Hardware and software architecture of the upgraded H.E.S.S. cameras
S. Klepser, T. Ashton, M. Backes, A. Balzer, D. Berge, S. Bonnefoy, F., Brun, T. Chaminade, E. Delagnes, G. Fontaine, M. F\"u{\ss}ling, G. Giavitto,, B. Giebels, J.F. Glicenstein, T. Gr\"aber, J.A. Hinton, A. Jahnke, M., Kossatz, A. Kretzschmann, V. Lefranc, H. Leich
TL;DR
This paper describes the comprehensive upgrade of the H.E.S.S. Cherenkov telescopes' cameras in 2015/16, including new electronics, ventilation, and software, enhancing performance and maintainability.
Contribution
It introduces a modern, modular control and readout software architecture and details the hardware upgrades using NECTAr chips and Ethernet technology.
Findings
Enhanced camera performance and reliability
Improved software flexibility and modularity
Successful integration of new hardware components
Abstract
In 2015/16, the photomultiplier cameras of the H.E.S.S. Cherenkov telescopes CT1-4 have undergone a major upgrade. The entire electronics has been replaced, using NECTAr chips for the front-end readout. A new ventilation system has been installed and several auxiliary components have been replaced. Besides this, the internal control and readout software was rewritten from scratch in a modern and modular way. Ethernet technology was used wherever possible to ensure both flexibility, stability and high bandwidth. An overview of the installed components will be given.
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