Surface detectors of the TAx4 experiment

Telescope Array Collaboration: R.U. Abbasi (1); M. Abe (2); T.; Abu-Zayyad (1,3); M. Allen (3); Y. Arai (4); E. Barcikowski (3); J.W. Belz; (3); D.R. Bergman (3); S.A. Blake (3); R. Cady (3); B.G. Cheon (5); J. Chiba; (6); M. Chikawa (7); T. Fujii (8); K. Fujisue (7); K. Fujita (4); R. Fujiwara; (4); M. Fukushima (7,9); R. Fukushima (4); G. Furlich (3); W. Hanlon (3); M.; Hayashi (10); N. Hayashida (11); K. Hibino (11); R. Higuchi (7); K. Honda; (12); D. Ikeda (11); T. Inadomi (13); N. Inoue (2); T. Ishii (12); H. Ito; (14); D. Ivanov (3); H. Iwakura (13); H.M. Jeong (15); S. Jeong (15); C.C.H.; Jui (3); K. Kadota (16); F. Kakimoto (11); O. Kalashev (17); K. Kasahara; (18); S. Kasami (19); H. Kawai (20); S. Kawakami (4); S. Kawana (2); K.; Kawata (7); E. Kido (14); H.B. Kim (5); J.H. Kim (3); J.H. Kim (3); M.H. Kim; (15); S.W. Kim (15); Y. Kimura (4); S. Kishigami (4); V. Kuzmin (17); M.; Kuznetsov (17,21); Y.J. Kwon (22); K.H. Lee (15); B. Lubsandorzhiev (17),; J.P. Lundquist (3); K. Machida (12); H. Matsumiya (4); T. Matsuyama (4); J.N.; Matthews (3); R. Mayta (4); M. Minamino (4); K. Mukai (12); I. Myers (3); S.; Nagataki (14); K. Nakai (4); R. Nakamura (13); T. Nakamura (23); Y. Nakamura; (13); T. Nonaka (7); H. Oda (4); S. Ogio (4,24); M. Ohnishi (7); H. Ohoka; (7); Y. Oku (19); T. Okuda (25); Y. Omura (4); M. Ono (14); R. Onogi (4); A.; Oshima (4); S. Ozawa (26); I.H. Park (15); M.S. Pshirkov (17,27); J.; Remington (3); D.C. Rodriguez (3); G.I. Rubtsov (17); D. Ryu (28); H. Sagawa; (7); R. Sahara (4); Y. Saito (13); N. Sakaki (7); T. Sako (7); N. Sakurai; (4); K. Sano (13); K. Sato (4); T. Seki (13); K. Sekino (7); P.D. Shah (3),; F. Shibata (12); N. Shibata (19); T. Shibata (7); H. Shimodaira (7); B.K.; Shin (28); H.S. Shin (7); D. Shinto (19); J.D. Smith (3); P. Sokolsky (3); N.; Sone (13); B.T. Stokes (3); T.A. Stroman (3); T. Suzawa (2); Y. Takagi (4),; Y. Takahashi (4); M. Takamura (6); M. Takeda (7); R. Takeishi (7); A. Taketa; (29); M. Takita (7); Y. Tameda (19); H. Tanaka (4); K. Tanaka (30); M. Tanaka; (31); Y. Tanoue (4); S.B. Thomas (3); G.B. Thomson (3); P. Tinyakov (17,21),; I. Tkachev (17); H. Tokuno (32); T. Tomida (13); S. Troitsky (17); R. Tsuda; (4); Y. Tsunesada (4,24); Y. Uchihori (33); S. Udo (11); T. Uehama (13); F.; Urban (34); T. Wong (3); K. Yada (7); M. Yamamoto (13); K. Yamazaki (11); J.; Yang (35); K. Yashiro (6); F. Yoshida (19); Y. Zhezher (7,17); Z. Zundel (3); ((1) Department of Physics; Loyola University Chicago; Chicago; Illinois,; USA; (2) The Graduate School of Science; Engineering; Saitama University,; Saitama; Saitama; Japan; (3) High Energy Astrophysics Institute and; Department of Physics; Astronomy; University of Utah; Salt Lake City,; Utah; USA; (4) Graduate School of Science; Osaka City University; Osaka,; Osaka; Japan; (5) Department of Physics; The Research Institute of Natural; Science; Hanyang University; Seongdong-gu; Seoul; Korea; (6) Department of; Physics; Tokyo University of Science; Noda; Chiba; Japan; (7) Institute for; Cosmic Ray Research; University of Tokyo; Kashiwa; Chiba; Japan; (8) The; Hakubi Center for Advanced Research; Graduate School of Science; Kyoto; University; Kitashirakawa-Oiwakecho; Sakyo-ku; Kyoto; Japan; (9) Kavli; Institute for the Physics; Mathematics of the Universe (WPI); Todai; Institutes for Advanced Study; University of Tokyo; Kashiwa; Chiba; Japan,; (10) Information Engineering Graduate School of Science; Technology,; Shinshu University; Nagano; Nagano; Japan; (11) Faculty of Engineering,; Kanagawa University; Yokohama; Kanagawa; Japan; (12) Interdisciplinary; Graduate School of Medicine; Engineering; University of Yamanashi; Kofu,; Yamanashi; Japan; (13) Academic Assembly School of Science; Technology; Institute of Engineering; Shinshu University; Nagano; Nagano; Japan; (14); Astrophysical Big Bang Laboratory; RIKEN; Wako; Saitama; Japan; (15); Department of Physics; Sungkyunkwan University; Jang-an-gu; Suwon; Korea,; (16) Department of Physics; Tokyo City University; Setagaya-ku; Tokyo; Japan,; (17) Institute for Nuclear Research of the Russian Academy of Sciences,; Moscow; Russia; (18) Faculty of Systems Engineering; Science; Shibaura; Institute of Technology; Minato-ku; Tokyo; Japan; (19) Department of; Engineering Science; Faculty of Engineering; Osaka Electro-Communication; University; Neyagawa-shi; Osaka; Japan; (20) Department of Physics; Chiba; University; Chiba; Chiba; Japan; (21) Service de Physique Theorique,; Universite Libre de Bruxelles; Brussels; Belgium; (22) Department of Physics,; Yonsei University; Seodaemun-gu; Seoul; Korea; (23) Faculty of Science; Kochi; University; Kochi; Kochi; Japan; (24) Nambu Yoichiro Institute of Theoretical; and Experimental Physics; Osaka City University; Osaka; Osaka; Japan; (25); Department of Physical Sciences; Ritsumeikan University; Kusatsu; Shiga,; Japan; (26) Quantum ICT Advanced Development Center; National Institute for; Information; Communications Technology; Koganei; Tokyo; Japan; (27); Sternberg Astronomical Institute; Moscow M.V. Lomonosov State University,; Moscow; Russia; (28) Department of Physics; School of Natural Sciences; Ulsan; National Institute of Science; Technology; UNIST-gil; Ulsan; Korea; (29); Earthquake Research Institute; University of Tokyo; Bunkyo-ku; Tokyo; Japan,; (30) Graduate School of Information Sciences; Hiroshima City University,; Hiroshima; Hiroshima; Japan; (31) Institute of Particle; Nuclear Studies,; KEK; Tsukuba; Ibaraki; Japan; (32) Graduate School of Science and; Engineering; Tokyo Institute of Technology; Meguro; Tokyo; Japan; (33); Department of Research Planning; Promotion; Quantum Medical Science; Directorate; National Institutes for Quantum; Radiological Science and; Technology; Chiba; Chiba; Japan; (34) CEICO; Institute of Physics; Czech; Academy of Sciences; Prague; Czech Republic; (35) Department of Physics and; Institute for the Early Universe; Ewha Womans University; Seodaaemun-gu,; Seoul; Korea)

