Adaptive Collimator Design for Future Particle Accelerators

Thomas Furness, Simon Fletcher, James Williamson, Alessandro Bertarelli, Federico Carra, Luca Gentini, Michele Pasquali, Stefano Redaelli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


The function of collimators in the Large Hadron Collider (LHC) is to control and safely dispose of the halo particles that are produced by unavoidable beam losses from the circulating beam. Even tiny proportions of the 7TeV beam have the stored energy to quench the superconducting magnets or damage parts of the accelerator if left unchecked. Particle absorbing Low-Z material makes up the active area of the collimator (jaws). Various beam impact scenarios can induce significant temperature gradients that cause deformation of the jaws. This can lead to a reduction in beam cleaning efficiency, which can have a detrimental effect
on beam dynamics. This has led to research into a new Adaptive Collimation System (ACS). The ACS is a re-design of a current collimator already in use at CERN, for use in the HL-LHC. The ACS will incorporate a novel fibreoptic-based measurement system and piezoceramic actuators mounted within the body of the collimator to maintain jaw straightness below the 100µm specification. These two systems working in tandem can monitor, and correct for, the jaw structural deformation for all impact events. This paper details the concept and technical solutions of the ACS as well as preliminary validation calculations.
Original languageEnglish
Title of host publicationProceedings of the 7th International Beam Instrumentation Conference, IBIC 2018
EditorsVolker RW Schaa, Christine Petit-Jean-Genaz, Jan Chrin, Johan Olander, Zhichu Chen
PublisherJoint Accelerator Conferences Website (JACoW)
Number of pages5
ISBN (Electronic)9783954502011
Publication statusPublished - 29 Jan 2019
Event7th International Beam Instrumentation Conference - Shanghai Institute of Applied Physics, Shanghai, China
Duration: 9 Sep 201813 Sep 2018
Conference number: 7 (Link to Conference Website)


Conference7th International Beam Instrumentation Conference
Abbreviated titleIBIC2018
Internet address


Dive into the research topics of 'Adaptive Collimator Design for Future Particle Accelerators'. Together they form a unique fingerprint.

Cite this