Title :
Spatial and temporal dynamics of superconducting Nb/AlO/sub x//Nb tunnel junction detectors
Author :
Hebrank, F. ; Lemke, S. ; Breunig, M. ; Gross, R. ; Doderer, T. ; Huebener, R.P.
Author_Institution :
Physikalisches Inst., Tubingen Univ., Germany
fDate :
3/1/1993 12:00:00 AM
Abstract :
Nb/AlO/sub x//Nb tunnel junction detectors have been irradiated locally with electrons having energies in the range between 6 and 35 keV. By the measurement of the temporal and spatial dynamics of the detector response the characteristic time and length scales of the radiation-induced nonequilibrium state were obtained. The spatially resolved measurements show the importance of the coupled diffusion of the quasi-particles and phonons in the junction electrodes and the wiring and of the phonon propagation in the substrate material. The observed temporal and spatial detector response gives constraints for the development of superconducting-tunnel-junction particle detectors with improved efficiency and energy resolution.<>
Keywords :
aluminium compounds; electron detection and measurement; niobium; particle detectors; superconducting junction devices; type II superconductors; 6 to 35 keV; Nb-AlO/sub x/-Nb junctions; characteristic time; coupled diffusion; length scales; particle detectors; phonon propagation; phonons; quasi-particles; radiation-induced nonequilibrium state; spatial dynamics; superconducting junctions; temporal dynamics; tunnel junction detectors; Electrons; Energy resolution; Josephson junctions; Length measurement; Niobium; Phonons; Radiation detectors; Semiconductor counters; Time factors; Time measurement;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
