Measuring ac losses in superconducting cables using a resonant circuit: resonant current experiment (RESCUE)
| Autor: | Chresten Træholt, Ole Tønnesen, A. Kühle, Søren Krüger Olsen, M. Daumling, C.N. Rasmussen |
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| Rok vydání: | 1998 |
| Předmět: |
Superconductivity
Physics business.industry Metals and Alloys Condensed Matter Physics law.invention Computer Science::Hardware Architecture Capacitor Amplitude law Condensed Matter::Superconductivity Materials Chemistry Ceramics and Composites RLC circuit Optoelectronics Electrical and Electronic Engineering Oscilloscope Alternating current business Rogowski coil Voltage |
| Zdroj: | Superconductor Science and Technology. 11:1306-1310 |
| ISSN: | 1361-6668 0953-2048 |
| Popis: | A simple way to obtain true ac losses with a resonant circuit containing a superconductor, using the decay of the circuit current, is described. For the measurement a capacitor is short circuited with a superconducting cable. Energy in the circuit is provided by either charging up the capacitors with a certain voltage, or letting a dc flow in the superconductor. When the oscillations are started - either by opening a switch in case a dc is flowing or by closing a switch to connect the charged capacitors with the superconductor - the current (via a Rogowski coil) or the voltage on the capacitor can be recorded using, for example, a digital oscilloscope. The amplitude decay of the periodic voltage or current accurately reflects the power loss in the system. It consists of two components - an ohmic purely exponential one (from leads, contacts, etc.), and a nonexponential component originating from the superconductor. The method has been successfully applied for the measurement of the ac loss in a 1 m long superconducting cable model. |
| Databáze: | OpenAIRE |
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