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Title: A tool based on the BPM-interpolated orbit for speeding up LHC collimator alignment
Authors: Valentino, Gianluca
Wolfgang Assmann, Ralph
Bruce, Roderik
Mueller, G. J.
Redaelli, Stefano
Salvachua, B.
Sammut, Nicholas
Keywords: Collimators (Optical instrument)
Large Hadron Collider (France and Switzerland)
Issue Date: 2012
Publisher: INSPIRE
Citation: Valentino, G., Wolfgang Assmann, R., Bruce, R., Mueller, G. J., Redaelli, S., Salvachua, B., & Sammut, N. (2012). A tool based on the BPM-interpolated orbit for speeding up LHC collimator alignment. 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB2012), Beijing. 162-165.
Abstract: Beam-based alignment of the LHC collimators is required in order to measure the orbit center and beam size at the collimator locations. During an alignment campaign in March 2012, 80 collimators were aligned at injection energy (450 GeV) using automatic alignment algorithms in 7.5 hours, the fastest setup time achieved since the start of LHC operation in 2008. Reducing the alignment time even further would allow for more frequent alignments, providing more time for physics operation. The proposed tool makes use of the BPM-interpolated orbit to obtain an estimation of the beam centers at the collimators, which can be exploited to quickly move the collimators jaws from the initial parking positions to tighter settings before beam-based alignment commences.
ISBN: 9783954501182
Appears in Collections:Scholarly Works - FacICTMN

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