SUPERCONDUCTIVITY - PART 1: CRITICAL CURRENT MEASUREMENT - DC CRITICAL CURRENT OF NB-TI COMPOSITE SUPERCONDUCTORS
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Requirements
6 Apparatus
6.1 Measurement mandrel material
6.2 Mandrel construction
7 Specimen preparation
7.1 Specimen bonding
7.2 Specimen mounting
8 Measurement procedure
9 Uncertainty of the test method
9.1 Critical current
9.2 Temperature
9.3 Magnetic field
9.4 Specimen and mandrel support structure
9.5 Specimen protection
10 Calculation of results
10.1 Critical current criteria
10.2 n-value (optional calculation, refer to A.7.2)
11 Test report
11.1 Identification of test specimen
11.2 Report of I[c] values
11.3 Report of test conditions
Annex A (informative) Additional information relating to
the standard
Annex B (informative) Self-field effect
Annex C (normative) Test method for Cu/Cu-Ni/Nb-Ti composite
superconductors
Annex D (informative) Guidance for estimating winding tensile
force
Bibliography
Covers a test method for the determination of the d.c. critical current of either Cu/Nb-Ti composite superconductors that have a copper/superconductor ratio larger than 1 or Cu/Cu-Ni/Nb-Ti wires that have a copper/superconductor ratio larger than 0,9 and a copper alloy (Cu-Ni)/superconductor ratio larger than 0,2, where the diameter of Nb-Ti superconducting filaments is larger than 1 [mu]m.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 90 |
