Improved Superconducting Direct Current Meter for 25–50 kA

H.W. Weijers; A. Godeke; B. ten Haken; S. Wessel; H.H.J. ten Kate

doi:10.1007/978-1-4615-2522-6_140

Improved Superconducting Direct Current Meter for 25–50 kA

H.W. Weijers
, A. Godeke
, B. ten Haken
, S. Wessel
, H.H.J. ten Kate

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic

Abstract

An accurate meter to measure direct currents in closed superconducting circuits exposed to high magnetic fields js presented. A toroidal superconducting (sc.) transformer, which consists of a sc. Rogowski pick-up coil and sc. compensation windings, encloses the unknown current The second part of the sc. transformer circuit is a sensing coil around a Hall probe, both perfectly shielded from AC and DC magnetic stray fields. The Hall voltage is amplified and fed back to the compensation current in order to keep the Hall voltage constant. This small compensation current is measured using a shunt and forms an accurate measure for the unknown current. It is used in a second feedback loop to control the unknown current. An additional compensation circuit corrects for undesired magnetic coupling between the current source and the toroidal pick-up coil. With this arrangement a short term accuracy of 0.1% of the full range is obtained. The current is extremely stable, the drift is below 0.25 A per minute. This improved current meter facilitates accurate determination of voltage-current characteristics of superconductors, carrying currents in the range of 25–50 kA and being exposed to high magnetic fields.

Original language	English
Title of host publication	Advances in Cryogenic Engineering
Subtitle of host publication	Proceedings of the 1993 Cryogenic Engineering Conference, held July 12-16, 1993, in Albuquerque, New Mexico
Editors	Peter Kittel
Place of Publication	Boston, MA
Publisher	Springer
Pages	1147-1152
Number of pages	6
ISBN (Electronic)	978-1-4615-2522-6
ISBN (Print)	978-1-4613-6074-2
DOIs	https://doi.org/10.1007/978-1-4615-2522-6_140
Publication status	Published - 1994
Event	1993 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC 1993 - Albuquerque, United States Duration: 12 Jul 1993 → 16 Jul 1993

Publication series

Name	Advances in Cryogenic Engineering
Publisher	Springer
Volume	39
ISSN (Print)	0065-2482

Conference

Conference	1993 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC 1993
Abbreviated title	CEC/ICMC
Country/Territory	United States
City	Albuquerque
Period	12/07/93 → 16/07/93

Access to Document

10.1007/978-1-4615-2522-6_140

Improved superconducting direct current meter for 25-50 kA
Weijers, H. B., Godeke, A., ten Haken, B., Wessel, S. & ten Kate, H. H. J., 12 Jul 1993.
Research output: Contribution to conference › Poster › Other research output

Cite this

Weijers, H. W., Godeke, A., ten Haken, B., Wessel, S., & ten Kate, H. H. J. (1994). Improved Superconducting Direct Current Meter for 25–50 kA. In P. Kittel (Ed.), Advances in Cryogenic Engineering: Proceedings of the 1993 Cryogenic Engineering Conference, held July 12-16, 1993, in Albuquerque, New Mexico (pp. 1147-1152). (Advances in Cryogenic Engineering; Vol. 39). Springer. https://doi.org/10.1007/978-1-4615-2522-6_140

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title = "Improved Superconducting Direct Current Meter for 25–50 kA",

abstract = "An accurate meter to measure direct currents in closed superconducting circuits exposed to high magnetic fields js presented. A toroidal superconducting (sc.) transformer, which consists of a sc. Rogowski pick-up coil and sc. compensation windings, encloses the unknown current The second part of the sc. transformer circuit is a sensing coil around a Hall probe, both perfectly shielded from AC and DC magnetic stray fields. The Hall voltage is amplified and fed back to the compensation current in order to keep the Hall voltage constant. This small compensation current is measured using a shunt and forms an accurate measure for the unknown current. It is used in a second feedback loop to control the unknown current. An additional compensation circuit corrects for undesired magnetic coupling between the current source and the toroidal pick-up coil. With this arrangement a short term accuracy of 0.1\% of the full range is obtained. The current is extremely stable, the drift is below 0.25 A per minute. This improved current meter facilitates accurate determination of voltage-current characteristics of superconductors, carrying currents in the range of 25–50 kA and being exposed to high magnetic fields.",

author = "H.W. Weijers and A. Godeke and \{ten Haken\}, B. and S. Wessel and \{ten Kate\}, H.H.J.",

year = "1994",

doi = "10.1007/978-1-4615-2522-6\_140",

language = "English",

isbn = "978-1-4613-6074-2",

series = "Advances in Cryogenic Engineering",

publisher = "Springer",

pages = "1147--1152",

editor = "Peter Kittel",

booktitle = "Advances in Cryogenic Engineering",

address = "Germany",

note = "1993 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC 1993, CEC/ICMC ; Conference date: 12-07-1993 Through 16-07-1993",

