Measurement of the CMS magnetic field

V. I. Klyukhin; A. Ball; F. Bergsma; D. Campi; B. Curé; A. Gaddi; H. Gerwig; A. Hervé; J. Korienek; F. Linde; C. Lindenmeyer; R. Loveless; M. Mulders; T. Nebel; R. P. Smith; D. Stickland; G. Teafoe; L. Veillet; J. K. Zimmerman

doi:10.1109/TASC.2008.921242

Measurement of the CMS magnetic field

V. I. Klyukhin, A. Ball, F. Bergsma, D. Campi, B. Curé, A. Gaddi, H. Gerwig, A. Hervé, J. Korienek, F. Linde, C. Lindenmeyer, R. Loveless, M. Mulders, T. Nebel, R. P. Smith, D. Stickland, G. Teafoe, L. Veillet, J. K. Zimmerman

Physics

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

The measurement of the magnetic field in the tracking volume inside the superconducting coil of the Compact Muon Solenoid (CMS) detector under construction at CERN is done with a fieldmapper designed and produced at Fermilab. The fieldmapper uses 10 3-D B-sensors (Hall probes) developed at NIKHEF and calibrated at CERN to precision 0.05% for a nominal 4 T field. The precise fieldmapper measurements are done in 33840 points inside a cylinder of 1.724 m radius and 7 m long at central fields of 2, 3, 3.5, 3.8, and 4 T. Three components of the magnetic flux density at the CMS coil maximum excitation and the remanent fields on the steel-air interface after discharge of the coil are measured in check-points with 95 3-D B-sensors located near the magnetic flux return yoke elements. Voltages induced in 22 flux-loops made of 405-turn installed on selected segments of the yoke are sampled online during the entire fast discharge (190 s time-constant) of the CMS coil and integrated offline to provide a measurement of the initial magnetic flux density in steel at the maximum field to an accuracy of a few percent. The results of the measurements made at 4 T are reported and compared with a three-dimensional model of the CMS magnet system calculated with TOSCA.

Original language	English (US)
Article number	4520242
Pages (from-to)	395-398
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	18
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2008.921242
State	Published - Jun 2008

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Keywords

Flux-loops
Hall probes
Magnetic field measurements
NMR probes
Superconducting solenoid

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10.1109/TASC.2008.921242

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Klyukhin, V. I., Ball, A., Bergsma, F., Campi, D., Curé, B., Gaddi, A., Gerwig, H., Hervé, A., Korienek, J., Linde, F., Lindenmeyer, C., Loveless, R., Mulders, M., Nebel, T., Smith, R. P., Stickland, D., Teafoe, G., Veillet, L., & Zimmerman, J. K. (2008). Measurement of the CMS magnetic field. IEEE Transactions on Applied Superconductivity, 18(2), 395-398. Article 4520242. https://doi.org/10.1109/TASC.2008.921242

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title = "Measurement of the CMS magnetic field",

abstract = "The measurement of the magnetic field in the tracking volume inside the superconducting coil of the Compact Muon Solenoid (CMS) detector under construction at CERN is done with a fieldmapper designed and produced at Fermilab. The fieldmapper uses 10 3-D B-sensors (Hall probes) developed at NIKHEF and calibrated at CERN to precision 0.05% for a nominal 4 T field. The precise fieldmapper measurements are done in 33840 points inside a cylinder of 1.724 m radius and 7 m long at central fields of 2, 3, 3.5, 3.8, and 4 T. Three components of the magnetic flux density at the CMS coil maximum excitation and the remanent fields on the steel-air interface after discharge of the coil are measured in check-points with 95 3-D B-sensors located near the magnetic flux return yoke elements. Voltages induced in 22 flux-loops made of 405-turn installed on selected segments of the yoke are sampled online during the entire fast discharge (190 s time-constant) of the CMS coil and integrated offline to provide a measurement of the initial magnetic flux density in steel at the maximum field to an accuracy of a few percent. The results of the measurements made at 4 T are reported and compared with a three-dimensional model of the CMS magnet system calculated with TOSCA.",

keywords = "Flux-loops, Hall probes, Magnetic field measurements, NMR probes, Superconducting solenoid",

