An Analog Level 1 Trigger Prototype for CTA

The Cherenkov Telescope Array (CTA) project aims to build the largest ground-based gamma ray observatory based on an array of Imaging Atmospheric Cherenkov Telescopes. The CTA will implement a multi-level trigger system to distinguish between the gamma ray-like induced showers and the background images induced by night sky background light. The trigger system is based on looking for coincident detections among pixels (level 0 trigger), clusters of pixels (level 1) or telescopes (level 2). In this article one prototype of a Level 1 trigger system is presented, capable of working with different Level 0 strategies and different trigger region sizes. At the same time it complies with all the requirements specified by the CTA project, specially the most critical ones as regards noise, dynamic range, latency and power consumption. All these features make the presented system very suitable to be used by the CTA telescopes.

[1]  M. Snure,et al.  The Very Energetic Radiation Imaging Telescope Array System , 2002 .

[2]  S. Funk,et al.  The trigger system of the H.E.S.S. telescope array , 2004 .

[3]  N. Turini,et al.  The trigger system of the MAGIC telescope , 2004, IEEE Symposium Conference Record Nuclear Science 2004..

[4]  for the VERITAS Collaboration,et al.  The VERITAS Trigger System , 2007 .

[5]  T. Schweizer,et al.  A New Sum Trigger to Provide a Lower Energy Threshold for the MAGIC Telescope , 2009, IEEE Transactions on Nuclear Science.

[6]  The Cta Consortium.  Design Concepts for the Cherenkov Telescope Array , 2010, 1008.3703.

[7]  Hidetoshi Kubo,et al.  Development of the Readout System for CTA Using the DRS4 Waveform Digitizing Chip , 2011 .

[8]  M. Garczarczyk.  The major atmospheric gamma-ray imaging Cherenkov telescope , 2011 .

[9]  J. Mcenery,et al.  Fermi Gamma-Ray Space Telescope , 2012 .

[10]  José Ignacio Alonso Montes,et al.  Divisores Wilkinson con elementos concentrados para procesado de pulsos , 2011 .

[11]  A Tunable Delay Line for Fast Analog Pulses as Key Element of a New Sum-Trigger for Cherenkov Telescopes , 2012, IEEE Transactions on Nuclear Science.

[12]  M.,et al.  The NECTAr project : a New Electronics design for Cherenkov Telescope Arrays , 2012 .

[13]  伸二 三代木.  宇宙線・宇宙物理領域,素粒子論領域「超高エネルギーガンマ線天文学とCherenkov Telescope Array(CTA)計画」(第70回年次大会(2015年)シンポジウムの報告,学会報告) , 2015 .

[14]  29. Detectors for Non-accelerator Physics 1 29.2. High-energy Cosmic-ray Hadron and Gamma-ray Detectors . . . . . . . . 2 29. Particle Detectors for Non-accelerator Physics , 2022 .