NDLI: A fast and accurate wire scanner instrument for the CERN accelerators to cope with severe environmental constraints and an increased demand for availability

Content Provider	IEEE Xplore Digital Library
Author	Emery, J. Dehning, B. Pereira, C.M. Blasco, J.S. Cantin, S. Tognolini, M. Schneider, B. Henzer, K. Starkier, M.
Copyright Year	2014
Description	Author affiliation: Beam Instrum. Group, Eur. Organ. for Nucl. Res., Geneva, Switzerland (Emery, J.; Dehning, B.; Pereira, C.M.; Blasco, J.S.) \|\| Inst. of Reconfigurable & embedded Digital Syst. (REDS), Univ. of Appl. Sci. Vaud, Yverdon-les-Bains, Switzerland (Henzer, K.; Starkier, M.) \|\| Inst. for Ind. Autom. (IAI), Univ. of Appl. Sci. Vaud, Yverdon-les-Bains, Switzerland (Cantin, S.; Tognolini, M.; Schneider, B.)
Abstract	The Beam Instrumentation group of the European Organization for Nuclear Research (CERN) has been developing an instrument called the Beam Wire Scanner (BWS) for the past few years. This system is used to measure the size of proton beams in the Large Hadron Collider (LHC) and its injector chain. An electro-mechanical system moves a very thin wire of 30 μm through the particle beam and measures the induced radiation losses generated by this interaction. The actuator, based on a Permanent Magnet Synchronous Motor (PMSM), a solid rotor resolver and an in-house designed high precision optical encoder are located in underground installations and have to cope with large irradiation levels. Another difference with respect to its predecessors is the placement of all moving parts in the vacuum. The control electronics is situated far away from the beam tunnels to minimize the destructive impact of ionizing particles. Challenges arise from the long distance between these two parts, up to 250 meters, and the high scanning speed of the wire of up to 20 $ms^{1},$ with a target position accuracy as low as 5 μm rms. This paper describes the challenges of the BWS design, details the current status and introduces the philosophy of its conception to the IEEE control application community.
Starting Page	1139
Ending Page	1145
File Size	866854
Page Count	7
File Format	PDF
ISBN	9781479974092
DOI	10.1109/CCA.2014.6981482
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-08
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wires Particle beams Laser beams Optical fiber sensors Optical fibers Large Hadron Collider
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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