IEC 61788-13:2012

Superconductivity - Part 13: AC loss measurements - Magnetometer methods for hysteresis loss in superconducting multifilamentary composites

IEC 61788-13:2012 describes considerations for the measurement of hysteretic loss in Cu/Nb-Ti multifilamentary composites using DC- or low-ramp-rate magnetometry. This international standard specifies a method of the measurement of hysteretic loss in multifilamentary Cu/Nb-Ti composite conductors. Measurements are assumed to be on round wires with temperatures at or near 4,2 K. DC or low-ramp-rate magnetometry will be performed using either a superconducting quantum interference device or a vibrating-sample magnetometer. Extension to the measurement of superconductors in general is given in Annex. This second edition cancels and replaces the first edition published in 2003. It constitutes a technical revision. Modifications made to the second edition extend to the measurement of superconductors in general, in various sample sizes and shapes, and at temperatures other than 4,2 K, and use the word "uncertainty" for all quantitative statistical expressions to eliminate the quantitative use of "precision" and "accuracy".

Supraconductivité - Partie 13: Mesure des pertes en courant alternatif - Méthodes de mesure par magnétomètre des pertes par hystérésis dans les composites multifilamentaires supraconducteurs

La CEI 61788-13:2012 décrit des éléments nécessaires pour mesurer les pertes par hystérésis dans les composites multifilamentaires de Cu/Nb-Ti au moyen d'un magnétomètre à courant continu ou à faible vitesse de rampe. La présente norme internationale spécifie une méthode de mesure des pertes par hystérésis dans les conducteurs composites multifilamentaires de Cu/Nb-Ti. On suppose que les mesures sont effectuées sur des fils ronds à des températures égales ou proches de 4,2 K. La magnétométrie en courant continu ou à faible vitesse de rampe sera effectuée au moyen d'un interféromètre quantique supraconducteur ou d'un magnétomètre à échantillon vibrant. L'extension à la mesure des supraconducteurs en général est donnée en Annexe. Cette deuxième édition annule et remplace la première édition parue en 2003. Cette édition constitue une révision technique. Les modifications apportées à la deuxième édition sont une extension à la mesure des supraconducteurs en général, de tailles et formes d'échantillons diverses et à des températures différentes de 4,2 K, et le remplacement par le mot "incertitude" pour toutes les expressions statistiques quantitatives utilisant les termes "précision" et "exactitude".

General Information

• Status: Published
• Publication Date: 24-Jul-2012
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.200.20 - Temperature-measuring instruments
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 29.050 - Superconductivity and conducting materials
• Technical Committee: TC 90 - Superconductivity
• Current Stage: PPUB - Publication issued
• Start Date: 31-Aug-2012
• Completion Date: 25-Jul-2012

Relations

• Revises: IEC 61788-13:2003 - Superconductivity - Part 13: AC loss measurements - Magnetometer methods for hysteresis loss in Cu/Nb-Ti multifilamentary composites
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61788-13 ®
Edition 2.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Superconductivity –
Part 13: AC loss measurements – Magnetometer methods for hysteresis loss in
superconducting multifilamentary composites

Supraconductivité –
Partie 13: Mesure des pertes en courant alternatif – Méthodes de mesure par
magnétomètre des pertes par hystérésis dans les composites multifilamentaires
supraconducteurs
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IEC 61788-13 ®
Edition 2.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Superconductivity –
Part 13: AC loss measurements – Magnetometer methods for hysteresis loss in

superconducting multifilamentary composites

Supraconductivité –
Partie 13: Mesure des pertes en courant alternatif – Méthodes de mesure par

magnétomètre des pertes par hystérésis dans les composites multifilamentaires

supraconducteurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 17.220, 29.050 ISBN 978-2-83220-292-0

– 2 – 61788-13 © IEC:2012
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General specifications . 8
4.1 Target uncertainty . 8
4.2 Uncertainty and uniformity of the applied field . 8
4.3 VSM calibration . 8
4.4 Temperature . 9
4.5 Specimen length . 9
4.6 Specimen orientation and demagnetization effects . 9
4.7 Normalization volume . 9
4.8 Mode of field cycling or sweeping . 9
5 The VSM method of measurement . 10
5.1 General . 10
5.2 VSM measurement principle . 10
5.3 VSM specimen preparation . 10
5.4 VSM measurement conditions and calibration . 12
5.4.1 Field amplitude . 12
5.4.2 Direction of applied field . 12
5.4.3 Rate of change of the applied field (sweep rate) . 12
5.4.4 Waveform of the field change . 12
5.4.5 Specimen size and shape correction . 12
5.4.6 Allowance for addendum (background subtraction) . 13
5.4.7 Data point density . 13
6 Test report . 13
6.1 General . 13
6.2 Initiation of the test . 13
6.3 Technical details . 13
Annex A (informative) The SQUID method of measurement . 15
Annex B (normative) Extension of the standard to the measurement of
superconductors in general . 16
Annex C (informative) Uncertainty considerations . 18
Bibliography . 23

Figure 1 – A typical experimental setup of VSM measurement . 11
Figure 2 – Three alternative specimen configurations for the VSM measurement . 11

Table C.1 – Output signals from two nominally identical extensometers . 19
Table C.2 – Mean values of two output signals . 19
Table C.3 – Experimental standard deviations of two output signals . 19
Table C.4 – Standard uncertainties of two output signals . 20
Table C.5 – Coefficient of variations of two output signals . 20

61788-13 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
SUPERCONDUCTIVITY –
Part 13: AC loss measurements –
Magnetometer methods for hysteresis loss
in superconducting multifilamentary composites

FOREWORD
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International Standard IEC 61788-13 has been prepared by IEC technical committee 90:
Superconductivity.
This second edition cancels and replaces the first edition published in 2003. It constitutes a
technical revision.
Modifications made to the second edition are
– to extend to the measurement of superconductors in general, in various sample sizes and
shapes, and at temperatures other than 4,2 K,
– to use the word “uncertainty” for all quantitative (associated with a number) sta
...