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The hybrid energy spectrum of telescope array's Middle Drum Detector and surface array

ASTROPARTICLE PHYSICS 2015年 68卷 27-44页

作者： Abbasi, R. U. Abe, M. Abu-Zayyad, T. Allen, M. G. Anderson, R. Azuma, R. Barcikowski, E. Belz, J. W. Bergman, D. R. Blake, S. A. Cady, R. Chae, M. J. Cheon, B. G. Chiba, J. Chikawa, M. Cho, W. R. Fujii, T. Fukushima, M. Goto, T. Hanlon, W. Hayashi, Y. Hayashida, N. Hibino, K. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ishimori, R. Ito, H. Ivanov, D. Jui, C. C. H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kawai, H. Kawakami, S. Kawana, S. Kawata, K. Kido, E. Kim, H. B. Kim, J. H. Kim, J. H. Kitamura, S. Kitamura, Y. Kuzmin, V. Kwon, Y. J. Lan, J. Lim, S. I. Lundquist, J. P. Machida, K. Martens, K. Matsuda, T. Matsuyama, T. Matthews, J. N. Minamino, M. Mukai, K. Myers, I. Nagasawa, K. Nagataki, S. Nakamura, T. Nonaka, T. Nozato, A. Ogio, S. Ogura, J. Ohnishi, M. Ohoka, H. Oki, K. Okuda, T. Ono, M. Oshima, A. Ozawa, S. Park, I. H. Pshirkov, M. S. Rodriguez, D. C. Rubtsov, G. Ryu, D. Sagawa, H. Sakurai, N. Sampson, A. L. Scott, L. M. Shah, P. D. Shibata, F. Shibata, T. Shimodaira, H. Shin, B. K. Shin, H. S. Smith, J. D. Sokolsky, P. Springer, R. W. Stokes, B. T. Stratton, S. R. Stroman, T. A. Suzawa, T. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, H. Tanaka, K. Tanaka, M. Thomas, S. B. Thomson, G. B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsunesada, Y. Tsutsumi, K. Uchihori, Y. Udo, S. Urban, F. Vasiloff, G. Wong, T. Yamane, R. Yamaoka, H. Yamazaki, K. Yang, J. Yashiro, K. Yoneda, Y. Yoshida, S. Yoshii, H. Zollinger, R. Zundel, Z. Univ Utah Dept Phys & Astron High Energy Astrophys Inst Salt Lake City UT 84112 USA Tokyo Inst Technol Grad Sch Sci & Engn Meguro Ku Tokyo 152 Japan Ewha Womans Univ Inst Early Universe Dept Phys Seoul South Korea Hanyang Univ Res Inst Nat Sci Dept Phys Seoul 133791 South Korea Tokyo Univ Sci Dept Phys Noda Chiba 278 Japan Kinki Univ Dept Phys Higashiosaka Osaka 577 Japan Yonsei Univ Dept Phys Seoul 120749 South Korea Univ Tokyo Inst Cosm Ray Res Kashiwa Chiba Japan Univ Tokyo Todai Inst Adv Study Kavli Inst Phys & Math Universe WPI Kashiwa Chiba Japan Osaka City Univ Grad Sch Sci Osaka Osaka 558 Japan Kanagawa Univ Fac Engn Yokohama Kanagawa Japan Univ Yamanashi Interdisciplinary Grad Sch Med & Engn Kofu Yamanashi Japan Saitama Univ Grad Sch Sci & Engn Saitama Saitama 3388570 Japan RIKEN Astrophys Big Bang Lab Wako Saitama Japan Rutgers State Univ Dept Phys & Astron Piscataway NJ USA Tokyo City Univ Dept Phys Setagaya Ku Tokyo Japan Russian Acad Sci Inst Nucl Res Moscow 117312 Russia Waseda Univ Adv Res Inst Sci & Engn Shinjuku Ku Tokyo Japan Chiba Univ Dept Phys Chiba Chiba 260 Japan Natl Lab High Energy Phys KEK Inst Particle & Nucl Studies Tsukuba Ibaraki 305 Japan Kochi Univ Fac Sci Kochi Kochi 780 Japan Ritsumeikan Univ Dept Phys Sci Kusatsu Shiga Japan Sungkyunkwan Univ Dept Phys Suwon South Korea Univ Libre Bruxelles Serv Phys Theor Brussels Belgium Ulsan Natl Inst Sci & Technol UNIST Gil Sch Nat Sci Dept Phys Ulsan South Korea Univ Tokyo Earthquake Res Inst Bunkyo Ku Tokyo 113 Japan Hiroshima City Univ Grad Sch Informat Sci Hiroshima Hiroshima Japan Shinshu Univ Dept Comp Sci & Engn Nagano Nagano Japan Natl Inst Radiol Sci Chiba Chiba 260 Japan Ehime Univ Dept Phys Matsuyama Ehime Japan Chubu Univ Engn Sci Lab Kasugai Aichi 487 Japan Kyushu Univ Dept Phys Fukuoka Fukuoka 812 Japan Moscow MV Lomonosov State Univ Sternberg Astron Inst Moscow 119992 Russia

