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Publication
Featured researches published by S. Bonnefoy.
arXiv: Instrumentation and Methods for Astrophysics | 2018
G. Giavitto; S. Bonnefoy; Terry Ashton; Michael Backes; A. Balzer; D. Berge; Francois Brun; Thomas Chaminade; E. Delagnes; G. Fontaine; Matthias Fuessling; B. Giebels; Jean-Francois Glicenstein; Tobias Gräber; J. A. Hinton; Albert Jahnke; S. Klepser; Marko Kossatz; Axel Kretzschmann; V. Lefranc; Holger Leich; Jean-Philippe Lenain; Hartmut Lüdecke; I. Lypova; Pascal Manigot; V. Marandon; E. Moulin; Mathieu de Naurois; P. Nayman; S. Ohm
The 14 years old cameras of the H.E.S.S. 12-m telescopes have been upgraded in 2015/2016, with the goals of reducing the system failure rate, reducing the dead time and improving the overall performance of the array. This conference contribution describes the various tests that were carried out on the cameras and their sub-components both in the lab and on site. It also gives an overview of the commissioning and calibration procedures adopted during and after the installation, including e.g. flat-fielding and trigger threshold scans. Finally, it reports in detail about the overall performance of the four new H.E.S.S-I cameras, using very recent data.
Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017) | 2017
S. Klepser; Terry Ashton; Michael Backes; A. Balzer; D. Berge; S. Bonnefoy; Francois Brun; Thomas Chaminade; E. Delagnes; G. Fontaine; Matthias Fuessling; G. Giavitto; Berrie Giebels; Jean-Francois Glicenstein; Tobias Gräber; J. A. Hinton; Albert Jahnke; Marko Kossatz; Axel Kretzschmann; V. Lefranc; Holger Leich; Jean-Philippe Lenain; Hartmut Lüdecke; I. Lypova; Pascal Manigot; V. Marandon; E. Moulin; Mathieu de Naurois; P. Nayman; S. Ohm
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.
