Active Vibration Isolation System for CLIC Final Focus

Balik, G.; Allemandou, Nicolas; Allibe, Julie; Baud, Jean Philippe; Brunetti, L.; Caron, Bernard; Deleglise, Guillaume; Hernández, Camilo; Jérémie, A.; Vilalte, S.

doi:10.18429/jacow-ipac2014-tupri088

Proceedings of the 5th Int. Particle Accelerator Conf. 2014

DOI: 10.18429/jacow-ipac2014-tupri088

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Active Vibration Isolation System for CLIC Final Focus

G. Balik

Nicolas Allemandou

Julie Allibe

et al.

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2018

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Vibration Control Using a Dedicated Inertial Sensor

Balik¹,

Caron²,

Aimard³

et al. 2018

IEEE Sensors J.

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International audienceThe Compact Linear Collider (CLIC) project is right in the development phase. In this prospect, the main objective of the final focus stabilization is to succeed in damping ground motion vibration at the sub-nanometer scale to avoid any unwanted motion of the two last final focus magnets. Active vibration control using high-resolution industrial seismic sensors has already shown its limits in the desired range of attenuation [4-100] Hz. Hence, a dedicated inertial sensor has been designed, tuned to fit CLIC requirements. It doesn't contain any feedback or coil which would linearize its dynamic in its bandwidth [0.1-100] Hz, avoiding electrical noise or thermal noise, and when used for active control, enhancing its performances thanks to the internal resonance. An analytical modeling of the sensor dynamic behavior also shown experimentally gives a first internal resonance around 11 Hz. This paper is complemented by a comparative measurement with high precision industrial sensors. A noise level 2.5 times better (0.04 nm at 4 Hz) has been achieved. This sensor has also been tested in the context of vibration rejection with a sub-nanometer active vibration rejection support. Experimental results have been compared with the one obtained with the state-of-the-art industrial sensors. Vertical seismic motion attenuation results have shown unprecedented performances. A damping ratio of 8.5 has been achieved at 4 Hz, leading to an rms displacement of the support of 0.25 nm thanks to the active support prototype and the dedicated sensor

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Vibration Control Using a Dedicated Inertial Sensor

Balik¹,

Caron²,

Aimard³

et al. 2018

IEEE Sensors J.

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show abstract

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Active Vibration Isolation System for CLIC Final Focus

Cited by 1 publication

References 6 publications

Vibration Control Using a Dedicated Inertial Sensor

Vibration Control Using a Dedicated Inertial Sensor

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