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本文(IEC 61788-4-2016 Superconductivity - Part 4 Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors《超导性.第4部分 剩余电阻率的测量.Nb-Ti与Nb3Sn复合超导体的剩余电阻率》.pdf)为本站会员(testyield361)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

IEC 61788-4-2016 Superconductivity - Part 4 Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors《超导性.第4部分 剩余电阻率的测量.Nb-Ti与Nb3Sn复合超导体的剩余电阻率》.pdf

1、 IEC 61788-4 Edition 4.0 2016-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Superconductivity Part 4: Residual resistance ratio measurement Residual resistance ratio of Nb-Ti and Nb 3 Sn composite superconductors Supraconductivit Partie 4: Mesurage du rapport de rsistance rsiduelle Rapport de rsist

2、ance rsiduelle des composites supraconducteurs de Nb-Ti et de Nb 3 Sn IEC 61788-4:2016-01(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in

3、 any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional righ

4、ts to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de reproduction rservs. Sauf indication contraire, aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun pro

5、cd, lectronique ou mcanique, y compris la photocopie et les microfilms, sans laccord crit de lIEC ou du Comit national de lIEC du pays du demandeur. Si vous avez des questions sur le copyright de lIEC ou si vous dsirez obtenir des droits supplmentaires sur cette publication, utilisez les coordonnes

6、ci-aprs ou contactez le Comit national de lIEC de votre pays de rsidence. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varemb Fax: +41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organ

7、ization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendm

8、ent might have been published. IEC Catalogue - webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards, Technical Specifications, Technical Reports and other documents. Available for PC, Mac OS, Android Tablets and iP

9、ad. IEC publications search - www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,). It also gives information on projects, replaced and withdrawn publications. IEC Just Published - webstore.iec.ch/justpublis

10、hed Stay up to date on all new IEC publications. Just Published details all new publications released. Available online and also once a month by email. Electropedia - www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions

11、in English and French, with equivalent terms in 15 additional languages. Also known as the International Electrotechnical Vocabulary (IEV) online. IEC Glossary - std.iec.ch/glossary 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of I

12、EC publications issued since 2002. Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR. IEC Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Cen

13、tre: csciec.ch. A propos de lIEC La Commission Electrotechnique Internationale (IEC) est la premire organisation mondiale qui labore et publie des Normes internationales pour tout ce qui a trait llectricit, llectronique et aux technologies apparentes. A propos des publications IEC Le contenu techniq

14、ue des publications IEC est constamment revu. Veuillez vous assurer que vous possdez ldition la plus rcente, un corrigendum ou amendement peut avoir t publi. Catalogue IEC - webstore.iec.ch/catalogue Application autonome pour consulter tous les renseignements bibliographiques sur les Normes internat

15、ionales, Spcifications techniques, Rapports techniques et autres documents de lIEC. Disponible pour PC, Mac OS, tablettes Android et iPad. Recherche de publications IEC - www.iec.ch/searchpub La recherche avance permet de trouver des publications IEC en utilisant diffrents critres (numro de rfrence,

16、 texte, comit dtudes,). Elle donne aussi des informations sur les projets et les publications remplaces ou retires. IEC Just Published - webstore.iec.ch/justpublished Restez inform sur les nouvelles publications IEC. Just Published dtaille les nouvelles publications parues. Disponible en ligne et au

17、ssi une fois par mois par email. Electropedia - www.electropedia.org Le premier dictionnaire en ligne de termes lectroniques et lectriques. Il contient 20 000 termes et dfinitions en anglais et en franais, ainsi que les termes quivalents dans 15 langues additionnelles. Egalement appel Vocabulaire El

18、ectrotechnique International (IEV) en ligne. Glossaire IEC - std.iec.ch/glossary 65 000 entres terminologiques lectrotechniques, en anglais et en franais, extraites des articles Termes et Dfinitions des publications IEC parues depuis 2002. Plus certaines entres antrieures extraites des publications

19、des CE 37, 77, 86 et CISPR de lIEC. Service Clients - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61788-4 Edition 4.0 2016-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Superconductivity Part 4: R

20、esidual resistance ratio measurement Residual resistance ratio of Nb-Ti and Nb 3 Sn composite superconductors Supraconductivit Partie 4: Mesurage du rapport de rsistance rsiduelle Rapport de rsistance rsiduelle des composites supraconducteurs de Nb-Ti et de Nb 3 Sn INTERNATIONAL ELECTROTECHNICAL COM

21、MISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 17.220.20; 29.050 ISBN 978-2-8322-3129-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized

22、 distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 IEC 61788-4:2016 IEC 2016 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 4 Principle 8 5 Apparatus 8 5.1 Material of mea

