John E. Ward - Light-Trap: A SiPM Upgrade for VHE Astronomy and Beyond
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Europe/Madrid
Seminar (IFAE)
Seminar
IFAE
Joern Lange
(IFAE Barcelona), Michael Leyton
(IFAE), Stefano Terzo
(IFAE)
Description
With the development of the Imaging Atmospheric Cherenkov Technique (IACT), Gamma-ray astronomy has become one of the most interesting and productive fields of astrophysics. Current IACT telescope arrays (MAGIC, H.E.S.S, VERITAS) use photomultiplier tubes (PMTs) to detect the optical/near-UV Cherenkov radiation emitted due to the interaction of gamma rays with the atmosphere.
For the next generation of IACT experiments, the possibility of replacing the PMTs with Silicon photomultipliers (SiPMs) is being studied. Among the main drawbacks of SiPMs are their limited active area (leading to an increase in the cost and complexity of the camera readout) and their sensitivity to unwanted wavelengths.
To overcome these shortcomings, a novel method to build a relatively low-cost pixel consisting of a SiPM attached to a PMMA disk doped with a wavelength shifter was proposed. This pixel collects light over a much larger area than a single standard SiPM and improves sensitivity to near-UV light while simultaneously rejecting background.
The concept, simulation results and laboratory measurements of a Light-Trap pixel prototype, as well as a brief description of field tests performed with a 7-pixel cluster that was recently installed in a MAGIC telescope camera will be presented.
Participants
Andrea Toldrà
Armando Quispe
Bruno Bourguille
Cardiel Laia
Chihaya Anzai
Daniel Guberman
Daniel Moreno
David Vázquez Furelos
Dirk Hornung
Emanuele Cavallaro
Eric Peregrina
Federico Sanchez
Imma Riu
Isaac Esparbé
John E Ward
jorge garcia
Juan Cortina
Lluïsa-Maria Mir
Machiel Kolstein
Manel Martinez
Manuel Prof. Manuel Delfino Reznicek
Marc Granado
Maria Pilar Casado
Martine Bosman
Oscar Martinez
Pere Masjuan
Rafel Escribano
Scott Griffiths
Sebastian Grinstein
Sidika Merve Colak
Stefano Terzo
Thomas Kosc
Thorsten Lux
Victor Cancer
13:00
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13:05
Introduction and General Announcements5m
Speakers:
Joern Lange
(IFAE Barcelona), DrMichael Leyton
(IFAE), DrStefano Terzo
(IFAE)