Hostname: page-component-8448b6f56d-gtxcr Total loading time: 0 Render date: 2024-04-20T11:28:37.369Z Has data issue: false hasContentIssue false

Development of an eccentric cam-based active pre-alignment system for the compact linear collider main beam quadrupole magnet

Published online by Cambridge University Press:  16 November 2010

F. Lackner*
Affiliation:
European Organisation for Nuclear Research (CERN), CERN, CH-1211 Genéve 23, Switzerland
K. Artoos
Affiliation:
European Organisation for Nuclear Research (CERN), CERN, CH-1211 Genéve 23, Switzerland
C. Collette
Affiliation:
European Organisation for Nuclear Research (CERN), CERN, CH-1211 Genéve 23, Switzerland
H. M. Durand
Affiliation:
European Organisation for Nuclear Research (CERN), CERN, CH-1211 Genéve 23, Switzerland
C. Hauviller
Affiliation:
European Organisation for Nuclear Research (CERN), CERN, CH-1211 Genéve 23, Switzerland
J. Kemppinen
Affiliation:
European Organisation for Nuclear Research (CERN), CERN, CH-1211 Genéve 23, Switzerland
R. Leuxe
Affiliation:
European Organisation for Nuclear Research (CERN), CERN, CH-1211 Genéve 23, Switzerland
*
Email address for correspondence:Friedrich.Lackner@cern.ch
Get access

Abstract

Compact linear collider (CLIC) is a study for a future electron–positron collider that would allow physicists to explore a new energy region beyond the capabilities of today's particle accelerators. The demanding transverse and vertical beam sizes and emittance specifications are resulting in stringent alignment and a nanometre stability requirement. In the current feasibility study, the main beam quadrupole magnets have to be actively pre-aligned with a precision of 1 µm in five degrees of freedom before being mechanically stabilized to the nanometre scale above 1 Hz. This contribution describes the approach of performing this active pre-alignment based on an eccentric cam system. In order to limit the amplification of the vibration sources at resonant frequencies, a sufficiently high eigenfrequency is required. Therefore, the contact region between cam and support was optimized for adequate stiffness based on the Hertzian theory. Furthermore, practical tests performed on a single-degree-of-freedom mockup will show the limitation factors and further improvements required for successful integration in a full-scale quadrupole mockup presently under design.

Type
Contributed paper
Copyright
Copyright © Diamond Light Source Ltd 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Artoos, K., Capatina, O., Collette, C., Guinchard, M., Hauviller, C., Lackner, F., Pfingstner, J., Schmickler, H., Sylte, M. 2009 Study of the stabilization to the nanometer level of mechanical vibrations of the CLIC main beam quadrupoles. In Proceedings of PAC 09, Vancouver, BC, Canada. TH5RFP080Google Scholar
Herty, A. 2009 Micron precision calibration methods for alignment sensors in particle accelerators. |thMaster thesis, Nottingham Trent University.Google Scholar
Koster, M. P. Vibrations of Cam Mechanisms. Phillips Technical Library Series, Macmillan Press Ltd.CrossRefGoogle Scholar
Norton, R. L. 2009 Cam Design and Manufacturing Handbook, 2nd edn.Industrial Press, Inc. ISBN 978-0-8311-3367-2.Google Scholar
Riddone, G. et al. 2008 Technical specification for the CLIC two-beam module., EPAC 08, Genoa, Italy.Google Scholar
Schlott, V. et al. Dynamic alignment at SLS. In Proceedings EPAC 00, European Organization for Nuclear Research (CERN), Geneva, Switzerland.Google Scholar
Schulte, D. et al. 2009 Beam based alignment in the new CLIC main linac. In PAC 09 Proceedings, Vancouver, Canada.Google Scholar