The telescope array experiment studies ultra high energy cosmic rays using a hybrid detector. Fluorescence telescopes measure the longitudinal development of the extensive air shower generated when a primary cosmic ray particle interacts with the atmosphere. Meanwhile, scintillator detectors measure the lateral distribution of secondary shower particles that hit the ground. The Middle Drum (MD) fluorescence telescope station consists of 14 telescopes from the High Resolution Fly's Eye (HiRes) experiment, providing a direct link back to the HiRes measurements. Using the scintillator detector data in conjunction with the telescope data improves the geometrical reconstruction of the showers significantly, and hence, provides a more accurate reconstruction of the energy of the primary particle. The Middle Drum hybrid spectrum is presented and compared to that measured by the Middle Drum station in monocular mode. Further, the hybrid data establishes a link between the Middle Drum data and the surface array. A comparison between the Middle Drum hybrid energy spectrum and scintillator Surface Detector (SD) spectrum is also shown. (C) 2015 Elsevier B.V. All rights reserved.

关键词： Cosmic rays Energy spectrum telescope array Hybrid Ultra high energy

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Study of Ultra-High Energy Cosmic Ray composition using telescope array's Middle Drum detector and surface array in hybrid mode

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ASTROPARTICLE PHYSICS 2015年 64卷 49-62页

