A high-precision miniaturized rotating coil transducer for magnetic measurements

Arpaia, P.; Buzio, M.; De Oliveira, R.; DiMarco, J.; Severino, G.

doi:10.1016/j.sna.2018.01.064

Title: A high-precision miniaturized rotating coil transducer for magnetic measurements

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Abstract

A miniaturized Printed Circuit Board (PCB) sensing coil, jointly developed by CERN and Fermilab for measuring the field of small-gap (less than 10 mm) accelerator magnets, is illustrated. A sensing coil array, with a scheme for compensating the main field when measuring the harmonic error components, hosted on a synthetic sapphire-based transducer, is presented. Key innovating features are (i) very-small size, both for the sensing coil array (thickness of 1.380 mm) and for the transducer (overall diameter of 7.350 mm), (ii) metrological performance, namely accuracy (more than five times better than state of the art), and 1-sigma repeatability (ten times better on harmonics with amplitude less than 100 ppm), and (iii) manufacturing technology of both the coil array (13 double layers aligned within 10 μm), and the sapphire support (concentricity, the most important uncertainty source for rotating coils, 3 μm of uncertainty, namely one order of magnitude better than fiberglass support). After stating the measurement problem, the design of the transducer and a case study of a two-layer PCB sensor array are also illustrated. Then, the prototyping and quality control of both the sensor and the transducer are discussed. Furthermore, the calibration and the results obtained with a prototype setupmore »« less

Authors:

Arpaia, P. ^[1]; Buzio, M. ^[2]; De Oliveira, R. ^[2]; DiMarco, J. ^[3]; Severino, G. ^[4]

Univ. of Naples Federico II (Italy). Dept. of Electrical Engineering and Information Technology; European Organization for Nuclear Research (CERN), Geneva (Switzerland). Technology Dept.
European Organization for Nuclear Research (CERN), Geneva (Switzerland). Technology Dept.
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Technical Division
European Organization for Nuclear Research (CERN), Geneva (Switzerland). Technology Dept.; Univ. of Sannio, Benevento (Italy)

Publication Date:: Thu Feb 08 00:00:00 EST 2018

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); European Union (EU); European Organization for Nuclear Research (CERN), Geneva (Switzerland)

OSTI Identifier:: 1438534

Report Number(s):: FERMILAB-PUB-18-209-TD
Journal ID: ISSN 0924-4247; 1673604; TRN: US1900448

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: Sensors and Actuators. A, Physical

Additional Journal Information:: Journal Volume: 274; Journal Issue: C; Journal ID: ISSN 0924-4247

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 43 PARTICLE ACCELERATORS; 84.32.Hh/coils; induction; 85.75.Ss/sensors magnetic field; 06.20.fb/calibration; 07.55.Ge/measurement of magnetic field; 41.20.-q/magnetic field in electromagnetism

Citation Formats


                    Arpaia, P., Buzio, M., De Oliveira, R., DiMarco, J., and Severino, G. A high-precision miniaturized rotating coil transducer for magnetic measurements.  United States: N. p., 2018. 
Web.  doi:10.1016/j.sna.2018.01.064.

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                    Arpaia, P., Buzio, M., De Oliveira, R., DiMarco, J., & Severino, G. A high-precision miniaturized rotating coil transducer for magnetic measurements.  United States.  https://doi.org/10.1016/j.sna.2018.01.064

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                    Arpaia, P., Buzio, M., De Oliveira, R., DiMarco, J., and Severino, G. Thu .  
"A high-precision miniaturized rotating coil transducer for magnetic measurements".  United States.  https://doi.org/10.1016/j.sna.2018.01.064.  https://www.osti.gov/servlets/purl/1438534.

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@article{osti_1438534,

  title        = {A high-precision miniaturized rotating coil transducer for magnetic measurements},

  author       = {Arpaia, P. and Buzio, M. and De Oliveira, R. and DiMarco, J. and Severino, G.},

  abstractNote = {A miniaturized Printed Circuit Board (PCB) sensing coil, jointly developed by CERN and Fermilab for measuring the field of small-gap (less than 10 mm) accelerator magnets, is illustrated. A sensing coil array, with a scheme for compensating the main field when measuring the harmonic error components, hosted on a synthetic sapphire-based transducer, is presented. Key innovating features are (i) very-small size, both for the sensing coil array (thickness of 1.380 mm) and for the transducer (overall diameter of 7.350 mm), (ii) metrological performance, namely accuracy (more than five times better than state of the art), and 1-sigma repeatability (ten times better on harmonics with amplitude less than 100 ppm), and (iii) manufacturing technology of both the coil array (13 double layers aligned within 10 μm), and the sapphire support (concentricity, the most important uncertainty source for rotating coils, 3 μm of uncertainty, namely one order of magnitude better than fiberglass support). After stating the measurement problem, the design of the transducer and a case study of a two-layer PCB sensor array are also illustrated. Then, the prototyping and quality control of both the sensor and the transducer are discussed. Furthermore, the calibration and the results obtained with a prototype setup at Fermilab are presented. Finally, in the appendix, the theory of the rotating coil, the sensor geometry, and the harmonic compensation are briefly reviewed for the reader easiness.},

  doi          = {10.1016/j.sna.2018.01.064},

  journal      = {Sensors and Actuators. A, Physical},

  number       = C,

  volume       = 274,

  place        = {United States},

  year         = {Thu Feb 08 00:00:00 EST 2018},

  month        = {Thu Feb 08 00:00:00 EST 2018}

}

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