Accession Number : ADA292642

Title :   Optically Triggered, Superconducting Opening Switch.

Descriptive Note : Final rept.,

Corporate Author : ROCHESTER UNIV NY LAB FOR LASER ENERGETICS

Personal Author(s) : Donaldson, William R. ; Kadin, Alan M.

PDF Url : ADA292642

Report Date : 1994

Pagination or Media Count : 28

Abstract : The advent of high-temperature superconductors (HTS) introduced the possibility of a new class of opening switches. (1) The switches exploit the dramatic change in material properties at the critical temperature, Tc, in the HTS materials. The transition to the normal state can form the basis of an opening switch. Since this phase transition is fully reversible, the switch can be operated repetitively. Such devices could switch currents in the range of a few kA with switching time of the order of nanoseconds. We have developed and tested two types of opening switches based on HTS materials: a photoresistive switch and an inductively coupled switch. Each switch was demonstrated at low power levels and subsequently scaled up to power levels corresponding to tens of amperes current interruption. (MM)

Descriptors :   *OPTICAL SWITCHING, COUPLING(INTERACTION), LOW POWER, PHASE TRANSFORMATIONS, HIGH TEMPERATURE, SUPERCONDUCTORS, CRITICAL TEMPERATURE, ELECTROMAGNETIC INTERFERENCE, ELECTRIC CURRENT, CIRCUIT BREAKERS, TRIGGER CIRCUITS, PHOTORESISTORS.

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE