SiPM behaviour under continuous light

Nagai, A.; Alispach, Cyril Martin; Volpe, D. della; Heller, M.; Montaruli, T.; Njoh, S.; Troyano-Pujadas, I.; Renier, Y.

doi:10.1088/1748-0221/14/12/p12016

Cited by 9 publications

(10 citation statements)

References 9 publications

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“…415 nm for Cherenkov and 651 nm for NSB. From [26], we find out that at 600 MHz (1.5 GHz) the PDE decreased by 15% (30%) for both wavelengths. Therefore, cam, N SB (600 MHz) = 0.053 and cam, N SB (1.5 GHz) = 0.043.…”

Section: Estimate Of the Physics Reach Of The Mini-telescopementioning

confidence: 88%

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A mini-imaging air Cherenkov Telescope

et al. 2020

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A: In this paper we describe the different software and hardware elements of a mini-telescope for the detection of cosmic rays and gamma-rays using the Cherenkov light emitted by their induced particle showers in the atmosphere. We estimate the physics reach of the standalone mini-telescope and present some results of the measurements done at the Sauverny Observatory of the University of Geneva and at the Saint-Luc Observatory, which demonstrate the ability of the telescope to observe cosmic rays with energy above about 100 TeV. Such a mini-telescope can constitute a cost-effective out-trigger array that can surround other gamma-ray telescopes or extended air showers detector arrays. Its development was born out of the desire to illustrate to students and amateurs the cosmic ray and gamma-ray detection from ground, as an example of what is done in experiments using larger telescopes. As a matter of fact, a mini-telescope can be used in outreach night events. While outreach is becoming more and more important in the scientific community to raise interest in the general public, the realisation of the mini-telescope is also a powerful way to train students on instrumentation such as photosensors, their associated electronics, acquisition software and data taking. In particular, this mini-telescope uses silicon photomultipliers (SiPM) and the dedicated ASIC, CITIROC. K: gamma-ray, cosmic-ray, Cherenkov detector, SiPM, ASIC 1Corresponding author. The mini-telescopeGiven the limited funding, the telescope was built by re-using, as much as possible, available components used to build the SST-1M and in other experiments. The mini-telescope is composed by a metal box containing the camera and holding an UV Fresnel lens inherited from the Jem-EUSO project [17]. The camera uses some of the spare modules of the SST-1M camera [15] and the readout system was borrowed and adapted from the BabyMind Project [18]. We describe all components in detail below.

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Section: Estimate Of the Physics Reach Of The Mini-telescopementioning

confidence: 88%

“…This resistor causes a voltage drop that reduces the bias voltage of the sensor and hence its PDE, gain and optical cross talk. More details about this effect can be found in [26]. So signals with the same amount of photons appear as weaker because of the NSB.…”

Section: Ac-dc Scan For Various Emulated Nsb Levelsmentioning

confidence: 95%

A mini-imaging air Cherenkov Telescope

et al. 2020

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“…The moonlight induces a continuous photo-current in the SiPM, and leads to an additional voltage drop on the bias resistor. Accordingly, the bias voltage, and then the gain, P DE, DCR, the crosstalk probability, the afterpulse probability of the SiPM, varies with the intensity of NSB light [58]. The continuous photo-current can also generate additional heat on the SiPM.…”

Section: Performancementioning

confidence: 99%

Construction and on-site performance of the LHAASO WFCTA camera

Aharonian¹,

An²,

Axikegu³

et al. 2021

Eur. Phys. J. C

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The focal plane camera is the core component of the Wide Field-of-view Cherenkov/fluorescence Telescope Array (WFCTA) of the Large High-Altitude Air Shower Observatory (LHAASO). Because of the capability of working under moonlight without aging, silicon photomultipliers (SiPM) have been proven to be not only an alternative but also an improvement to conventional photomultiplier tubes (PMT) in this application. Eighteen SiPM-based cameras with square light funnels have been built for WFCTA. The telescopes have collected more than 100 million cosmic ray events and preliminary results indicate that these cameras are capable of working under moonlight. The characteristics of the light funnels and SiPMs pose challenges (e.g. dynamic range, dark count rate, assembly techniques). In this paper, we present the design features, manufacturing techniques and performances of these cameras. Finally, the test facilities, the test methods and results of SiPMs in the cameras are reported here.

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“…The second telescope SST-1M-2, however, differs from SST-1M-1 in several aspects (e.g. different transmissivity of the camera entrance window [17], or different gain drop [18]), and we thus repeated the study described in [15], this time including also detailed modeling of the optical Point Spread Function (PSF) for both telescopes.…”

Section: Monte Carlo Simulations Of Sst-1mmentioning

confidence: 99%

Monte Carlo study of single SST-1M prototype for Cherenkov Telescope Array

Jurýšek¹,

Samarai²,

Alispach³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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The Single-Mirror Small-Sized Telescope, or SST-1M, was originally developed as a prototype of a small-sized telescope for CTA, designed to form an array for observations of gamma-ray-induced atmospheric showers for energies above 3 TeV. A pair of SST-1M telescopes is currently being commissioned at the Ondřejov Observatory in the Czech Republic, and the telescope capabilities for mono and stereo observations are being tested in better astronomical conditions. The final location for the telescopes will be decided based on these tests. In this contribution, we present a data analysis pipeline called sst1mpipe, and the performance of the telescopes when working independently and in a stereo regime.

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SiPM behaviour under continuous light

Cited by 9 publications

References 9 publications

A mini-imaging air Cherenkov Telescope

A mini-imaging air Cherenkov Telescope

Construction and on-site performance of the LHAASO WFCTA camera

Monte Carlo study of single SST-1M prototype for Cherenkov Telescope Array

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