23、surement mandrel or of measurement base plate 8 5.2 Diameter of the measurement mandrel and length of the measurement base plate . 8 5.3 Cryostat for the resistance (R 2 ) measurement . 9 6 Specimen preparation 9 7 Data acquisition and analysis 9 7.1 Resistance (R 1 ) at room temperature 9 7.2 Resis

24、tance (R 2or * 2 R ) just above the superconducting transition 9 7.2.1 Correction of strain effect 9 7.2.2 Data acquisition of cryogenic resistance 10 7.2.3 Optional acquisition methods . 12 7.3 Correction on measured * 2 R of Nb-Ti composite superconductor for bending strain 12 7.4 Residual resista

25、nce ratio (RRR) 12 8 Uncertainty and stability of the test method . 12 8.1 Temperature . 12 8.2 Voltage measurement . 12 8.3 Current . 13 8.4 Dimension . 13 9 Test report . 13 9.1 RRR value 13 9.2 Specimen 13 9.3 Test conditions . 14 9.3.1 Measurements of R 1and R 2. 14 9.3.2 Measurement of R 114 9.

26、3.3 Measurement of R 214 Annex A (informative) Additional information relating to the measurement of RRR . 15 A.1 Recommendation on specimen mounting orientation . 15 A.2 Alternative methods for increasing temperature of specimen above superconducting transition temperature 15 A.3 Alternative measur

27、ement methods of R 2or * 2 R . 15 A.4 Bending strain dependency of RRR for Nb-Ti composite superconductor 18 A.5 Procedure of correction of bending strain effect 21 Annex B (informative) Uncertainty considerations 23 B.1 Overview. 23 B.2 Definitions. 23 B.3 Consideration of the uncertainty concept 2

28、3 IEC 61788-4:2016 IEC 2016 3 B.4 Uncertainty evaluation example for TC 90 standards . 25 Annex C (informative) Uncertainty evaluation in test method of RRR for Nb-Ti and Nb 3 Sn composite superconductors . 27 C.1 Evaluation of uncertainty . 27 C.2 Summary of round robin test of RRR of a Nb-Ti compo

29、site superconductor . 30 C.3 Reason for large COV value in the intercomparison test on Nb 3 Sn composite superconductor . 31 Bibliography 32 Figure 1 Relationship between temperature and resistance 8 Figure 2 Voltage versus temperature curves and definitions of each voltage 10 Figure A.1 Definition

30、of voltages 17 Figure A.2 Bending strain dependency of RRR value for pure Cu matrix of Nb-Ti composite superconductors (comparison between measured values and calculated values) 19 Figure A.3 Bending strain dependency of RRR value for round Cu wires 19 Figure A.4 Bending strain dependency of normali

31、zed RRR value for round Cu wires 20 Figure A.5 Bending strain dependency of RRR value for rectangular Cu wires . 20 Figure A.6 Bending strain dependency of normalized RRR value for rectangular Cu wires . 21 Figure C.1 Distribution of observed r RRRof Cu/Nb-Ti composite superconductor . 31 Table A.1

32、Minimum diameter of the measurement mandrel for round wires 21 Table A.2 Minimum diameter of the measurement mandrel for rectangular wires 21 Table B.1 Output signals from two nominally identical extensometers 24 Table B.2 Mean values of two output signals . 24 Table B.3 Experimental standard deviat

33、ions of two output signals 24 Table B.4 Standard uncertainties of two output signals 25 Table B.5 COV values of two output signals . 25 Table C.1 Uncertainty of each measurement 30 Table C.2 Obtained values of R 1 , R 2and r RRRfor three Nb 3 Sn samples 31 4 IEC 61788-4:2016 IEC 2016 INTERNATIONAL E

34、LECTROTECHNICAL COMMISSION _ SUPERCONDUCTIVITY Part 4: Residual resistance ratio measurement Residual resistance ratio of Nb-Ti and Nb 3 Sn composite superconductors FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all nationa

35、l electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical S

36、pecifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. Inte

37、rnational, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The f

38、ormal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations

39、 for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user

40、. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication s

41、hall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent cer

42、tification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal i

43、njury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative reference

44、s cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 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 iden

45、tifying any or all such patent rights. International Standard IEC 61788-4 has been prepared by IEC technical committee 90: Superconductivity. This fourth edition cancels and replaces the third edition published in 2011. This edition constitutes a technical revision. This edition includes the followi

46、ng significant technical changes with respect to the previous edition: a) the unification of similar test methods for residual resistance ratio (RRR) of Nb-Ti and Nb 3 Sn composite superconductors, the latter of which is described in IEC 61788-11. IEC 61788-4:2016 IEC 2016 5 The text of this standar

47、d is based on the following documents: FDIS Report on voting 90/359/FDIS 90/360/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.

48、 A list of all parts of the IEC 61788 series, published under the general title Superconductivity, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch

49、“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a co

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