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

1 Citation (Scopus)

Abstract

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)
Pages240-244
Number of pages5
Volume187
ISBN (Electronic)9783954502011
DOIs
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
http://ibic2018.vrws.de/ (Link to Conference Website)

Conference

Conference7th International Beam Instrumentation Conference
Abbreviated titleIBIC2018
CountryChina
CityShanghai
Period9/09/1813/09/18
Internet address

Fingerprint

particle accelerators
collimators
collimation
superconducting magnets
cleaning
specifications
halos
temperature gradients
proportion
accelerators
actuators
damage
causes

Cite this

Furness, T., Fletcher, S., Williamson, J., Bertarelli, A., Carra, F., Gentini, L., ... Redaelli, S. (2019). Adaptive Collimator Design for Future Particle Accelerators. In V. RW. Schaa, C. Petit-Jean-Genaz, J. Chrin, J. Olander, & Z. Chen (Eds.), Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018 (Vol. 187, pp. 240-244). Joint Accelerator Conferences Website (JACoW). https://doi.org/10.18429/JACoW-IBIC2018-TUPA15
Furness, Thomas ; Fletcher, Simon ; Williamson, James ; Bertarelli, Alessandro ; Carra, Federico ; Gentini, Luca ; Pasquali, Michele ; Redaelli, Stefano. / Adaptive Collimator Design for Future Particle Accelerators. Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018. editor / Volker RW Schaa ; Christine Petit-Jean-Genaz ; Jan Chrin ; Johan Olander ; Zhichu Chen. Vol. 187 Joint Accelerator Conferences Website (JACoW), 2019. pp. 240-244
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title = "Adaptive Collimator Design for Future Particle Accelerators",
abstract = "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 effecton 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.",
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Furness, T, Fletcher, S, Williamson, J, Bertarelli, A, Carra, F, Gentini, L, Pasquali, M & Redaelli, S 2019, Adaptive Collimator Design for Future Particle Accelerators. in VRW Schaa, C Petit-Jean-Genaz, J Chrin, J Olander & Z Chen (eds), Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018. vol. 187, Joint Accelerator Conferences Website (JACoW), pp. 240-244, 7th International Beam Instrumentation Conference, Shanghai, China, 9/09/18. https://doi.org/10.18429/JACoW-IBIC2018-TUPA15

Adaptive Collimator Design for Future Particle Accelerators. / Furness, Thomas; Fletcher, Simon; Williamson, James; Bertarelli, Alessandro; Carra, Federico; Gentini, Luca; Pasquali, Michele; Redaelli, Stefano.

Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018. ed. / Volker RW Schaa; Christine Petit-Jean-Genaz; Jan Chrin; Johan Olander; Zhichu Chen. Vol. 187 Joint Accelerator Conferences Website (JACoW), 2019. p. 240-244.

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

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AU - Fletcher, Simon

AU - Williamson, James

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AU - Pasquali, Michele

AU - Redaelli, Stefano

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N2 - 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 effecton 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.

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BT - Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018

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A2 - Petit-Jean-Genaz, Christine

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PB - Joint Accelerator Conferences Website (JACoW)

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Furness T, Fletcher S, Williamson J, Bertarelli A, Carra F, Gentini L et al. Adaptive Collimator Design for Future Particle Accelerators. In Schaa VRW, Petit-Jean-Genaz C, Chrin J, Olander J, Chen Z, editors, Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018. Vol. 187. Joint Accelerator Conferences Website (JACoW). 2019. p. 240-244 https://doi.org/10.18429/JACoW-IBIC2018-TUPA15