In-situ displacement measurement for use in LHC collimators

Thomas Furness; James Williamson; Simon Fletcher; Ali Iqbal; Andrew Bell; Andrew Henning; Haydn Martin; Jane Jiang; Alessandro Bertarelli; Federico Carra; Michele Pasquali; Stefano Redaelli

In-situ displacement measurement for use in LHC collimators

Thomas Furness, James Williamson, Simon Fletcher, Ali Iqbal, Andrew Bell, Andrew Henning, Haydn Martin, Jane Jiang, Alessandro Bertarelli, Federico Carra, Michele Pasquali, Stefano Redaelli

CERN

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The Adaptive Collimation System (ACS) is a closed-loop control system that can monitor and correct collimator jaw straightness deviations. Key to the operation of the ACS is a fibre-based interferometric strain measurement system mounted in the jaws that can detect straightness deviations. This system utilises spectral interferometry to interrogate multiple strain sensitive intrinsic Fabry-Perot interferometer (IFPI) cavities that can detect localised thermal and vibratory deformations within the jaw structure and allow for their correction. This paper outlines the operation of the fibre-based measurement system, construction and integration challenges, both environmental and mechanical. Finally, preliminary experimental results are described which indicate the system is sufficiently sensitive to observe a second order response from a 1.5 μm first order displacement (bend) of the jaw.

Original language	English
Title of host publication	Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology
Subtitle of host publication	Euspen 2020, Virtual Conference
Editors	Richard K. Leach, David Billington, C. Nisbet, D. Phillips
Publisher	euspen
Chapter	5
Pages	309-312
Number of pages	4
ISBN (Electronic)	9780995775176
Publication status	Published - 12 Jun 2020
Event	20th International Conference of the European Society for Precision Engineering and Nanotechnology - Virtual Conference , Geneva, Virtual, Austria Duration: 8 Jun 2020 → 12 Jun 2020 Conference number: 20 https://www.euspen.eu/events/vc-2020/

Conference

Conference	20th International Conference of the European Society for Precision Engineering and Nanotechnology
Abbreviated title	ICE20
Country/Territory	Austria
City	Geneva, Virtual
Period	8/06/20 → 12/06/20
Internet address	https://www.euspen.eu/events/vc-2020/

Cite this

Furness, T., Williamson, J., Fletcher, S., Iqbal, A., Bell, A., Henning, A., Martin, H., Jiang, J., Bertarelli, A., Carra, F., Pasquali, M., & Redaelli, S. (2020). In-situ displacement measurement for use in LHC collimators. In R. K. Leach, D. Billington, C. Nisbet, & D. Phillips (Eds.), Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology: Euspen 2020, Virtual Conference (pp. 309-312). Article P5.08 euspen.

Furness, Thomas ; Williamson, James ; Fletcher, Simon et al. / In-situ displacement measurement for use in LHC collimators. Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology: Euspen 2020, Virtual Conference. editor / Richard K. Leach ; David Billington ; C. Nisbet ; D. Phillips. euspen, 2020. pp. 309-312

@inproceedings{66196277403b4270871e2ab357f2be74,

title = "In-situ displacement measurement for use in LHC collimators",

abstract = "The Adaptive Collimation System (ACS) is a closed-loop control system that can monitor and correct collimator jaw straightness deviations. Key to the operation of the ACS is a fibre-based interferometric strain measurement system mounted in the jaws that can detect straightness deviations. This system utilises spectral interferometry to interrogate multiple strain sensitive intrinsic Fabry-Perot interferometer (IFPI) cavities that can detect localised thermal and vibratory deformations within the jaw structure and allow for their correction. This paper outlines the operation of the fibre-based measurement system, construction and integration challenges, both environmental and mechanical. Finally, preliminary experimental results are described which indicate the system is sufficiently sensitive to observe a second order response from a 1.5 μm first order displacement (bend) of the jaw.",

keywords = "Collimators, LHC, Strain measurement, Interferometry, Collimator",

author = "Thomas Furness and James Williamson and Simon Fletcher and Ali Iqbal and Andrew Bell and Andrew Henning and Haydn Martin and Jane Jiang and Alessandro Bertarelli and Federico Carra and Michele Pasquali and Stefano Redaelli",

