| Title | Cryogen-free lkA-class Ic measurement system featuring an 8 T HTS magnet |
| Publication Type | Journal Article |
| Year of Publication | 2014 |
| Authors | Strickland, N.M., Hoffmann C., Wimbush S.C., Pooke D.M., Huang T., Lazic Z., Chamritski V., Talantsev E.F., Long N.J., and Tallon J.L. |
| Journal | Journal of Physics: Conference Series |
| Volume | 507 |
| Issue | PART 2 |
| Date Published | 2014 |
| ISSN | 17426588 (ISSN) |
| Keywords | C (programming language), Conduction cooled, Cryocoolers, Magnets, Measurement system, Measurements, Measuring systems, Metal-organic, RABiTS substrates, Superconductivity, Temperature rise, Transport currents, Wire, Yttrium barium copper oxides |
| Abstract | We have developed a cryogen-free critical-current (Ic) measuring system comprising a conduction-cooled 8 T HTS magnet and convection-cooled sample, both cooled by commercial cryocoolers. The sample can be rotated and transport currents of up to 800 A delivered with less than 0.5 K temperature rise during the Ic measurement. The system is automated with respect to variations in temperature (30-90 K), field (0-8 T), and field angle (0-360°). We have used this system to measure HTS wire samples, concentrating on metal-organic deposited YBCO on RABiTS substrates. Particular emphasis is given to the evolution of Ic anisotropy with temperature, and the dangers of extrapolating from 77 K to 30 K. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-84902283815&partnerID=40&md5=22c2ff293faa399c9f0583b106344b53 |
| DOI | 10.1088/1742-6596/507/2/022037 |
