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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hull, J.R. |
| Copyright Year | 2002 |
| Abstract | The author reviews major high-temperature superconductor (NTS) current-lead concepts and presents several new considerations that should affect design of HTS leads. Considerable advantage is achieved by operating these leads with an intermediate-temperature heat sink. The HTS part of the lead can be made from pressed and sintered powder. Powder-in-tube fabrication is also possible, but the normal metal part of the lead acts as a thermal short and cannot provide much stabilization without increasing the refrigeration requirement. For lead stability, designs with low current density are favored. Such leads can be manufactured with today's technology, and refrigeration requirements are lower for the same allowable burnout time. Higher current densities result in lower helium boil-off for the same lead length, but burnout times can be very short. In comparing experiment to theory in open systems, the density of helium vapor must be accounted for in calculating the expected boil-off. For very-low-loss leads, two-dimensional heat transfer and the state of the dewar near the leads may play dominant roles in lead performance.< |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 869 |
| Ending Page | 875 |
| Page Count | 7 |
| File Size | 977948 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 3 |
| Issue Number | 1 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1993-03-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | High temperature superconductors Refrigeration Current density Heat sinks Powders Fabrication Stability Manufacturing Open systems |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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