Calibration and performance of the readout system based on switched capacitor arrays for the Large-Sized Telescope of the Cherenkov Telescope Array

Seiya Nozaki; Kyosuke Awai; Aya Bamba; Juan Abel Barrio; Maria Isabel Bernardos; Oscar Blanch; Joan Boix; Franca Cassol; Yuki Choushi; Carlos Delgado; Carlos Diaz; Nadia Fouque; Lluis Freixas; Pawel Gliwny; Shuichi Gunji; Daniela Hadasch; Dirk Hoffmann; Julien Houles; Yusuke Inome; Yuki Iwamura; Lea Jouvin; Hideaki Katagiri; Kiomei Kawamura; Daniel Kerszberg; Yusuke Konno; Hidetoshi Kubo; Junko Kushida; Yukiho Kobayashi; Ruben López-Coto; Gustavo Martinez; Shu Masuda; Daniel Mazin; Abelardo Moralejo; Elena Moretti; Tsutomu Nagayoshi; Takeshi Nakamori; Kyoshi Nishijima; Yuto Nogami; Leyre Nogués; Hideyuki Ohoka; Tomohiko Oka; Nao Okazaki; Akira Okumura; Reiko Orito; Jean-Luc Panazol; Riccardo Paoletti; Cristobal Pio; Miguel Polo; Julie Prast; Takayuki Saito; Shunsuke Sakurai; Julian Sitarek; Yuji Sunada; Megumi Suzuki; Mitsunari Takahashi; Kenji Tamura; Manobu Tanaka; Luis Angel Tejedor; Yukikatsu Terada; Masahiro Teshima; Yusuke Tsukamoto; Tokonatsu Yamamoto

doi:10.1117/12.2560018

13 December 2020 Calibration and performance of the readout system based on switched capacitor arrays for the Large-Sized Telescope of the Cherenkov Telescope Array

Seiya Nozaki, Kyosuke Awai, Aya Bamba, Juan Abel Barrio, Maria Isabel Bernardos, Oscar Blanch, Joan Boix, Franca Cassol, Yuki Choushi, Carlos Delgado, Carlos Diaz, Nadia Fouque, Lluis Freixas, Pawel Gliwny, Shuichi Gunji, Daniela Hadasch, Dirk Hoffmann, Julien Houles, Yusuke Inome, Yuki Iwamura, Lea Jouvin, Hideaki Katagiri, Kiomei Kawamura, Daniel Kerszberg, Yusuke Konno, Hidetoshi Kubo, Junko Kushida, Yukiho Kobayashi, Ruben López-Coto, Gustavo Martinez, Shu Masuda, Daniel Mazin, Abelardo Moralejo, Elena Moretti, Tsutomu Nagayoshi, Takeshi Nakamori, Kyoshi Nishijima, Yuto Nogami, Leyre Nogués, Hideyuki Ohoka, Tomohiko Oka, Nao Okazaki, Akira Okumura, Reiko Orito, Jean-Luc Panazol, Riccardo Paoletti, Cristobal Pio, Miguel Polo, Julie Prast, Takayuki Saito, Shunsuke Sakurai, Julian Sitarek, Yuji Sunada, Megumi Suzuki, Mitsunari Takahashi, Kenji Tamura, Manobu Tanaka, Luis Angel Tejedor, Yukikatsu Terada, Masahiro Teshima, Yusuke Tsukamoto, Tokonatsu Yamamoto

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114470H (2020) https://doi.org/10.1117/12.2560018
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

The Cherenkov Telescope Array1 (CTA) is the next-generation ground-based observatory for very-high-energy gamma rays. The CTA consists of three types of telescopes with different mirror areas to cover a wide energy range (20 GeV–300 TeV) with an order of magnitude higher sensitivity than the predecessors. Among those telescopes, the Large-Sized Telescope (LST) is designed to detect low-energy gamma rays between 20 GeV and a few TeV with a 23 m diameter mirror. To make the most of such a large light collection area (about 400 m2), the focal plane camera must detect as much reflected Cherenkov light as possible. We have developed each camera component to meet the CTA performance requirements for more than ten years and performed quality-control tests before installing the camera to the telescope.2, 3 The first LST (LST-1) was inaugurated in October 2018 in La Palma, Spain (Figure 1).4 After the inauguration, various calibration tests were performed to adjust hardware parameters and verify the camera performance. In parallel, we have been developing the analysis software to extract physical parameters from low-level data, taking into account some intrinsic characteristics of the switched capacitor arrays, Domino Ring Sampler version 4 (DRS4), used for sampling the waveform of a Cherenkov signal. In this contribution, we describe the hard- ware design of the LST camera in Section 2, a procedure for low-level calibration in Section 3, and the readout e of the LST camera after the hardware calibration with a dedicated analysis chain in Section 4.

Conference Presentation

Citation Download Citation

Seiya Nozaki, Kyosuke Awai, Aya Bamba, Juan Abel Barrio, Maria Isabel Bernardos, Oscar Blanch, Joan Boix, Franca Cassol, Yuki Choushi, Carlos Delgado, Carlos Diaz, Nadia Fouque, Lluis Freixas, Pawel Gliwny, Shuichi Gunji, Daniela Hadasch, Dirk Hoffmann, Julien Houles, Yusuke Inome, Yuki Iwamura, Lea Jouvin, Hideaki Katagiri, Kiomei Kawamura, Daniel Kerszberg, Yusuke Konno, Hidetoshi Kubo, Junko Kushida, Yukiho Kobayashi, Ruben López-Coto, Gustavo Martinez, Shu Masuda, Daniel Mazin, Abelardo Moralejo, Elena Moretti, Tsutomu Nagayoshi, Takeshi Nakamori, Kyoshi Nishijima, Yuto Nogami, Leyre Nogués, Hideyuki Ohoka, Tomohiko Oka, Nao Okazaki, Akira Okumura, Reiko Orito, Jean-Luc Panazol, Riccardo Paoletti, Cristobal Pio, Miguel Polo, Julie Prast, Takayuki Saito, Shunsuke Sakurai, Julian Sitarek, Yuji Sunada, Megumi Suzuki, Mitsunari Takahashi, Kenji Tamura, Manobu Tanaka, Luis Angel Tejedor, Yukikatsu Terada, Masahiro Teshima, Yusuke Tsukamoto, and Tokonatsu Yamamoto "Calibration and performance of the readout system based on switched capacitor arrays for the Large-Sized Telescope of the Cherenkov Telescope Array", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114470H (13 December 2020); https://doi.org/10.1117/12.2560018

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available