Characterization and performance of the ASIC (CITIROC) front-end of the ASTRI camera

Impiombato, D.; Giarrusso, S.; Mineo, T.; Catalano, O.; Gargano, C.; Rosa, G. La; Russo, F.; Sottile, G.; Billotta, S.; Bonanno, G.; Garozzo, S.; Grillo, A.; Marano, D.; Romeo, G.

doi:10.1016/j.nima.2015.05.028

Cited by 68 publications

(23 citation statements)

References 15 publications

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“…The CITIROC [4,5], designed by WEEROC1, is a 32-channel fully analogue front-end ASIC dedicated to the SiPM sensors read-out. It is designed with a 0.35µm SiGe technology from AustriaMicroSystems.…”

Section: The Citiroc Chipmentioning

confidence: 99%

Use of the Peak-Detector mode for gain calibration of SiPM sensors with ASIC CITIROC read-out

Impiombato¹,

Segreto²,

Catalano³

et al. 2020

J. Inst.

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A: The Cherenkov Imaging Telescope Integrated Read Out Chip (CITIROC) is a 32-channel fully analogue front-end ASIC dedicated to the read-out of silicon photo-multiplier (SiPM) sensors that can be used in a variety of experiments with different applications: nuclear physics, medical imaging, astrophysics, etc. It has been adopted as front-end for the focal plane detectors of the ASTRI-Horn Cherenkov telescope [1, 2] and, in this context, it was modified implementing the peak detector reading mode to satisfy the instrument requirements.For each channel, two parallel AC coupled voltage preamplifiers, one for the high gain and one for the low gain, ensure the read-out of the charge from 160 fC to 320 pC (i.e. from 1 to 2000 photo-electrons with SiPM gain = 10 6 , with a photo-electron to noise ratio of 10). The signal in each of the two preamplifier chains is shaped and the maximum value is captured by activating the peak detector for an adjustable time interval.In this work, we illustrate the peak detector operation mode and, in particular, how this can be used to calibrate the SiPM gain without the need of external light sources. To demonstrate the validity of the method, we also present and discuss some laboratory measurements. K: Front-end electronics for detector read-out, Photon detectors for UV-visible and IR photons (solid-state)-Solid state detectors 1Corresponding author. 2Corresponding author. 3Corresponding author.

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Section: The Citiroc Chipmentioning

confidence: 99%

Use of the Peak-Detector mode for gain calibration of SiPM sensors with ASIC CITIROC read-out

Impiombato¹,

Segreto²,

Catalano³

et al. 2020

J. Inst.

Self Cite

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Section: Astri For the Cherenkov Telescope Arraymentioning

confidence: 99%

“…Differently from other CTA telescopes that use the standard sampling technique, the ASTRI camera electronics is based on a custom peak-detector operation mode to acquire the SiPM pulses [9,10]. The Cherenkov Imaging Telescope Integrated Read Out Chip (CITIROC), with its signal shaper and peak detector customized for ASTRI, represents an innovative technical solution and provides high efficiency pixel by pixel trigger capability and very fast camera pixel read out [11].The ASTRI camera trigger is a topological one, activated when a given number of contiguous pixels within a PDM presents a signal above a given photo-electron threshold. Both the number of contiguous pixels required for a trigger and the signal threshold can be manually set or automatically adjusted, depending on the level of night sky background.…”

