A study with a small prototype TPC for the international linear collider experiment
A study with a small prototype TPC for the international linear collider experiment
复制标题
国际直线对撞机实验小型原型机TPC的研究
DOI：
10.1016/j.nima.2010.02.175
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发表时间：
2010
影响因子：
1.4
通讯作者：
R. Yonamine
中科院分区：
文献类型：
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作者：
K. Ackermann;S. Arai;D. Arogancia;A. Bacala;M. Ball;T. Behnke;H. Bito;V. Eckardt;K. Fujii;T. Fusayasu;N. Ghodbane;H. Gooc;T. Kijima;M. Hamann;M. Habu;R. Heuer;K. Hiramatsu;K. Ikematsu;A. Kaukher;H. Kuroiwa;M. Janssen;Y. Kato;M. Kobayashi;T. Kuhl;T. Lux;T. Matsuda;S. Matsushita;A. Miyazaki;K. Nakamura;O. Nitoh;H. Ohta;J. Pouthas;R. Reserva;P. Rosier;K. Sakai;N. Sakamoto;T. Sanuki;R. Settles;A. Sugiyama;Tadayuki Takahashi;T. Tomioka;H. Tsuji;T. Watanabe;P. Wienemann;R. Wurth;H. Yamaguchi;M. Yamaguchi;A. Yamaguchi;T. Yamamura;H. Yamaoka;T. Yazu;R. Yonamine
时间投影室（TPC）是国际直线对撞机（ILC）实验的中心跟踪器的强有力的候选者，我们已经在高达4T的磁场下进行了一系列宇宙线实验，使用具有可替换读出装置的小型TPC原型：多丝正比室（MWPC）或气体电子倍增器（GEM）。我们首先证实了在4 T的强轴向磁场下，MWPC读出不能作为ILC-TPC的后备选择，因为其空间分辨率严重受到线平面附近的所谓E x B效应的影响。GEM读出，另一方面，被发现是几乎免费的E x B效应，如预期的，并给出了由漂移电子的横向扩散（扩散限制）确定的分辨率。此外，与MWPC相比，GEM允许更广泛的气体混合物选择。在我们迄今为止尝试的气体中，Ar-CF 4-异丁烷的混合物，其中MWPC可能易于放电，似乎有希望作为ILC-TPC的工作气体，因为它的扩散常数小，特别是在强磁场下。我们报告测量的漂移特性的混合物，包括作为电场的函数的扩散常数，并将它们与Magboltz的预测进行比较。还介绍了根据原型测量估计的基于GEM的ILC-TPC的空间分辨率。
A time projection chamber (TPC) is a strong candidate for the central tracker of the international linear collider (ILC) experiment and we have been conducting a series of cosmic ray experiments under a magnetic field up to 4 T, using a small prototype TPC with a replaceable readout device: multi-wire proportional chamber (MWPC) or gas electron multiplier (GEM). We first confirmed that the MWPC readout could not be a fall-back option of the ILC-TPC under a strong axial magnetic field of 4 T since its spatial resolution suffered severely from the so called E x B effect in the vicinity of the wire planes. The GEM readout, on the other hand, was found to be virtually free from the E x B effect as had been expected and gave the resolution determined by the transverse diffusion of the drift electrons (diffusion limited). Furthermore, GEMs allow a wider choice of gas mixtures than MWPCs. Among the gases we tried so far a mixture of Ar-CF4-isobutane, in which MWPCs could be prone to discharges, seems promising as the operating gas of the ILC-TPC because of its small diffusion constant especially under a strong magnetic field. We report the measured drift properties of this mixture including the diffusion constant as a function of the electric field and compare them with the predictions of Magboltz. Also presented is the spatial resolution of a GEM-based ILC-TPC estimated from the measurement with the prototype.
具有标准读出垫的 Micromegas TPC 分辨率的光束测试研究
DOI：
--
发表时间：
2009
期刊：
Nuclear Instruments and Methods
影响因子：
--
作者：
D. C. Aroganica;…;A. Sugiyama(26番目);…;(計31名)
通讯作者：
(計31名)