PoS - Proceedings of Science
Volume 282 - 38th International Conference on High Energy Physics (ICHEP2016) - Poster Session
ALFA detector before LHC Run 2
V. Vorobel* on behalf of the ATLAS collaboration
*corresponding author
Full text: pdf
Supplementary files
Pre-published on: February 06, 2017
Published on: April 19, 2017
The operation experience with ATLAS ALFA detectors in the LHC environment during the Run 1 period has shown significant beam-induced heating. Subsequent comprehensive studies revealed that heating effects could be disastrous in the case of the larger beam intensities foreseen for higher luminosities in the LHC Run 2. During the first LHC long shutdown (LS1) all ALFA detectors were removed from the LHC tunnel and their covers – Roman Pots – underwent a geometry upgrade to minimize the impedance losses. It is shown that this modification, together with an addition of a system improving the internal heat transfer and an air cooling system, has significantly shifted the temperatures of ALFA detectors away from the critical limits throughout the LHC Run 2. Also ALFA trigger system has been considerably upgraded to keep trigger signals safely inside the Run 2 ATLAS latency budget and to minimize dead time. The hardware changes of the trigger system are also described.
DOI: https://doi.org/10.22323/1.282.0863
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.