作者： Abbasi, R. U. Abe, M. Abu-Zayyad, T. Allen, M. Anderson, R. Azuma, R. Barcikowski, E. Belz, J. W. Bergman, D. R. Blake, S. A. Cady, R. Chae, M. J. Cheon, B. G. Chiba, J. Chikawa, M. Cho, W. R. Fujii, T. Fukushima, M. Goto, T. Hanlon, W. Hayashi, Y. Hayashida, N. Hibino, K. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ishimori, R. Ito, H. Ivanov, D. Jui, C. C. H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kawai, H. Kawakami, S. Kawana, S. Kawata, K. Kido, E. Kim, H. B. Kim, J. H. Kim, J. H. Kitamura, S. Kitamura, Y. Kuzmin, V. Kwong, Y. J. Lan, J. Lim, S. Lundquist, J. P. Machida, K. Martens, K. Matsuda, T. Matsuyama, T. Matthews, J. N. Minamino, M. Mukai, Y. Myers, I. Nagasawa, K. Nagataki, S. Nakamura, T. Nonaka, T. Nozato, A. Ogio, S. Ogura, J. Ohnishi, M. Ohoka, H. Oki, K. Okuda, T. Ono, M. Oshima, A. Ozawa, S. Park, I. H. Pshirkov, M. S. Rodriguez, D. C. Rubtsov, G. Ryu, D. Sagawa, H. Sakurai, N. Sampson, A. L. Scott, L. M. Shah, P. D. Shibata, F. Shibata Shimodaira, H. Shin, B. K. Shin, H. S. Smith, J. D. Sokolsky, P. Springer, R. W. Stokes, B. T. Stratton, S. R. Stroman, T. Suzawa, T. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, H. Tanaka, K. Tanaka, M. Thomas, S. B. Thomson, G. B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsunesada, Y. Tsutsumi, K. Uchihori, Y. Udo, S. Urban, F. Vasiloff, G. Wong, T. Yamane, R. Yamaoka, H. Yamazaki, K. Yang, J. Yashiro, K. Yoneda, Y. Yoshida, S. Yoshii, H. Zollinger, R. Zundel, Z. Univ Utah High Energy Astrophys Inst Salt Lake City UT 84112 USA Univ Utah Dept Phys & Astron Salt Lake City UT USA Tokyo Inst Technol Grad Sch Sci & Engn Tokyo 152 Japan Ewha Womans Univ Dept Phys Seoul South Korea Ewha Womans Univ Inst Early Univ Seoul South Korea Hanyang Univ Dept Phys Seoul 133791 South Korea Hanyang Univ Res Inst Nat Sci Seoul 133791 South Korea Tokyo Univ Sci Dept Phys Noda Chiba Japan Kinki Univ Dept Phys Osaka Japan Univ Tokyo Inst Cosm Ray Res Kashiwa Chiba Japan Univ Tokyo Kavli Inst Phys Kashiwa Chiba Japan Univ Tokyo Todai Inst Adv Study Math Univ WPI Kashiwa Chiba Japan Osaka City Univ Grad Sch Sci Osaka Osaka Japan Kanagawa Univ Fac Engn Yokohama Kanagawa Japan Univ Yamanashi Interdisciplinary Grad Sch Med & Engn Kofu Yamanashi Japan Saitama Univ Grad Sch Sci & Engn Saitama Saitama Japan RIKEN Astrophys Big Bang Lab Wako Saitama Japan Rutgers State Univ Dept Phys & Astron Piscataway NJ USA Tokyo City Univ Dept Phys Setagaya Ku Tokyo Japan Russian Acad Sci Inst Nucl Res Moscow 117312 Russia Waseda Univ Adv Res Inst Sci & Engn Shinjuku Ku Tokyo Japan Chiba Univ Dept Phys Chiba Chiba Japan KEK Inst Particle & Nucl Studies Tsukuba Ibaraki Japan Kochi Univ Fac Sci Kochi Kochi Japan Ritsumeikan Univ Dept Phys Sci Shiga Japan Sungkyunkwan Univ Dept Phys Suwon South Korea Univ Libre Bruxelles Serv Phys Thear Brussels Belgium Ulsan Natl Inst Sci & Technol Sch Nat Sci Dept Phys Ulsan South Korea Univ Tokyo Earthquake Res Inst Bunkyo Ku Tokyo 113 Japan Hiroshima City Univ Grad Sch Informat Sci Hiroshima Hiroshima Japan RIKEN Adv Sci Inst Wako Saitama Japan Natl Inst Radiol Sci Chiba Chiba Japan Ehime Univ Dept Phys Matsuyama Ehime Japan Moscow MV Lomonosov State Univ Sternberg Astron Inst Moscow 119992 Russia Yonsei Univ Dept Phys Seoul 120749 South Korea

Previous measurements of the composition of Ultra-High Energy Cosmic Rays (UHECRs) made by the High Resolution Fly's Eye (HiRes) and Pierre Auger Observatory (PAO) are seemingly contradictory, but utilize different detection methods, as HiRes was a stereo detector and PAO is a hybrid detector. The five year telescope array (TA) Middle Drum hybrid composition measurement is similar in some, but not all, respects in methodology to PAO, and good agreement is evident between data and a light, largely protonic, composition when comparing the measurements to predictions obtained with the QGSJetII-03 and QGSJet-01 c models. These models are also in agreement with previous HiRes stereo measurements, confirming the equivalence of the stereo and hybrid methods. The data is incompatible with a pure iron composition, for all models examined, over the available range of energies. The elongation rate and mean values of X-max are in good agreement with Pierre Auger Observatory data. This analysis is presented using two methods: data cuts using simple geometrical variables and a new pattern recognition technique. (C) 2014 Elsevier B.V. All rights reserved.

