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Sensors 2015, 15(11), 28592-28602; doi:10.3390/s151128592

Performance Analysis of the Ironless Inductive Position Sensor in the Large Hadron Collider Collimators Environment

CERN—European Organization for Nuclear Research, Route de Meyrin, Geneva CH-1211, Switzerland
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Author to whom correspondence should be addressed.
Academic Editor: Ha Duong Ngo
Received: 31 July 2015 / Revised: 27 October 2015 / Accepted: 9 November 2015 / Published: 11 November 2015
(This article belongs to the Special Issue Sensors for Harsh Environments)
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Abstract

The Ironless Inductive Position Sensor (I2PS) has been introduced as a valid alternative to Linear Variable Differential Transformers (LVDTs) when external magnetic fields are present. Potential applications of this linear position sensor can be found in critical systems such as nuclear plants, tokamaks, satellites and particle accelerators. This paper analyzes the performance of the I2PS in the harsh environment of the collimators of the Large Hadron Collider (LHC), where position uncertainties of less than 20 µm are demanded in the presence of nuclear radiation and external magnetic fields. The I2PS has been targeted for installation for LHC Run 2, in order to solve the magnetic interference problem which standard LVDTs are experiencing. The paper describes in detail the chain of systems which belong to the new I2PS measurement task, their impact on the sensor performance and their possible further optimization. The I2PS performance is analyzed evaluating the position uncertainty (on 30 s), the magnetic immunity and the long-term stability (on 7 days). These three indicators are assessed from data acquired during the LHC operation in 2015 and compared with those of LVDTs. View Full-Text
Keywords: ironless inductive position sensor; harsh environment; linear variable differential transformer; LHC; collimators; linear position sensing ironless inductive position sensor; harsh environment; linear variable differential transformer; LHC; collimators; linear position sensing
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Danisi, A.; Masi, A.; Losito, R. Performance Analysis of the Ironless Inductive Position Sensor in the Large Hadron Collider Collimators Environment. Sensors 2015, 15, 28592-28602.

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