year = "2020",

month = jun,

day = "12",

language = "English",

pages = "309--312",

editor = "Leach, \{Richard K.\} and David Billington and C. Nisbet and D. Phillips",

booktitle = "Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology",

publisher = "euspen",

address = "United Kingdom",

note = "20th International Conference of the European Society for Precision Engineering and Nanotechnology, ICE20 ; Conference date: 08-06-2020 Through 12-06-2020",

url = "https://www.euspen.eu/events/vc-2020/",

}

Furness, T , Williamson, J , Fletcher, S, Iqbal, A, Bell, A, Henning, A , Martin, H , Jiang, J, Bertarelli, A, Carra, F, Pasquali, M & Redaelli, S 2020, In-situ displacement measurement for use in LHC collimators. in RK Leach, D Billington, C Nisbet & D Phillips (eds), Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology: Euspen 2020, Virtual Conference., P5.08, euspen, pp. 309-312, 20th International Conference of the European Society for Precision Engineering and Nanotechnology, Geneva, Virtual, Austria, 8/06/20.

In-situ displacement measurement for use in LHC collimators. / Furness, Thomas ; Williamson, James ; Fletcher, Simon et al.
Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology: Euspen 2020, Virtual Conference. ed. / Richard K. Leach; David Billington; C. Nisbet; D. Phillips. euspen, 2020. p. 309-312 P5.08.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - In-situ displacement measurement for use in LHC collimators

AU - Furness, Thomas

AU - Williamson, James

AU - Fletcher, Simon

AU - Iqbal, Ali

AU - Bell, Andrew

AU - Henning, Andrew

AU - Martin, Haydn

AU - Jiang, Jane

AU - Bertarelli, Alessandro

AU - Carra, Federico

AU - Pasquali, Michele

AU - Redaelli, Stefano

N1 - Conference code: 20

PY - 2020/6/12

Y1 - 2020/6/12

N2 - The Adaptive Collimation System (ACS) is a closed-loop control system that can monitor and correct collimator jaw straightness deviations. Key to the operation of the ACS is a fibre-based interferometric strain measurement system mounted in the jaws that can detect straightness deviations. This system utilises spectral interferometry to interrogate multiple strain sensitive intrinsic Fabry-Perot interferometer (IFPI) cavities that can detect localised thermal and vibratory deformations within the jaw structure and allow for their correction. This paper outlines the operation of the fibre-based measurement system, construction and integration challenges, both environmental and mechanical. Finally, preliminary experimental results are described which indicate the system is sufficiently sensitive to observe a second order response from a 1.5 μm first order displacement (bend) of the jaw.

AB - The Adaptive Collimation System (ACS) is a closed-loop control system that can monitor and correct collimator jaw straightness deviations. Key to the operation of the ACS is a fibre-based interferometric strain measurement system mounted in the jaws that can detect straightness deviations. This system utilises spectral interferometry to interrogate multiple strain sensitive intrinsic Fabry-Perot interferometer (IFPI) cavities that can detect localised thermal and vibratory deformations within the jaw structure and allow for their correction. This paper outlines the operation of the fibre-based measurement system, construction and integration challenges, both environmental and mechanical. Finally, preliminary experimental results are described which indicate the system is sufficiently sensitive to observe a second order response from a 1.5 μm first order displacement (bend) of the jaw.

KW - Collimators

KW - LHC

KW - Strain measurement

KW - Interferometry

KW - Collimator

UR - https://www.euspen.eu/product-category/book/

UR - https://www.scopus.com/pages/publications/85091584669

M3 - Conference contribution

SP - 309

EP - 312

BT - Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology

A2 - Leach, Richard K.

A2 - Billington, David

A2 - Nisbet, C.

A2 - Phillips, D.

PB - euspen

T2 - 20th International Conference of the European Society for Precision Engineering and Nanotechnology

Y2 - 8 June 2020 through 12 June 2020

ER -

Furness T , Williamson J , Fletcher S, Iqbal A, Bell A, Henning A et al. In-situ displacement measurement for use in LHC collimators. In Leach RK, Billington D, Nisbet C, Phillips D, editors, Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology: Euspen 2020, Virtual Conference. euspen. 2020. p. 309-312. P5.08

In-situ displacement measurement for use in LHC collimators

Abstract

Conference

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