Laser-triggered superconducting opening switch

Shirshak K. Dhali; Mohammad Mohsin

doi:10.1117/12.25842

1 March 1991 Laser-triggered superconducting opening switch

Shirshak K. Dhali, Mohammad Mohsin

Proceedings Volume 1396, Applications of Optical Engineering: Proceedings of OE/Midwest '90; (1991) https://doi.org/10.1117/12.25842
Event: Applications of Optical Engineering: Proceedings of OE/Midwest '90, 1990, Rosemont, IL, United States

Abstract

We report the results of an experimental and modeling investigation of a high temperature superconducting opening switch. The switch was fabricated using a thin film of YBaCuO on a strontium titanate substrate and a Ar-Ion laser was used as a trigger source. When one of the critical parameters of a superconductor exceeds the critical value it makes a transition to a non-superconducting state (high resistance state). The change in resistance of a superconducting thin film due to electromagnetic radiation can be accounted for by two mechanisms:1 (1) the photon interacts with the thin film through optically induced phase process in the relative weak " boundary Josephson junctions" between the grains and (2) the radiation simply heats the thin film above the critical temperature (T). The dependence of the switching characteristics (switching time off resistance) on the bias (operating temperature and operating current) and trigger intensity will be discussed. Also the results of model based on heat equations and circuit laws will be discussed. 1.

Citation Download Citation

Shirshak K. Dhali and Mohammad Mohsin "Laser-triggered superconducting opening switch", Proc. SPIE 1396, Applications of Optical Engineering: Proceedings of OE/Midwest '90, (1 March 1991); https://doi.org/10.1117/12.25842

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