CTA LST General Meeting

From Tuesday, 14 January 2014 to Friday, 17 January 2014


CTA-LST 国際ワークショップ主旨
高エネルギーガンマ線天文学を飛躍的に発展するすめるため、Cherenkov Telescope Array (CTA) 天文台建設に向け、その準備研究を進めています。CTA は従来の装置とくらべ、格段に高い感度を持ち、より広いエネルギー帯域を覆い、さらに優れた角度分解能とエネルギー分解能により全天を観測します。
中央に設置される 23m 大口径望遠鏡は 20GeV 以上のガンマ線観測を可能とし、z = 4 までの高赤方偏移の天体を観測することができます。大口径望遠鏡は 387m2 の巨大な反射鏡と高分解で高い量子効率の光センサーからなるカメラを搭載します。さらに、ガンマ線バーストの追観測を行なうため、高速で回転できるよう特殊な軽量構造をした望遠鏡は全重量が 70トン にデザインされているます。
CTA 大口径望遠鏡建設へ向けて、国際ワークシップを東京大学柏キャンパスの柏図書館メディアホールで開催いたします。ワークシップ初日の1月14日は様々なCTA でのサイエンス、暗黒物質探査などの基礎物理、銀河系内外の天体を対象としたガンマ線天文学について議論を行ない、15-17日は大口径望遠鏡の建設にむけて、最終的なデザイン・仕様について議論をおこないます。1月14日のサイエンスセッションはオープンですので、広く皆様の参加をお願いしたいと思います。


*本国際ワークショップは、東京大学宇宙線研究所および日本学術振興会 科研費特別推進研究#24000004 により支援されています。
The Cherenkov Telescope Array (CTA) is a new observatory for very high-energy (VHE) gamma rays. CTA has ambitious science goals, for which it is necessary to achieve full-sky coverage, to improve the sensitivity by about an order of magnitude, to span about four decades of energy, from a few tens of GeV to above 100 TeV with enhanced angular and energy resolutions over existing VHE gamma-ray observatories.
The CTA Large Size Telescope (LST) is designed to achieve observations of high redshift objects with the threshold energy of 20 GeV and is located at the center of the CTA array. The gamma-ray horizon will be expanded up to redshifts of z = 4 with low threshold energy LSTs. LSTs have a large mirror surface of 387 m2 and high resolution cameras with high quantum efficiency (high-QE) photomultipliers. The total weight of the telescope (70 tons) is minimized by the use of a lightweight structure and this permits the fast rotation of the telescope in follow-up observations of GRBs.
The international workshop CTA LST General Meeting will be held at Kashiwa campus of the University of Tokyo. In the workshop, the physics cases, i.e., Fundamental physics, Extragalactic and Galactic gamma-ray Astrophysics with CTA and CTA LSTs.cThe detailed design of LSTs is already in the advanced phase and the final design and optimization will be discussed in this workshop toward the construction of the CTA LSTs.
This international workshop is supported by the Institute for Cosmic Ray Research, the University of Tokyo, and JSPS Grants-in-Aid, the Specially Promoted Research #24000004.


Kashiwa Library, ICRR, University of Tokyo, Chiba/Japan ( Kashiwa Library Media Hall )
Address: Kashiwanoha 5-1-5, Kashiwa-Shi, Chiba 277-8582, Japan
ICRR Access Guide Page


