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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research >Development of an extremely thin-wall straw tracker operational in vacuum - The COMET straw tracker system
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Development of an extremely thin-wall straw tracker operational in vacuum - The COMET straw tracker system

机译：开发可在真空中运行的超薄壁秸秆跟踪器-COMET秸秆跟踪器系统

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摘要

The COMET experiment at J-PARC aims to search for a lepton-flavour violating process of muon to electron conversion in a muonic atom, μ-e conversion, with a branching-ratio sensitivity of better than 10~(-16), 4 orders of magnitude better than the present limit, in order to explore the parameter region predicted by most of well-motivated theoretical models beyond the Standard Model. The need for this sensitivity places several stringent requirements on the detector development. The experiment requires to detect the monochromatic electron of 105 MeV, the momentum resolution is primarily limited by the multiple scattering effect for this momentum region. Thus we need the very light material detector in order to achieve an excellent momentum resolution, better than 2%, for 100 MeV region. In order to fulfil such a requirement, the thin-wall straw-tube planar tracker has been developed by an extremely light material which is operational in vacuum. The COMET straw tracker consists of 9.8 mm diameter straw tube, longer than 1 m length, with 20-μm-thick Mylar foil and 70-nm-thick aluminium deposition. Currently even thinner and smaller, 12 μm thick and 5 mm diameter, straw is under development by the ultrasonic welding technique.
机译：J-PARC的COMET实验旨在寻找μ-e转换，从而使μ-e转换达到μ-e转换，其分支比率灵敏度优于10〜（-16），4个数量级为了探索由标准模型以外的大多数有良好动力的理论模型预测的参数区域，其数量级要比当前限制好。对这种灵敏度的需求对检测器的发展提出了一些严格的要求。实验要求检测105 MeV的单色电子，动量分辨率主要受此动量区域的多重散射效应限制。因此，我们需要非常轻的材料探测器，以便在100 MeV的区域内获得优于2％的出色动量分辨率。为了满足这样的要求，薄壁吸管平面跟踪器是由在真空中工作的极轻的材料制成的。 COMET秸秆跟踪器由直径9.8 mm的秸秆管组成，长度超过1 m，并具有20μm厚的Mylar箔和70 nm厚的铝沉积层。目前，通过超声波焊接技术正在开发越来越薄，更小，厚度为12μm，直径为5mm的稻草。

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    H. Nishiguchi; P. Evtoukhovitch; Y. Fujii; E. Hamada; S. Mihara; A. Moiseenko; K. Noguchi; K. Oishi; S. Tanaka; J. Tojo; Z. Tsamalaidze; N. Tsverava; K. Ueno; A. Volkov;

  • 作者单位

    High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan;

    Joint Institute for Nuclear Research (JINR), Jolio-Curie Str.6, Dubna, Moscow 141980, Russia;

    Institute of High Energy Physics (IHEP),19B YuquanLu, Shijingshan district, Beijing 1000049, China;

    High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan;

    High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan;

    Joint Institute for Nuclear Research (JINR), Jolio-Curie Str.6, Dubna, Moscow 141980, Russia;

    Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;

    Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;

    Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;

    Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;

    Joint Institute for Nuclear Research (JINR), Jolio-Curie Str.6, Dubna, Moscow 141980, Russia;

    Joint Institute for Nuclear Research (JINR), Jolio-Curie Str.6, Dubna, Moscow 141980, Russia;

    High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan;

    Joint Institute for Nuclear Research (JINR), Jolio-Curie Str.6, Dubna, Moscow 141980, Russia;

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  • 正文语种 eng
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  • 关键词

    Gas detector; Straw chamber; Tracker; Low-mass detector;

    机译：气体检测仪;秸秆室追踪器;低质量探测器;

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