关键词： Ultra-High Energy Cosmic Rays Cosmic ray composition Atmospheric fluorescence Extensive air shower array Hybrid telescope array

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Energy spectrum of ultra-high energy cosmic rays observed with the telescope array using a hybrid technique

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ASTROPARTICLE PHYSICS 2015年 61卷 93-101页

作者： Abu-Zayyad, T. Aida, R. Allen, M. Anderson, R. Azuma, R. Barcikowski, E. Belz, J. W. Bergman, D. R. Blake, S. A. Cady, R. Cheond, B. G. Chiba, J. Chikawa, M. Cho, E. J. Cho, W. R. Fujii, H. Fujii, T. Fukuda, T. Fukushima, M. Hanlon, W. Hayashi, K. Hayashi, Y. Hayashida, N. Hibino, K. Hiyama, K. Honda, K. Iguchi, T. Ikeda, D. Ikuta, K. Inoue, N. Ishii, T. Ishimori, R. Ito, H. Ivanov, D. Iwamoto, S. Jui, C. C. H. Kadota, K. Kakimoto, F. Kalashev, O. Kanbe, T. Kasahara, K. Kawai, H. Kawakami, S. Kawana, S. Kido, E. Kim, H. B. Kim, H. K. Kim, J. H. Kim, J. H. Kitamoto, K. Kitamura, S. Kitamura, Y. Kobayashi, K. Kobayashi, Y. Kondo, Y. Kuramoto, K. Kuzmin, V. Kwong, Y. J. Lan, J. Lim, S. I. Lundquist, J. P. Machida, S. Martens, K. Matsuda, T. Matsuura, T. Matsuyama, T. Matthews, J. N. Minamino, M. Miyata, K. Murano, Y. Myers, I. Nagasawa, K. Nagataki, S. Nakamura, T. Nam, S. W. Nonaka, T. Ogio, S. Ohnishi, M. Ohoka, H. Oki, K. Oku, D. Okuda, T. Ono, M. Oshima, A. Ozawa, S. Park, I. H. Pshirkov, M. S. Rodriguez, D. C. Roh, S. Y. Rubtsov, G. Ryu, D. Sagawa, H. Sakurai, N. Sampson, A. L. Scott, L. M. Shah, P. D. Shibata, F. Shibata, T. Shimodaira, H. Shin, B. K. Shin, J. I. Shirahama, T. Smith, J. D. Sokolsky, P. Springer, R. W. Stokes, B. T. Stratton, S. R. Stroman, T. Suzuki, S. Takahashi, Y. Takeda, M. Taketa, A. Takita, M. Tameda, Y. Tanaka, H. Tanaka, K. Tanaka, M. Thomas, S. B. Thomson, G. B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsunesada, Y. Tsutsumi, K. Tsuyuguchi, Y. Uchihori, Y. Udo, S. Ukai, H. Urban, F. Vasiloff, G. Wada, Y. Wong, T. Yamakawa, Y. Yamane, R. Yamaoka, H. Yamazaki, K. Yang, J. Yoneda, Y. Yoshida, S. Yoshii, H. Zhou, X. Zollinger, R. Zundel, Z. Univ Utah High Energy Astrophys Inst Salt Lake City UT USA Univ Utah Dept Phys & Astron Salt Lake City UT USA Univ Yamanashi Interdisciplinary Grad Sch Med & Engn Kofu Yamanashi Japan Tokyo Inst Technol Grad Sch Sci & Engn Meguro Tokyo Japan Hanyang Univ Dept Phys Seoul 133791 South Korea Hanyang Univ Res Inst Nat Sci Seoul 133791 South Korea Tokyo Univ Sci Dept Phys Noda Chiba 278 Japan Kinki Univ Dept Phys Higashi Osaka Osaka Japan Yonsei Univ Dept Phys Seoul 120749 South Korea KEK Inst Particle & Nucl Studies Tsukuba Ibaraki Japan Osaka City Univ Grad Sch Sci Osaka 558 Japan Univ Tokyo Inst Cosm Ray Res Kashiwa Chiba Japan Univ Tokyo Todai Inst Adv Study Kavli Inst Phys & Math Univ WPI Kashiwa Chiba Japan Kanagawa Univ Fac Engn Yokohama Kanagawa Japan Saitama Univ Grad Sch Sci & Engn Saitama 3388570 Japan Rutgers State Univ Dept Phys & Astron Piscataway NJ USA Tokyo City Univ Dept Phys Setagaya Ku Tokyo Japan Russian Acad Sci Inst Nucl Res Moscow 117312 Russia Waseda Univ Adv Res Inst Sci & Engn Shinjuku Ku Tokyo Japan Chiba Univ Dept Phys Chiba Japan Chungnam Natl Univ Dept Astron & Space Sci Taejon South Korea Ewha Womans Univ Dept Phys Seoul South Korea Ewha Womans Univ Inst Early Univ Seoul South Korea Kyoto Univ Yukawa Inst Theoret Phys Kyoto Japan Kochi Univ Fac Sci Kochi 780 Japan Ritsumeikan Univ Dept Phys Sci Kusatsu Shiga Japan Univ Libre Bruxelles Serv Phys Theor Brussels Belgium Univ Tokyo Earthquake Res Inst Bunkyo Ku Tokyo 113 Japan Hiroshima City Univ Dept Phys Hiroshima Japan RIKEN Adv Sci Inst Wako Saitama Japan Natl Inst Radiol Sci Chiba 260 Japan Ehime Univ Dept Phys Matsuyama Ehime Japan