Tuesday, 14 January 2014
09:00 - 09:30 Registration and Breakfast
09:30 - 11:10 Physics Discussion
Welcome Address and Introduction for the LST project
Prof. Masahiro Teshima (Max-Planck-Institute for Physics)
Fundamental Physics: Dark Matter Indirect Search
Prof. Kazunori Nakayama (The University of Tokyo)
Fundamental Physics: Sensitivity of CTA for Line Gammas
Dr. Susumu Inoue (Institute for Cosmic Ray Research, University of Tokyo)
Fundamental Physics: Updated LIV search results and the opportunities for the LST energy range
Dr. Robert Wagner (Stockholm University)
11:10 - 11:30 Coffee
11:30 - 13:00 Physics Discussion
Extragalactic: AGN Survey with CTA
Dr. Yoshiyuki Inoue (Stanford/SLAC)
Extragalactic: Extereme HBLs and UHECR
Dr. Hajime Takami (KEK)
Extragalactic: Multi Wavelength Study of AGNs in CTA era
Dr. David Paneque (Max Planck Institute)
13:00 - 14:00 Lunch
14:00 - 15:50 Physics Discussion
Extragalactic: EBL and evolution of the Universe
Daniel Mazin (MPI for Physics, Munich)
Extragalactic: VHE gamma-rays from Flat Spectrum Radio Quasars
Dr. Elina Lindfors (Tuorla Observatory, University of Turku)
Extragalactic: Star Burst Galaxies
Dr. Masaaki Hayashida (ICRR, Univ. of Tokyo)
Extragalactic: Polarimetric Tomography of Blazar Jets
Dr. Ulisses Barres de Almeida (Centro Brasileiro de Pesquisas Fisicas)
Extragalactic: GRB observation with CTA
Dr. Susumu Inoue (Institute for Cosmic Ray Research, University of Tokyo)
15:50 - 16:20 Coffee break
16:20 - 18:20 Physics Discussion
Galactic: Super Nova Remnants as cosmic ray sources
Dr. Yutaka Ohira (Aoyama Gakuin University)
Galactic: Modelling SNRs in Fermi and current IACT era and predictions for CTA
Prof. Pratik Majumdar (Saha Institute of Nuclear Physics, Kolkata, India)
Galactic: Study of Pulsars and Compact Objects in CTA Era
Dr. Takayuki Saito (Kyoto University)
Galactic: Key Observation Program with CTA
Dr. Emma de Ona Wilhelmi (IEEC-CSIC)
18:30 - 20:00 Welcome Dinner at Cafeteria
Wednesday, 15 January 2014
09:00 - 09:20 Registration and Breakfast
09:20 - 09:35 Welcome talk
09:35 - 10:50 Engineering Sessions: Camera
Introduction to Camera Status
Dr. Oscar Blanch Bigas (IFAE)
Mechanics and Cooling
10:50 - 11:10 Coffee
11:10 - 12:40 Engineering Sessions: Camera
PMTs: pulse width and gain
Mr. Tokonatsu Yamamoto (Konan University, Department of Physics)
Dragon Readout
Mr. Yusuke KONNO (Kyoto University)
Trigger ASICs
12:40 - 14:00 Lunch
14:00 - 15:30 Engineering Sessions: Camera
Camera Discussion
Study of effects of the hardware parameters on the telescope performance
Mr. Shu Masuda (Kyoto University)
Review of previous performance analysis
Mr. Ruben Lopez (IFAE)
15:30 - 16:00 Coffee
16:00 - 17:25 Engineering Sessions: Auxiliary
Telescope Slow Control Architecture and Interface with ACTL
Dr. Armand Fiasson (LAPP/IN2P3/CNRS)
Discussion about slow control
Thursday, 16 January 2014
09:00 - 09:20 Breakfast
09:20 - 10:50 Engineering Sessions: Auxiliary
Pointing correction strategy
Dr. Koji Noda (Max Planck Institute for Physics / Institute for Cosmic Ray Research)
Drive system
Dr. Armand Fiasson (LAPP/IN2P3/CNRS)
Camera Calibration
10:50 - 11:10 Coffee
11:10 - 12:40 Engineering Sessions: Optics
Introduction to Optics Status
Dr. Masaaki Hayashida (ICRR, Univ. of Tokyo)
Measurement of Mirror Surface
Hironori Baba (Ibaraki Univ.)
AMC developments
Ms. Asuka Nozato (Kinki university)
Interface Plate
Dr. Yoshitaka Hanabata (Institute for Cosmic Ray Research, University of Tokyo)
12:40 - 14:00 Lunch
14:00 - 15:30 Engineering Sessions: Management
Dr. Francesco Dazzi (MPI, Munich)
CTA / LST Reviews and deliverables
FMECA and Safety
15:30 - 16:00 Coffee
16:00 - 17:30 Engineering Sessions: Telescope Mechanics
Introduction to Structure Status
Dr. Thomas Schweizer (MPI Munich)
Dish and Lower Structure status
Friday, 17 January 2014
09:00 - 09:20 Breakfast
09:20 - 10:50 Engineering Sessions: Telescope Mechanics
LST full model and simulations a45
Camera Support Structure status
10:50 - 11:10 Coffee
11:10 - 12:30 Engineering Sessions: Telescope Mechanics
12:30 - 13:30 Lunch
13:30 - 21:30 Social Event: Research of Japanese Culture


M.Teshima ( ICRR )
H.Kubo ( Kyoto Univ. )
T.Totani ( Univ. of Tokyo )
M.Sugahara ( ICRR )


The Cherenkov Telescope Array ( CTA )
CTA http://www.cta-observatory.org
CTA-Japan http://www.cta-observatory.jp
ICRR http://www.icrr.u-tokyo.ac.jp