author = "Klyukhin, {V. I.} and A. Ball and F. Bergsma and D. Campi and B. Cur{\'e} and A. Gaddi and H. Gerwig and A. Herv{\'e} and J. Korienek and F. Linde and C. Lindenmeyer and R. Loveless and M. Mulders and T. Nebel and Smith, {R. P.} and D. Stickland and G. Teafoe and L. Veillet and Zimmerman, {J. K.}",

year = "2008",

month = jun,

doi = "10.1109/TASC.2008.921242",

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Klyukhin, VI, Ball, A, Bergsma, F, Campi, D, Curé, B, Gaddi, A, Gerwig, H, Hervé, A, Korienek, J, Linde, F, Lindenmeyer, C, Loveless, R, Mulders, M, Nebel, T, Smith, RP, Stickland, D, Teafoe, G, Veillet, L & Zimmerman, JK 2008, 'Measurement of the CMS magnetic field', IEEE Transactions on Applied Superconductivity, vol. 18, no. 2, 4520242, pp. 395-398. https://doi.org/10.1109/TASC.2008.921242

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T1 - Measurement of the CMS magnetic field

AU - Klyukhin, V. I.

AU - Ball, A.

AU - Bergsma, F.

AU - Campi, D.

AU - Curé, B.

AU - Gaddi, A.

AU - Gerwig, H.

AU - Hervé, A.

AU - Korienek, J.

AU - Linde, F.

AU - Lindenmeyer, C.

AU - Loveless, R.

AU - Mulders, M.

AU - Nebel, T.

AU - Smith, R. P.

AU - Stickland, D.

AU - Teafoe, G.

AU - Veillet, L.

AU - Zimmerman, J. K.

PY - 2008/6

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N2 - The measurement of the magnetic field in the tracking volume inside the superconducting coil of the Compact Muon Solenoid (CMS) detector under construction at CERN is done with a fieldmapper designed and produced at Fermilab. The fieldmapper uses 10 3-D B-sensors (Hall probes) developed at NIKHEF and calibrated at CERN to precision 0.05% for a nominal 4 T field. The precise fieldmapper measurements are done in 33840 points inside a cylinder of 1.724 m radius and 7 m long at central fields of 2, 3, 3.5, 3.8, and 4 T. Three components of the magnetic flux density at the CMS coil maximum excitation and the remanent fields on the steel-air interface after discharge of the coil are measured in check-points with 95 3-D B-sensors located near the magnetic flux return yoke elements. Voltages induced in 22 flux-loops made of 405-turn installed on selected segments of the yoke are sampled online during the entire fast discharge (190 s time-constant) of the CMS coil and integrated offline to provide a measurement of the initial magnetic flux density in steel at the maximum field to an accuracy of a few percent. The results of the measurements made at 4 T are reported and compared with a three-dimensional model of the CMS magnet system calculated with TOSCA.

AB - The measurement of the magnetic field in the tracking volume inside the superconducting coil of the Compact Muon Solenoid (CMS) detector under construction at CERN is done with a fieldmapper designed and produced at Fermilab. The fieldmapper uses 10 3-D B-sensors (Hall probes) developed at NIKHEF and calibrated at CERN to precision 0.05% for a nominal 4 T field. The precise fieldmapper measurements are done in 33840 points inside a cylinder of 1.724 m radius and 7 m long at central fields of 2, 3, 3.5, 3.8, and 4 T. Three components of the magnetic flux density at the CMS coil maximum excitation and the remanent fields on the steel-air interface after discharge of the coil are measured in check-points with 95 3-D B-sensors located near the magnetic flux return yoke elements. Voltages induced in 22 flux-loops made of 405-turn installed on selected segments of the yoke are sampled online during the entire fast discharge (190 s time-constant) of the CMS coil and integrated offline to provide a measurement of the initial magnetic flux density in steel at the maximum field to an accuracy of a few percent. The results of the measurements made at 4 T are reported and compared with a three-dimensional model of the CMS magnet system calculated with TOSCA.

KW - Flux-loops

KW - Hall probes

KW - Magnetic field measurements

KW - NMR probes

KW - Superconducting solenoid

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JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2

M1 - 4520242

ER -

Measurement of the CMS magnetic field

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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