Development of the laser calibration system of the charged particle detector for hadron photo production

2013 Fiscal Year Final Research Report

• Project/Area Number: 24740164
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyoto University
• Principal Investigator: NIIYAMA Masayuki 京都大学, 理学(系)研究科(研究院), 助教 (90455361)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: ハドロン物理 / エキゾチックハドロン / 検出器開発

Research Abstract

The internal structure of baryons are one of the most important issue in the hadron physics. Ordinary baryons have been believed consists of three constituent quarks. The L(1405) is a candidate of a baryon with five constituent quarks. The internal structure of the L(1405) can be studied from the spatial distribution of the wave function. For this measurement, it is essentially important to detect decay products of L(1405), however due to the non-uniform magnetic and electric field, the momentum resolution of the detector was deteriorated. In this study, we developed a laser calibration system of the detector and low noise amplifiers to improve the momentum resolution of the detector. We confirmed that the calibration system and new readout electronics have sufficiently good performance. The data taking with this detector and calibration system are on-going. The results of the development were reported at international conferences.

Research Products

• [Journal Article] Recent results of LEPS, ELPH and prospects of LEPS2 (2014)
  • Author(s): M. Niiyama
  • Journal Title: PoS Volume: Hadron2013 Pages: 022
  • Peer Reviewed
• [Journal Article] Development of a GEM-TPC for H-dibaryon search experiment at J-PARC (2014)
  • Author(s): H. Sako, J.K. Ahn, K.H. Baek, B. Bassalleck, H. Fujioka, L. Guo, S. Hasegawa, K. Hicks, R. Honda, S.H. Hwang, Y. Ichikawa, M. Ieiri, K. Imai, S.H. Kim, R. Kiuchi, H.S. Lee, K. Nakazawa, M. Naruki, A. Ni , M. Niiyama, K. Ozawa, J.Y. Park, S.Y. Ryu, S. Sato, K. Shirotori, H. Sugimura, M. Sumihara, K. Tanida, H. Takahashi, T. Takahashi
  • Journal Title: JINST Volume: 9 Pages: C04009
• [Journal Article] Search for K−pp bound state viaγd→K+π−X reaction at Eγ=1.5−2.4 GeV (2014)
  • Author(s): A.O. Tokiyasu , M. Niiyama, J.D. Parker, D.S. Ahn, J.K. Ahn, S. Ajimura, H. Akimune, Y. Asano, W.C. Chang, J.Y. Chen, S. Daté, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, S. Hasegawa, K. Hicks, K. Horie, T. Hotta, S.H. Hwang, K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. Kawai, K. Kino, H. Kohri, Y. Kon, N. Kumagai, D.L. Lin, Y. Maeda, S. Makino, T. Matsuda, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, M. Miyachi, N. Muramatsu, R. Murayama, T. Nakano, Y. Nakatsugawa, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ohta, T. Ooba, D.S. Oshuev, C. Rangacharyulu, S.Y. Ryu, A. Sakaguchi, T. Sawada, P.M. Shagin, Y. Shiino, H. Shimizu, E.A. Strokovsky, Y. Sugaya, M. Sumihama, J.L. Tang, Y. Toi, H. Toyokawa, T. Tsunemi, M. Uchida, M. Ungaro, A. Wakai, C.W. Wang, S.C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R.G.T. Zegers
  • Journal Title: Phys. Lett. Volume: B728 Pages: 616
  • Peer Reviewed
• [Journal Article] Recent results from LEPS and prospects of LEPS II at SPring-8 (2013)
  • Author(s): M. Niiyama
  • Journal Title: Nucl.Phys. Volume: A914 Pages: 543
  • Peer Reviewed
• [Journal Article] Development of large readout area, high time resolution RPCs for LEPS2 at SPring-8 (2012)