We measure the spectrum of cosmic rays with energies greater than 10(18.2) eV with the fluorescence detectors (FDs) and the surface detectors (SDs) of the telescope array Experiment using the data taken in our first 2.3-year observation from May 27, 2008 to September 7, 2010. A hybrid air shower reconstruction technique is employed to improve accuracies in determination of arrival directions and primary energies of cosmic rays using both FD and SD data. The energy spectrum presented here is in agreement with our previously published spectra and the HiRes results. (C) 2014 Elsevier B.V. All rights reserved.

关键词： Ultra-high energy cosmic rays telescope array Hybrid spectrum

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Ground-based tests of JEM-EUSO components at the telescope array site, "EUSO-TA"

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EXPERIMENTAL ASTRONOMY 2015年第1期40卷 301-314页

作者： Kawasaki, Yoshiya Piotrowski, Lech Wiktor Adams, J. H., Jr. Ahmad, S. Albert, J. -N. Allard, D. Anchordoqui, L. Andreev, V. Anzalone, A. Arai, Y. Asano, K. Pernas, M. Ave Baragatti, P. Barrillon, P. Batsch, T. Bayer, J. Bechini, R. Belenguer, T. Bellotti, R. Belov, K. Berlind, A. A. Bertaina, M. Biermann, P. L. Biktemerova, S. Blaksley, C. Blanc, N. Blecki, J. Blin-Bondil, S. Bluemer, J. Bobik, P. Bogomilov, M. Bonamente, M. Briggs, M. S. Briz, S. Bruno, A. Cafagna, F. Campana, D. Capdevielle, J-N. Caruso, R. Casolino, M. Cassardo, C. Castellini, G. Catalano, C. Catalano, O. Cellino, A. Chikawa, M. Christl, M. J. Cline, D. Connaughton, V. Conti, L. Cordero, G. Crawford, H. J. Cremonini, R. Csorna, S. Dagoret-Campagne, S. de Castro, A. J. de Donato, C. de la Taille, C. de Santis, C. del Peral, L. Dell'Oro, A. De Simone, N. Di Martino, M. Distratis, G. Dulucq, F. Dupieux, M. Ebersoldt, A. Ebisuzaki, T. Engel, R. Falk, S. Fang, K. Fenu, F. Fernandez-Gomez, I. Ferrarese, S. Finco, D. Flamini, M. Fornaro, C. Franceschi, A. Fujimoto, J. Fukushima, M. Galeotti, P. Garipov, G. Geary, J. Gelmini, G. Giraudo, G. Gonchar, M. Alvarado, C. Gonzalez Gorodetzky, P. Guarino, F. Guzman, A. Hachisu, Y. Harlov, B. Haungs, A. Carretero, J. Hernandez Higashide, K. Ikeda, D. Ikeda, H. Inoue, N. Inoue, S. Insolia, A. Isgro, F. Itow, Y. Joven, E. Judd, E. G. Jung, A. Kajino, F. Kajino, T. Kaneko, I. Karadzhov, Y. Karczmarczyk, J. Karus, M. Katahira, K. Kawai, K. Kawasaki, Y. Keilhauer, B. Khrenov, B. A. Kim, Jeong-Sook Kim, Soon-Wook Kim, Sug-Whan Kleifges, M. Klimov, P. A. Kolev, D. Kreykenbohm, I. Kudela, K. Kurihara, Y. Kusenko, A. Kuznetsov, E. Lacombe, M. Lachaud, C. Lee, J. Licandro, J. Lim, H. Lopez, F. Maccarone, M. C. Mannheim, K. Maravilla, D. Marcelli, L. Marini, A. Martinez, O. Masciantonio, G. Mase, K. Matev, R. Medina-Tanco, G. Mernik, T. Miyamoto, H. Miyazaki, Y. Mizumoto, Y. Modestino, G. Monaco, A. Monnier-Ragaigne, D. Rios, J. A. Morales