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https://www.um.edu.mt/library/oar/handle/123456789/28823
Title: | Final implementation, commissioning, and performance of embedded collimator beam position monitors in the Large Hadron Collider |
Authors: | Valentino, Gianluca Baud, Guillaume Bruce, Roderik Gasior, Marek Mereghetti, Alessio Mirarchi, Daniele Olexa, Jakub Redaelli, Stefano Salvachua, Belen Valloni, Alessandra Wenninger, Jorg |
Keywords: | Large Hadron Collider (France and Switzerland) Colliders (Nuclear physics) Collimators (Optical instrument) -- Calibration |
Issue Date: | 2017 |
Publisher: | American Physical Society |
Citation: | Valentino, G., Baud, G., Bruce, R., Gasior, M., Mereghetti, A., Mirarchi, D., ... & Wenninger, J. (2017). Final implementation, commissioning, and performance of embedded collimator beam position monitors in the Large Hadron Collider. Physical Review Accelerators and Beams, 20(8), 1-13. |
Abstract: | During Long Shutdown 1, 18 Large Hadron Collider (LHC) collimators were replaced with a new design, in which beam position monitor (BPM) pick-up buttons are embedded in the collimator jaws. The BPMs provide a direct measurement of the beam orbit at the collimators, and therefore can be used to align the collimators more quickly than using the standard technique which relies on feedback from beam losses. Online orbit measurements also allow for reducing operational margins in the collimation hierarchy placed specifically to cater for unknown orbit drifts, therefore decreasing the β and increasing the luminosity reach of the LHC. In this paper, the results from the commissioning of the embedded BPMs in the LHC are presented. The data acquisition and control software architectures are reviewed. A comparison with the standard alignment technique is provided, together with a fill-to-fill analysis of the measured orbit in different machine modes, which will also be used to determine suitable beam interlocks for a tighter collimation hierarchy. |
URI: | https://www.um.edu.mt/library/oar//handle/123456789/28823 |
Appears in Collections: | Scholarly Works - FacICTCCE |
Files in This Item:
File | Description | Size | Format | |
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Final_implementation_commissioning_and_performance_of_embedded_collimator_beam_position_monitors_in_the_large_hadron_collider.pdf | 3.47 MB | Adobe PDF | View/Open |
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