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arXiv 0904.4545physics.ins-det
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T2K实验侧面μ子距离探测器（SMRD）的带有WLS光纤/MPPC读出的Scintillator计数器

Scintillator counters with WLS fiber/MPPC readout for the side muon range detector (SMRD)of the T2K experiment

A. Izmaylov, S. Aoki, J. Blocki, J. Brinson, A. Dabrowska, I. Danko, M. Dziewiecki, B. Ellison, L. Golyshkin, R. Gould, T. Hara, B. Hartfiel, J. Holeczek, M. Kh… 展开作者

A. Izmaylov, S. Aoki, J. Blocki, J. Brinson, A. Dabrowska, I. Danko, M. Dziewiecki, B. Ellison, L. Golyshkin, R. Gould, T. Hara, B. Hartfiel, J. Holeczek, M. Khabibullin, A. Khotjantsev, D. Kielczewska, J. Kisiel, T. Kozlowski, Yu. Kudenko, R. Kurjata, T. Kutter, J. Lagoda, J. Liu, J. Marzec, W. Metcalf, P. Mijakowski, O. Mineev, Yu. Musienko, D. Naples, M. Nauman, D. Northacker, J. Nowak, V. Paolone, M. Posiadala, P. Przewlocki, J. Reid, E. Rondio, A. Shaykhiev, M. Sienkiewicz, D. Smith, J. Sobczyk, M. Stodulski, A. Straczek, R. Sulej, A. Suzuki, J. Swierblewski, T. Szeglowski, M. Szeptycka, T. Wachala, D. Warner, N. Yershov, T. Yano, A. Zalewska, K. Zaremba, M. Ziembicki

备注：
7 pages, 4 figures; talk at TIPP09, March 12-17, Tsukuba, Japan; to be published in the conference proceedings
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摘要：

J-PARC的T2 K中微子实验使用一组近探测器来测量非振荡中微子束的性质和中微子相互作用截面。本文介绍了近探测器复合体的子探测器之一--侧面μ子距离探测器（SMRD）。该探测器的目的是帮助测量中微子能谱，识别背景和校准其他探测器。SMRD的有源元件由插入UA 1磁轭气隙的0.7 cm厚挤出闪烁体板组成。通过嵌入蛇形槽中的单个WLS光纤提供每个闪烁体板的读出。两个Hamamatsu多像素雪崩光电二极管（MPPC）耦合到WLS光纤的两端。这种设计使我们能够实现大于99%的高MIP检测效率。光输出为25-50 p.e./ MIP，时间分辨率约为1 ns，空间分辨率优于10 cm。

英文摘要：

The T2K neutrino experiment at J-PARC uses a set of near detectors to measure the properties of an unoscillated neutrino beam and neutrino interaction cross-sections. One of the sub-detectors of the near-detector complex, the side muon range detector (SMRD), is described in the paper. The detector is designed to help measure the neutrino energy spectrum, to identify background and to calibrate the other detectors. The active elements of the SMRD consist of 0.7 cm thick extruded scintillator slabs inserted into air gaps of the UA1 magnet yokes. The readout of each scintillator slab is provided through a single WLS fiber embedded into a serpentine shaped groove. Two Hamamatsu multi-pixel avalanche photodiodes (MPPC's) are coupled to both ends of the WLS fiber. This design allows us to achieve a high MIP detection efficiency of greater than 99%. A light yield of 25-50 p.e./MIP, a time resolution of about 1 ns and a spatial resolution along the slab better than 10 cm were obtained for the SMRD counters.

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