Measurement of performance of the NectarCAM photodetectors

Abstract

NectarCAM is a camera for the medium-sized telescopes of the Cherenkov Telescope Array (CTA), which covers the energy range of 100 GeV to 30 TeV. The camera is equipped with 265 focal plane modules (FPMs). Each FPM comprises 7 pixels, each consisting of a photo-multiplier tube, a preamplifier, an independently controlled power supply, and a common control system. We developed a dedicated test bench to validate and qualify the industrial FPM production and to measure the performance of each FPM in a dark room before its integration in the camera. We report the measured performance of 61 FPM prototypes obtained with our experimental setup. We demonstrate that the gains of the photo multiplier tubes are stable and that pulse widths, transit time spreads, afterpulse rates and charge resolutions are within the specifications for NectarCAM.

References in corpus (3)

• Performance Verification of the FlashCam Prototype Camera for the Cherenkov Telescope Array
• Transit Time and Charge Correlations of Single Photoelectron Events in R7081 PMTs
• Design and characterization of a single photoelectron calibration system for the NectarCAM camera of the medium-sized telescopes of the Cherenkov Telescope Array

Cited by in corpus (5)

• Development and Quality Control of PMT Modules for the Large-Sized Telescopes of the Cherenkov Telescope Array Observatory
• The NectarCAM Timing System
• The Camera and Readout for the Trinity Demonstrator and the EUSO-SPB2 Cherenkov Telescope
• Characterization and performance of an upgraded front-end-board for NectarCAM
• A single photo-electron calibration system for theNectarCAM camera of the Cherenkov Telescope ArrayMedium-Sized Telescopes