  • Author(s): N. Tomida, C.Y. Hsieh, M. Niiyama, H. Ohnishi, W.C. Chang, T. Hashimoto, H. Hamano, K. Mizutani
  • Journal Title: PoS Volume: RPC2012 Pages: 017
  • Peer Reviewed
• [Journal Article] Recent results from LEPS and prospects of LEPS II at SPring-8 (2012)
  • Author(s): M. Niiyama
  • Journal Title: EPJ Web Conf. Volume: 37 Pages: 01006
• [Journal Article] Trigger rate dependence and gas mixture of MRPC for the LEPS2 experiment at SPring-8 (2012)
  • Author(s): H.Chia-Yu, N.Tomida, H.Ohnishi, M.Niiyama, C.Wen-Chen, L.W. Tsung-Tai
  • Journal Title: PoS Volume: RPC2012 Pages: 061
  • Peer Reviewed
• [Journal Article] High time resolution RPCs with different readout geometries (2012)
  • Author(s): N. Tomida, C.Y. Hsieh, M. Niiyama, H. Ohnishi, W.C. Chang, T. Hashimoto, H. Hamano, K. Mizutani
  • Journal Title: JINST Volume: 7 Pages: P12005
  • Peer Reviewed
• [Journal Article] Search for theΘ+ pentaquark via theπ−p→K−X reaction at 1.92 GeV/c (2012)
  • Author(s): Shirotori, T.N. Takahashi, S. Adachi, M. Agnello, S. Ajimura, K. Aoki, H.C. Bhang, B. Bassalleck, E. Botta, S. BufalinoN. Chiga, P. Evtoukhovitch, A. Feliciello, H. Fujioka, F. Hiruma, R. Honda, K. Hosomi, Y. Ichikawa, M. Ieiri, Y. Igarashi, K. Imai, N. Ishibashi, S. Ishimoto, K. Itahashi, R. Iwasaki, C.W. Joo, M.J. Kim, S.J. Kim, R. Kiuchi, T. Koike, Y. Komatsu, V.V. Kulikov, S. Marcello, S. Masumoto, K. Matsuoka, K. Miwa, M. Moritsu, T. Nagae, M. Naruki, M. Niiyama, H. Noumi, K. Ozawa, N. Saito, A. Sakaguchi, H. Sako, V. Samoilov, M. Sato, S. Sato, Y. Sato, S. Sawada, M. Sekimoto, H. Sugimura, S. Suzuki, H. Takahashi, T. Takahashi, H. Tamura, T. Tanaka, K. Tanida, A.O. Tokiyasu, N. Tomida, Z. Tsamalaidze, M. Ukai, K. Yagi, T.O. Yamamoto, S.B. Yang, Y. Yonemoto, C.J. Yoon, K. Yoshida
  • Journal Title: Phys. Rev. Lett. Volume: 109 Pages: 132002
  • Peer Reviewed
• [Journal Article] Spin-Density Matrix Elements forγp→K∗0Σ+ at Eγ=1.85−3.0 GeV with Evidence for theκ(800) Meson Exchange (2012)
  • Author(s): S.H. Hwang, K.Hicks, J.K. Ahn, T. Nakano, D.S. Ahn, W.C. Chang, J.Y. Chen, S. Date, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, W. Gohn, T. Hotta, K. Imai, T. Ishikawa, K. Joo, Y. Kato, H. Kohri, Y. Kon, H.S. Lee, Y. Maeda, M. Miyabe, T. Mibe, Y. Morino, N. Muramatsu, Y. Nakatsugawa, M. Niiyama, H. Noumi, Y. Oh, Y. Ohashi, T. Ohta, M. Oka, J. Parker, C. Rangacharyulu, S.Y. Ryu, T. Sawada, Y. Sugaya, M. Sumihama, T. Tsunemi, M. Uchida, M.Ungaro, M. Yosoi
  • Journal Title: Phys. Rev. Lett. Volume: 108 Pages: 092001
  • Peer Reviewed
• [Presentation] Hadron physics with GeV photons at SPring-8/LEPS II (2013)
  • Author(s): M. Niiyama
  • Organizer: 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2013)
  • Place of Presentation: Rome, Itary
  • Year and Date: 20130930-1004
• [Presentation] Recent results from LEPS and prospects of LEPS II at SPring-8 (2012)
  • Author(s): M. Niiyama
  • Organizer: The 11th International Conference on Hypernuclear and Strange Particle Physics
  • Place of Presentation: Barcellona, Spain
  • Year and Date: 20121001-05
• [Presentation] Recent results from LEPS and prospects of LEPS II at SPring-8 (2012)
  • Author(s): M. Niiyama
  • Organizer: 12th International Workshop on Meson Production, Properties and Interaction
  • Place of Presentation: KRAKÓW, POLAND
  • Year and Date: 20120531-0605