de Los Moretto, C. Morozenko, V. S. Mot, B. Murakami, T. Nagano, M. Nagata, M. Nag RIKEN 2-1 Hirosawa Wako Saitama Japan Univ Sofia Sofia Bulgaria Univ Paris 11 CNRS IN2P3 LAL F-91405 Orsay France Ecole Polytech CNRS IN2P3 Omega F-91128 Palaiseau France Univ Paris Diderot Sorbonne Paris Cite CNRS Observ ParisIN2P3CEAAPCIrfu Paris France Univ Toulouse CNRS IRAP Toulouse France Univ Erlangen Nurnberg ECAP Nurnberg Germany Karlsruhe Inst Technol D-76021 Karlsruhe Germany Univ Munich Munich Germany Univ Tubingen Kepler Ctr Inst Astron & Astrophys Tubingen Germany Univ Wurzburg Inst Theoret Phys & Astrophys Wurzburg Germany Ist Nazl Fis Nucl Sez Bari Bari Italy Univ Bari Aldo Moro Bari Italy Ist Nazl Fis Nucl Sez Bari Bari Italy Univ Catania Dipartimento Fis & Astron I-95124 Catania Italy CNR Ist Fis Applicata Nello Carrara Florence Italy Ist Nazl Fis Nucl Lab Nazl Frascati Frascati Italy Ist Nazl Fis Nucl Sez Napoli Naples Italy Univ Naples Federico II Dipartimento Sci Fis Naples Italy INAF Ist Astrofis Spaziale & Fis Cosm Palermo Palermo Italy Ist Nazl Fis Nucl Sez Roma Tor Vergata Rome Italy Univ Roma Tor Vergata Dipartimento Fis I-00173 Rome Italy Ist Nazl Fis Nucl Sez Torino Turin Italy Univ Turin Dipartimento Fis I-10124 Turin Italy Osservatorio Astrofis Torino Ist Nazl Astrofis Turin Italy Ist Nazl Fis Nucl Sez Catania Catania Italy UTIU Dipartimento Ingn Rome Italy Univ Naples Federico II DIETI Naples Italy Chiba Univ Chiba Japan Natl Inst Radiol Sci Chiba 260 Japan Fukui Univ Technol Fukui Japan Kinki Univ Higashiosaka Osaka 577 Japan Hiroshima Univ Hiroshima Japan Kanazawa Univ Kanazawa Ishikawa Japan Univ Tokyo Inst Cosm Ray Res Kashiwa Chiba Japan Kobe Univ Kobe Hyogo 657 Japan Konan Univ Kobe Hyogo Japan Kyoto Univ Kyoto Japan Kyoto Univ Yukawa Inst Kyoto Japan Natl Astron Observ Mitaka Tokyo 181 Japan Nagoya Univ Nagoya Aichi 4648601 Japan Nagoya Univ Solar Terr Environm Lab Nagoya Aichi 4648601 Japan Osaka City Univ Grad Sch Sci Osaka Japan Inst Space

We are conducting tests of optical and electronics components of JEMEUSO at the telescope array site in Utah with a ground-based "EUSO-TA" detector. The tests will include an engineering validation of the detector, cross-calibration of EUSO-TA with the TA fluorescence detector and observations of air shower events. Also, the proximity of the TA's Electron Light Source will allow for convenient use of this calibration device. In this paper, we report initial results obtained with the EUSO-TA telescope.