arXiv:2103.01086·astro-ph.IM·October 27, 2021

Surface detectors of the TAx4 experiment

Telescope Array Collaboration: R.U. Abbasi (1), M. Abe (2), T., Abu-Zayyad (1,3), M. Allen (3), Y. Arai (4), E. Barcikowski (3), J.W. Belz, (3), D.R. Bergman (3), S.A. Blake (3), R. Cady (3), B.G. Cheon (5), J. Chiba, (6), M. Chikawa (7), T. Fujii (8), K. Fujisue (7)

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TL;DR

This paper describes the design, motivation, and current status of the TAx4 surface detector array, an expansion of the Telescope Array experiment aimed at increasing data collection for ultrahigh energy cosmic-ray research.

Contribution

It introduces the TAx4 surface detector array, detailing its design, technical features, and expected performance to enhance cosmic-ray data collection.

Findings

01

TAx4 has begun data collection with initial results.

02

The array is designed to increase data rate for UHECR studies.

03

Preliminary data shows promising detection capabilities.

Abstract

Telescope Array (TA) is the largest ultrahigh energy cosmic-ray (UHECR) observatory in the Northern Hemisphere. It explores the origin of UHECRs by measuring their energy spectrum, arrival-direction distribution, and mass composition using a surface detector (SD) array covering approximately 700 km $^{2}$ and fluorescence detector (FD) stations. TA has found evidence for a cluster of cosmic rays with energies greater than 57 EeV. In order to confirm this evidence with more data, it is necessary to increase the data collection rate.We have begun building an expansion of TA that we call TAx4. In this paper, we explain the motivation, design, technical features, and expected performance of the TAx4 SD. We also present TAx4's current status and examples of the data that have already been collected.

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