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Weijers, HW, Godeke, A, ten Haken, B, Wessel, S & ten Kate, HHJ 1994, Improved Superconducting Direct Current Meter for 25–50 kA. in P Kittel (ed.), Advances in Cryogenic Engineering: Proceedings of the 1993 Cryogenic Engineering Conference, held July 12-16, 1993, in Albuquerque, New Mexico. Advances in Cryogenic Engineering, vol. 39, Springer, Boston, MA, pp. 1147-1152, 1993 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC 1993, Albuquerque, New Mexico, United States, 12/07/93. https://doi.org/10.1007/978-1-4615-2522-6_140

Improved Superconducting Direct Current Meter for 25–50 kA. / Weijers, H.W.; Godeke, A.; ten Haken, B. et al.
Advances in Cryogenic Engineering: Proceedings of the 1993 Cryogenic Engineering Conference, held July 12-16, 1993, in Albuquerque, New Mexico. ed. / Peter Kittel. Boston, MA: Springer, 1994. p. 1147-1152 (Advances in Cryogenic Engineering; Vol. 39).

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic

TY - CHAP

T1 - Improved Superconducting Direct Current Meter for 25–50 kA

AU - Weijers, H.W.

AU - Godeke, A.

AU - ten Haken, B.

AU - Wessel, S.

AU - ten Kate, H.H.J.

PY - 1994

Y1 - 1994

N2 - An accurate meter to measure direct currents in closed superconducting circuits exposed to high magnetic fields js presented. A toroidal superconducting (sc.) transformer, which consists of a sc. Rogowski pick-up coil and sc. compensation windings, encloses the unknown current The second part of the sc. transformer circuit is a sensing coil around a Hall probe, both perfectly shielded from AC and DC magnetic stray fields. The Hall voltage is amplified and fed back to the compensation current in order to keep the Hall voltage constant. This small compensation current is measured using a shunt and forms an accurate measure for the unknown current. It is used in a second feedback loop to control the unknown current. An additional compensation circuit corrects for undesired magnetic coupling between the current source and the toroidal pick-up coil. With this arrangement a short term accuracy of 0.1% of the full range is obtained. The current is extremely stable, the drift is below 0.25 A per minute. This improved current meter facilitates accurate determination of voltage-current characteristics of superconductors, carrying currents in the range of 25–50 kA and being exposed to high magnetic fields.

AB - An accurate meter to measure direct currents in closed superconducting circuits exposed to high magnetic fields js presented. A toroidal superconducting (sc.) transformer, which consists of a sc. Rogowski pick-up coil and sc. compensation windings, encloses the unknown current The second part of the sc. transformer circuit is a sensing coil around a Hall probe, both perfectly shielded from AC and DC magnetic stray fields. The Hall voltage is amplified and fed back to the compensation current in order to keep the Hall voltage constant. This small compensation current is measured using a shunt and forms an accurate measure for the unknown current. It is used in a second feedback loop to control the unknown current. An additional compensation circuit corrects for undesired magnetic coupling between the current source and the toroidal pick-up coil. With this arrangement a short term accuracy of 0.1% of the full range is obtained. The current is extremely stable, the drift is below 0.25 A per minute. This improved current meter facilitates accurate determination of voltage-current characteristics of superconductors, carrying currents in the range of 25–50 kA and being exposed to high magnetic fields.

U2 - 10.1007/978-1-4615-2522-6_140

DO - 10.1007/978-1-4615-2522-6_140

M3 - Chapter

SN - 978-1-4613-6074-2

T3 - Advances in Cryogenic Engineering

SP - 1147

EP - 1152

BT - Advances in Cryogenic Engineering

A2 - Kittel, Peter

PB - Springer

CY - Boston, MA

T2 - 1993 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC 1993

Y2 - 12 July 1993 through 16 July 1993

ER -

Weijers HW, Godeke A, ten Haken B, Wessel S , ten Kate HHJ. Improved Superconducting Direct Current Meter for 25–50 kA. In Kittel P, editor, Advances in Cryogenic Engineering: Proceedings of the 1993 Cryogenic Engineering Conference, held July 12-16, 1993, in Albuquerque, New Mexico. Boston, MA: Springer. 1994. p. 1147-1152. (Advances in Cryogenic Engineering). doi: 10.1007/978-1-4615-2522-6_140

Improved Superconducting Direct Current Meter for 25–50 kA

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Research output

Improved superconducting direct current meter for 25-50 kA

Cite this