mentioning

confidence: 99%

ASTRI for the Cherenkov Telescope Array

Maccarone¹

2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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The Cherenkov Telescope Array (CTA) will be the largest ground-based observatory operating in the very-high-energy gamma-ray (20 GeV -300 TeV) range. It will be based on more than one hundred telescopes, located at two sites (in the northern and southern hemispheres). The energy coverage, in the southern CTA array, will extend up to hundreds of TeV thanks to 70 small size telescopes (SST), with their primary mirrors of about 4 meters in diameter and large field of view of the order of 9 degrees. It is proposed that one of the first sets of precursors for the CTA SSTs array will be represented by (at least) nine ASTRI telescopes. The prototype of such telescopes, named ASTRI SST-2M, is installed in Italy. It is currently completing the overall commissioning before entering the science verification phase that will performed observing bright TeV sources as Crab Nebula, Mrk421 and Mrk 501. This science verification phase will cross-check the prototype performance with the predictions of detailed Monte Carlo simulations.ASTRI telescopes are characterized by a dual-mirror optical design based on the SchwarzschildCouder (SC) configuration. The focal-plane camera is curved in order to fit the ideal prescription for the SC design and the sensors are small size silicon photomultipliers read-out by a fast front-end electronics. The telescope prototype installed in Italy, has been developed by the Italian National Institute for Astrophysics, INAF, following an end-to-end approach that comprises all aspects from the design, construction and implementation of the entire hardware and software system to the final scientific products. In this respect, the internal and external calibration systems, control/acquisition hardware and software, data reduction and analysis software, and data archiving system are being realized in addition to the telescope structure and camera. All parts of the system have been designed to comply with the CTA requirements. A collaborative effort, addressed to the implementation of the first ASTRI telescopes for the CTA southern site, is now on-going led by INAF with the Universidade de Sao Paulo (Brazil), the North-West University (South Africa) and the Italian National Institute for Nuclear Physics, INFN. In this contribution we will describe the main features of the ASTRI telescopes, the latest news from their prototype, its performance and the expectations of the first set of ASTRI telescopes proposed for CTA. [1,2] is the next generation ground-based observatory for gamma-ray astronomy at very high energies. With more than one hundred Cherenkov telescopes located in two sites, one for each hemisphere, assuring full sky coverage, CTA will detect very high energy radiation with unprecedented accuracy and sensitivity better than current Image Atmospheric Cherenkov Technique (IACT) experiments. Three different classes of telescopes (LST, MST, SST, that is large, medium and small, so defined with respect to their collecting mirror size) will have different field-of-views and are designed to access diff...

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“…The ASTRI Project in the Framework of the Cherenkov Telescope Array Stefano Vercellone adopts the CITIROC [10], a customized version of the EASIROC [11] ASIC signal-shaper manufactured by Omega 2 . Fig.…”

Section: Pos(frapws2016)065mentioning

confidence: 99%

The ASTRI Project in the Framework of the Cherenkov Telescope Array

Vercellone¹

2017

Proceedings of Frontier Research in Astrophysics – II — PoS(FRAPWS2016)

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The Cherenkov Telescope Array (CTA) will be the next generation facility to investigate the very high-energy gamma-ray emission from a large variety of celestial sources. The full array, installed at two sites, one in the northern and one in the southern hemisphere, will start to operate at the beginning of the next decade. In the meantime, a few telescope prototypes have been developed and some pre-production CTA telescopes have been planned. Within this framework, the Italian National Institute for Astrophysics (INAF) is leading the ASTRI project, whose aim is twofold. The ASTRI Collaboration has successfully developed and installed in Sicily a prototype of the CTA small-sized telescopes (SST), according to an innovative dual-mirror (2M) optical solution and equipped with a silicon-based photo-detector Cherenkov camera. Moreover, INAF is leading the development of one of the mini-arrays of pre-production CTA telescopes composed of at least nine dual-mirror telescopes and proposed to be installed at the CTA southern site in 2018. The ASTRI mini-array of SST pre-production CTA telescopes will be able to both verify some of the adopted innovative solutions, such as the wide field of view, and to investigate sources emitting at energies from a few TeV up to hundreds of TeV. We discuss the preliminary results obtained by the ASTRI SST-2M prototype during its ongoing commissioning phase, the expected Monte Carlo performance of the ASTRI mini-array of SST pre-production CTA telescopes, and provide an overview of the scientific topics that can be addressed both, as a stand-alone mini-array and in synergy with other pre-production CTA telescopes.

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Characterization and performance of the ASIC (CITIROC) front-end of the ASTRI camera

Cited by 68 publications

References 15 publications

Use of the Peak-Detector mode for gain calibration of SiPM sensors with ASIC CITIROC read-out

Use of the Peak-Detector mode for gain calibration of SiPM sensors with ASIC CITIROC read-out

ASTRI for the Cherenkov Telescope Array

The ASTRI Project in the Framework of the Cherenkov Telescope Array

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