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.
In-situ displacement measurement for use in LHC collimators / Furness, T.; Williamson, J.; Fletcher, S.; Iqbal, A.; Bell, A.; Henning, A.; Martin, H.; Jiang, X.; Bertarelli, A.; Carra, F.; Pasquali, M.; Radaelli, S.. - (2020), pp. 309-312. (Intervento presentato al convegno 20th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2020 tenutosi a Starling Geneva Hotel, aut).
In-situ displacement measurement for use in LHC collimators
Pasquali M.Investigation
;
2020
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
