The NectarCAM Timing System
arXiv:2301.13828 · doi:10.1016/j.nima.2023.168398
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 neighbouring 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.
8 pages, 13 figures
References in corpus (5)
- Measurement of performance of the NectarCAM photodetectors
- Reconfigurable ASIC for a Low Level Trigger System in Cherenkov Telescope Cameras
- Design and characterization of a single photoelectron calibration system for the NectarCAM camera of the medium-sized telescopes of the Cherenkov Telescope Array
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- Improved performances of the NectarCAM, a Medium-Sized Telescope Camera for the Cherenkov Telescope Array