The NectarCAM timing system

Bradascio, F.; Brun, F.; Champion, C.; Hoffmann, D.; Jean, P.; Punch, M.; Biteau, J.; Perez, A.; Barrio, J. A.; Louis, F.; Sizun, P.; Tejedor, L. A.; Vallage, B.; Glicenstein, J.-F.; Sulanke, K.-H.; Rueda, H.; Lenain, J. P.

doi:10.1016/j.nima.2023.168398

Journal Article

PUBDB-2023-04000

The NectarCAM timing system

Bradascio, F. (Corresponding author)DESY* ; Rueda, H. ; Barrio, J. A. ; Biteau, J. ; Brun, F. ; Champion, C. ; Glicenstein, J.-F. ; Hoffmann, D. ; Jean, P. ; Lenain, J. P. ; Louis, F. ; Perez, A. ; Punch, M. ; Sizun, P. ; Sulanke, K.-H.DESY* ; Tejedor, L. A. ; Vallage, B.

2023
North-Holland Publ. Co. Amsterdam

Nuclear instruments & methods in physics research / A 1054, 168398 (2023) [10.1016/j.nima.2023.168398]

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Please use a persistent id in citations: doi:10.1016/j.nima.2023.168398 doi:10.3204/PUBDB-2023-04000

Report No.: arXiv:2301.13828

Abstract: NectarCAM is a Cherenkov camera which is going to equip the Medium-Sized Telescopes (MST) of the northern site of the Cherenkov Telescope Array Observatory (CTAO). NectarCAM is equipped with 265 modules, each consisting of 7 photo-multiplier tubes (PMTs), a Front-End Board and a local camera trigger system used for data acquisition. This paper addresses the timing performance of NectarCAM which are crucial to reduce the noise in shower images and improve image cleaning as well as to discriminate between gamma-ray photons and cosmic-ray background and finally to allow coincidence identification with neighboring telescopes for stereoscopic operations. Verification tests of the system have been performed in a dark room using various light sources to illuminate the first NectarCAM unit. The resulting timing precision and accuracy of the trigger arrival relative to a laser source, of individual and multiple pixel signals have been studied and are shown to comply to CTAO requirements.

Keyword(s): trigger ; observatory ; laser ; background ; photomultiplier ; showers ; tube ; photon ; data acquisition ; site ; Cherenkov Telescope Array ; noise ; gamma ray ; performance ; Cherenkov ; cosmic radiation ; pixel ; NectarCAM ; Gamma ray ; Cherenkov ; CTAO ; Timing resolution ; PMT transit time ; Trigger

Classification:

ddc:530

Note: 8 pages, 13 figures

Contributing Institute(s):

CTAI (CTAI)

Research Program(s):

613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)

Experiment(s):

Cherenkov Telescope Array

Appears in the scientific report 2023

Database coverage:
Medline

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Creative Commons Attribution-NonCommercial-NoDerivs CC BY-NC-ND 4.0

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