Cosmic ray tests of a GEM-based TPC prototype operated in Ar-CF4-isobutane gas mixtures: II

M. Kobayashi , R. Yonamine , T. Tomioka , A. Aoza , H. Bito , K. Fujii , T. Higashi , K. Hiramatsu

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K. Ikematsu A. Ishikawa Y. Kato H. Kuroiwa T. Matsuda O. Nitoh H. Ohta K. Sakai R.D. Settles A. Sugiyama H. Tsuji T. Watanabe H. Yamaoka T. Yazu

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classification ⚛️ physics.ins-det hep-ex

keywords gem-basedpad-rowprototyperesolutionaccountalonganglesangular

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The spatial resolution along the pad-row direction was measured with a GEM-based TPC prototype for the future linear collider experiment in order to understand its performance for tracks with finite projected angles with respect to the pad-row normal. The degradation of the resolution due to the angular pad effect was confirmed to be consistent with the prediction of a simple calculation taking into account the cluster-size distribution and the avalanche fluctuation.

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Cosmic ray tests of a GEM-based TPC prototype operated in Ar-CF4-isobutane gas mixtures: II

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