关键词： JEM-EUSO EUSO-TA telescope array Ultra high energy cosmic rays

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Fiber-to-the-telescope: MeerKAT, the South African precursor to Square Kilometre telescope array

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JOURNAL OF ASTRONOMICAL telescopeS INSTRUMENTS AND SYSTEMS 2015年第2期1卷

作者： Gibbon, Tim B. Kipnoo, Enoch K. Rotich Gamatham, Romeo R. G. Leitch, Andrew W. R. Siebrits, Renier Julie, Roufurd Malan, Sias Rust, Warnich Kapp, Francois Venkatasubramani, Thondikulam L. Wallace, Bruce Peens-Hough, Adriaan Herselman, Paul NMMU Dept Phys Opt Fibre Res Unit POB 77000 ZA-6031 Port Elizabeth South Africa Square Kilometer Array ZA-7405 Pinelands South Africa

Scientific curiosity to probe the nature of the universe is pushing the boundaries of big data transport and computing for radio telescopes. MeerKAT, the South African precursor to Square Kilometre array, has 64 antennas separated by up to 12 km. By 2018, each antenna will stream up to 160 Gbps over optical fiber to a central computing engine. The antenna digitizers require highly accurate clock signals distributed with high stability. This paper outlines requirements and key design aspects of the MeerKAT network with timing reference overlay. Fieldwork results are presented into the impact of birefringence and polarization fluctuations on clock stability. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： MeerKAT Square Kilometre array telescope array optical fiber

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Space borne nulling interferometry with non-rotating telescope arrays

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ENGINEERING RESEARCH EXPRESS 2023年第2期5卷 025042-025042页

作者： Henault, Francois Univ Grenoble Alpes Inst Planetol & Astrophys Grenoble Ctr Natl Rech Sci BP 53 F-38041 Grenoble France

Spaceborne nulling interferometry in the mid-infrared waveband is one of the most promising techniques for characterizing the atmospheres of extra-solar planets orbiting in the habitable zone of their parent star and possibly discovering life markers. One of the most difficult challenges is the control of a free-flying telescope spacecraft moving around a central combiner to modulate the planet signal. Moreover, the entire array must be reconfigured regularly to observe different celestial targets, thus increasing the risk of losing one or more spacecraft and aborting the mission before its normal end. This paper describes a simplified optical configuration in which the telescopes do not need to be rotated and the number of necessary array reconfigurations is minimized. It allows efficient modulation of the planet signal, using only making use of rotating prisms or mirrors located in the central combiner. The general principle of a Nulling interferometer with a fixed telescope array is explained. Mathematical relationships were established to determine the planet modulation signal. Numerical simulations were performed for three different arrangements of collecting telescopes. They confirmed that nulling interferometry in space did not require a rotating telescope array.

关键词： nulling interferometry space interferometer telescope array extrasolar planets

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Link design of Moon-to-Earth optical communication based on telescope array receivers

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OPTICS COMMUNICATIONS 2014年 310卷 12-18页

作者： Wang, Xiaorui Guo, Lei Zhang, Lincong Liu, Yejun Northeastern Univ Coll Informat Sci & Engn Shenyang 110819 Peoples R China

Optical communication technology shows promising prospects to fulfill the large bandwidth requirements of future deep-space exploration. This paper mainly studies the link design of Moon-to-Earth optical communication based on the telescope array receiver. Firstly, we analyze and design the telescope array model. An array of relatively small-sized telescope combined to form a larger synthesized aperture is a viable and efficient alternative to a large monolithic telescope. Moreover, this array structure also saves the total costs of the telescopes. In addition, we present an end-to-end system analysis to provide the expected signal and background photons as a function of the Moon Earth distance. Then, we describe the work on the link design of the Moon-to-Earth optical communication. This primarily includes the received power, the antenna gain, the space loss, the atmospheric loss, and so on. We also provide an approximation calculation to the channel capacity, the data rate, the bit error ratio (BER) and signal-to-noise ratio (SNR). This demonstrates much theoretical significance on the actual Moon-to-Earth optical communication. (C) 2013 Elsevier B.V. All rights reserved.

