The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
@InProceedings{azzopardi:icalepcs2019-mopha010,
author = {G. Azzopardi and A. Muscat and S. Redaelli and B. Salvachua and G. Valentino},
title = {{Automatic Beam Loss Threshold Selection for LHC Collimator Alignment}},
booktitle = {Proc. ICALEPCS'19},
pages = {208--213},
paper = {MOPHA010},
language = {english},
keywords = {alignment, collimation, beam-losses, detector, software},
venue = {New York, NY, USA},
series = {International Conference on Accelerator and Large Experimental Physics Control Systems},
number = {17},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2020},
issn = {2226-0358},
isbn = {978-3-95450-209-7},
doi = {10.18429/JACoW-ICALEPCS2019-MOPHA010},
url = {https://jacow.org/icalepcs2019/papers/mopha010.pdf},
note = {https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA010},
abstract = {The collimation system used in the Large Hadron Collider at CERN is positioned around the beam with a hierarchy that protects sensitive equipment from unavoidable beam losses. The collimator settings are determined using a beam-based alignment technique, where collimator jaws are moved towards the beam until the beam losses exceed a predefined threshold. This threshold needs to be updated dynamically, corresponding to the changes in the beam losses. The current method for aligning collimators is semi-automated requiring a collimation expert to monitor the loss signals and continuously select and update the threshold accordingly. The human element in this procedure is a major bottleneck for speeding up the alignment. This paper therefore proposes a method to fully automate this threshold selection. A data set was formed from previous alignment campaigns and analyzed to define an algorithm that produced results consistent with the user selections. In over 90% of the cases the difference between the two was negligible and the algorithm presented in this study was used for collimator alignments throughout 2018.},
}