieve a good time resolution and high efficiency at large trigger rates. The gas mixture composed of R134a : SF6 : Iso-Butane at 90% : 5% : 5% is our optimized choice. |
| ISSN | /1824-8039 |