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DC Field | Value | Language |
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dc.contributor.author | Azzopardi, Gabriella | - |
dc.contributor.author | Salvachua, Belen | - |
dc.contributor.author | Valentino, Gianluca | - |
dc.contributor.author | Redaelli, Stefano | - |
dc.contributor.author | Muscat, Adrian | - |
dc.date.accessioned | 2020-07-17T07:30:49Z | - |
dc.date.available | 2020-07-17T07:30:49Z | - |
dc.date.issued | 2019-09 | - |
dc.identifier.citation | Azzopardi, G., Salvachua, B., Valentino, G., Redaelli, S., & Muscat, A. (2019). Operational results on the fully automatic LHC collimator alignment. Physical Review Accelerators and Beams, 22(9), 093001. | en_GB |
dc.identifier.uri | https://www.um.edu.mt/library/oar/handle/123456789/58862 | - |
dc.description.abstract | The Large Hadron Collider has a complex collimation system installed to protect its sensitive equipment from normal and abnormal beam losses. The collimators are set around the beam following a multistage transverse setting hierarchy. The insertion position of each collimator is established using beam-based alignment techniques to determine the local beam position and rms beam size at each collimator. During previous years, collimator alignments were performed semiautomatically, with collimation experts present to oversee and control the alignment. During run II, a new fully automatic alignment tool was developed and used for collimator alignments throughout 2018. This paper discusses the improvements on the alignment software to automate it using machine learning, whilst focusing on the operational results obtained when testing the new software in the LHC. The alignment tests were conducted with both proton and ion beams, and angular alignments were performed with proton beams. This upgraded software successfully decreased the alignment time by a factor of 3 and made the results more reproducible, which is particularly important when performing angular alignments. | en_GB |
dc.language.iso | en | en_GB |
dc.publisher | American Physical Society | en_GB |
dc.rights | info:eu-repo/semantics/openAccess | en_GB |
dc.subject | Large Hadron Collider (France and Switzerland) | en_GB |
dc.subject | Collimators (Optical instrument) | en_GB |
dc.title | Operational results on the fully automatic LHC collimator alignment | en_GB |
dc.type | article | en_GB |
dc.rights.holder | The copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder. | en_GB |
dc.description.reviewed | peer-reviewed | en_GB |
dc.publication.title | Physical Review Accelerators and Beams | en_GB |
Appears in Collections: | Scholarly Works - FacICTCCE |
Files in This Item:
File | Description | Size | Format | |
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PhysRevAccelBeams.22.093001.pdf | 9.51 MB | Adobe PDF | View/Open |
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