EN 61788-9:2005

SLOVENSKI SIST EN 61788-9:2005

STANDARD
december 2005
Superprevodnost – 9. del: Meritve volumskih lastnosti visokotemperaturnih
superprevodnikov - Ujet magnetni pretok v oksidnih superprevodnikih z
velikimi zrni (IEC 61788-9:2005)
Superconductivity – Part 9: Measurements for bulk high temperature
superconductors – Trapped flux density of large grain oxide superconductors (IEC
61788-9:2005)
ICS 17.220.20; 29.050 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 61788-9
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2005
ICS 17.220; 29.050
English version
Superconductivity
Part 9: Measurements for bulk high temperature superconductors -
Trapped flux density of large grain oxide superconductors
(IEC 61788-9:2005)
Supraconductivité Supraleitfähigkeit
Partie 9: Mesures pour supraconducteurs Teil 9: Messungen an massiven
haute température massifs – Hochtemperatursupraleitern -
Densité de flux résiduel des oxydes Eingefrorene magnetische Flussdichte
supraconducteurs à gros grains bei grobkörnigen oxidischen Supraleitern
(CEI 61788-9:2005) (IEC 61788-9:2005)

This European Standard was approved by CENELEC on 2005-06-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
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Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61788-9:2005 E
Foreword
The text of document 90/167/FDIS, future edition 1 of IEC 61788-9, prepared by IEC TC 90,
Superconductivity, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC
as EN 61788-9 on 2005-06-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-06-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61788-9:2005 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61788-9:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050-815 2000 International Electrotechnical Vocabulary - -
(IEV)
Chapter 815: Superconductivity

NORME CEI
INTERNATIONALE IEC
61788-9
INTERNATIONAL
Première édition
STANDARD
First edition
2005-04
Supraconductivité –
Partie 9:
Mesures pour supraconducteurs
haute température massifs –
Densité de flux résiduel des oxydes
supraconducteurs à gros grains
Superconductivity –
Part 9:
Measurements for bulk high temperature
superconductors –
Trapped flux density of large grain
oxide superconductors
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électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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61788-9 ¤ IEC:2005 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.9
1 Scope.11
2 Normative references .11
3 Terms and definitions .11
4 Principle .11
5 Requirements .15
6 Apparatus.17
7 Measurement procedure.19
8 Precision and accuracy of the test method.19
9 Test report.21
Annex A (informative) Additional information related to Clauses 3 to 6.23
Annex B (informative) Measurements for levitation force of bulk high temperature
superconductors .29
Annex C (informative) Test report (example).35
Bibliography.39
Figure 1 – Principle of trapped flux density in bulk superconductor .13
Figure 2 – Schematic view of the experimental set-up.15
Figure A.1 – Thickness dependence of the trapped flux density (B ).23
z
Figure A.2 – Gap dependence of the field strength .27
Figure C.1 – Distribution map of trapped flux density .37

61788-9 ¤ IEC:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
__________
SUPERCONDUCTIVITY –
Part 9: Measurements for bulk high temperature superconductors –
Trapped flux density of large grain oxide superconductors
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61788-9 has been prepared by IEC technical committee 90:
Superconductivity.
The text of this standard is based on the following documents:
FDIS Report on voting
90/167/FDIS 90/175/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

61788-9 ¤ IEC:2005 – 7 –
IEC 61788 consists of the following parts, under the general title Superconductivity:
Part 1: Critical current measurement – DC critical current of Cu/Nb-Ti composite super-
conductors
Part 2: Critical current measurement – DC critical current of Nb Sn composite super-
conductors
Part 3: Critical current measurement – DC critical current of Ag-sheathed Bi-2212 and
Bi-2223 oxide superconductors
Part 4: Residual resistance ratio measurement – Residual resistance ratio of Nb-Ti
composite superconductors
Part 5: Matrix to superconductor volume ratio measurement – Copper to superconductor
volume ratio of Cu/Nb-Ti composite superconductors
Part 6: Mechanical properties measurement – Room temperature tensile test of Cu/Nb-Ti
composite superconductors
Part 7: Electronic characteristic measurements – Surface resistance of superconductors at
microwave frequencies
Part 8: AC loss measurements – Total AC loss measurement of Cu/Nb-Ti composite
superconducting wires exposed to a transverse alternating magnetic field by a
pickup coil method
Part 9: Measurements for bulk high temperature superconductors – Trapped flux density of
large grain oxide superconductors
Part 10: Critical temperature measurement – Critical temperature of Nb-Ti, Nb Sn, and
Bi-system oxide composite superconductors by a resistance method
Part 11: Residual resistance ratio measurement – Residual resistance ratio of Nb Sn
composite superconductors
Part 12: Matrix to superconductor volume ratio measurement – Copper to non-copper
volume ratio of Nb Sn composite superconducting wires
Part 13: AC loss measurements – Magnetometer methods for hysteresis loss in Cu/Nb-Ti
multifilamentary composites
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61788-9 ¤ IEC:2005 – 9 –
INTRODUCTION
Large grain bulk high temperature superconductors (BHTSC) have significant potential for a
variety of engineering applications, such as magnetic bearings, flywheel energy storage
systems, load transports, levitation, and trapped flux density magnets. Large grain
superconductors have already been brought to market worldwide.
For industrial applications of bulk superconductors, there are two important material
properties. One is the magnetic levitation force, which determines the tolerable weigh
...