关键词： Moon-to-Earth optical communication telescope array Link design Antenna gain Bit error ratio (BER) Signal-to-noise ratio (SNR)

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Medium-Sized telescopes for the Cherenkov telescope array 5

Medium-Sized Telescopes for the Cherenkov Telescope Array

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Conference on Ground-Based and Airborne telescopes V

作者： Schlenstedt, Stefan DESY Hamburg Germany

ISBN: (纸本)9780819496133

CTA, the Cherenkov telescope array, is the next generation ground-based observatory for gamma-ray astronomy in the energy range from 20 GeV to 300 TeV. The sensitivity in the core energy range will be dominated by up to 40 Medium-Sized telescopes. These telescopes, of Davies-Cotton type with a reflector with a diameter of 12 m, are currently in the prototype phase. A full-size mechanical prototype with drive system has been constructed in Berlin. Different prototype mirrors have been developed, tested and are mounted on the prototype. Two camera types are designed and prototyped. Demonstrator cameras were built and are tested;the integration of these cameras on the prototype is prepared. A report on all aspects of the design, commissioning and performance of the Medium-Sized telescopes and their main components will be given.

关键词： telescope array telescopes Cameras PROTOTYPE GAMMA RAY ASTRONOMY drive train reflectors ENERGY RANGE

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Status of the Cherenkov telescope array Project 5

Status of the Cherenkov Telescope Array Project

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Conference on Ground-Based and Airborne telescopes V

作者： Schlenstedt, Stefan DESY Hamburg Germany

ISBN: (纸本)9780819496133

CTA, the Cherenkov telescope array, is the next generation ground-based observatory for gamma-ray astronomy in the energy range from 20 GeV to 300 TeV. The CTA project is finishing its preparatory phase, and the pre-production phase will start in 2014. The expected performance of CTA has been assessed using very detailed simulations. The science cases for CTA were established and the key physics programs are defined. A report on the design and prototypes of the different telescopes will be given. Plans for array control, data acquisition and data management are well advanced and will be presented here. Several site candidates for CTA on the Southern and Northern have been evaluated, and a site decision will be taken in 2014.

关键词： CENTRAL TRAINING ACADEMY telescope array GAMMA RAY ASTRONOMY production stage Status Data management ENERGY RANGE

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Fibre-to-the-telescope: MeerKAT, the South African precursor to Square Kilometre telescope array (SKA)

Fibre-to-the-telescope: MeerKAT, the South African precursor...

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Conference on Optical Metro Networks and Short-Haul Systems VI

作者： Gibbon, T. B. Rotich, E. K. Kourouma, H. Y. S. Gamatham, R. R. G. Leitch, A. W. R. Siebrits, R. Julie, R. Malan, S. Rust, W. Kapp, F. Venkatasubramani, T. L. Wallace, B. Peens-Hough, A. Herselman, P. NMMU Dept Phys Eastern Cape South Africa MeerKAT Engn Off Square Kilometre Array South Africa Org Cape Town South Africa

ISBN: (纸本)9780819499219

Scientific curiosity to probe the nature of the universe is pushing boundaries of big data transport and computing for radio telescopes. MeerKAT, the South African precursor to Square Kilometre array (SKA), has 64 antennae separated by up to 12 km. By 2018, each antenna will stream up to 160 Gbps over optical fibre to a central computing engine. The antennae digitizers require highly accurate clock signals distributed with high stability. This paper outlines requirements and key design aspects of the MeerKAT network with timing reference overlay. Fieldwork results are presented into the impact of birefringence and polarization fluctuations on clock stability.

关键词： MeerKAT Square Kilometre array telescope array optical fibre

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