Novel silicon photomultipliers suitable for dual-mirror small-sized telescopes of the Cherenkov telescope array

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00538202" target="_blank" >RIV/68378271:_____/18:00538202 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.nima.2018.08.035" target="_blank" >https://doi.org/10.1016/j.nima.2018.08.035</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nima.2018.08.035" target="_blank" >10.1016/j.nima.2018.08.035</a>

Result language

angličtina

Original language name

Novel silicon photomultipliers suitable for dual-mirror small-sized telescopes of the Cherenkov telescope array

Original language description

Many of the characteristics of Silicon Photomultipliers (SiPMs), such as high Photon Detection Efficiency (PDE), are well matched to the requirements of the cameras of the Small-Sized Telescopes (SSTs) proposed for the Cherenkov Telescope Array. In fact, compared to a single mirror, the double mirror Schwarzschild–Couder configuration provides a much better Point Spread Function over a large field of view. It allows better correction of aberrations at large off-axis angles and facilitates the construction of compact telescopes. Moreover, the small plate scale of the dual-mirror SSTs allows the use of SiPM detectors despite their small pixel sizes. These sensors have two further advantages compared to the Photo Multipliers Tubes: the low cost and the possibility to observe in very high Night Sky Background (NSB) light level without any damage. However, one area in which SiPM performance has required improvement is Optical Cross-Talk (OCT), where multiple avalanches are induced by a single impinging photon. OCT, coupled with the typical NSB rate of 25 MCnts/s per pixel during Cherenkov observations, can place severe constraints on the triggering capability of the cameras. This paper describes the performance of novel Low Voltage Reverse (LVR) 2nd and 3rd generation Multi-Pixel Photon Counters manufactured by Hamamatsu Photonics. These are designed to have both enhanced PDE and reduced OCT. Two 7 × 7 mm2 S14520 LVR2 MPPCs with 75μm micro-cells are tested and compared with detectors of the same pixel size with 50μm micro-cells. A comparative analysis of a 3×3 mm2 S14520 LVR2 device and an S14520 LVR3 device is also carried out, demonstrating that the LVR3 gives better photon detection in the 240 – 380 nm wave-length range. Finally, the effect of an infrared filter on the OCT is analysed.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10303 - Particles and field physics

Project

—

Continuities

—

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nuclear Instruments & Methods in Physics Research Section A

ISSN

0168-9002

e-ISSN

—

Volume of the periodical

908

Issue of the periodical within the volume

Nov

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

117-127

UT code for WoS article

000446864600015

EID of the result in the Scopus database

2-s2.0-85052470017