Title :
Characteristics of large Nb-based tunnel junctions for X-ray detection
Author :
Maehata, K. ; Ishibashi, K. ; Nakagawa, H. ; Akoh, H. ; Joosse, E. ; Takada, S. ; Katagiri, M.
Author_Institution :
Dept. of Nucl. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
6/1/1997 12:00:00 AM
Abstract :
A high quality Nb-based tunnel junction with a dimension of 200 /spl mu/m/spl times/200 /spl mu/m was tested by irradiating with X-rays. Two kinds of stable operation modes were observed by applying a magnetic field with different ramping speeds. The junction exhibited a good response to X-rays of 5.9 keV, and FWHM (full width at half maximum) of 93 eV was obtained.
Keywords :
X-ray detection; X-ray spectrometers; niobium; quasiparticles; superconducting device testing; superconducting junction devices; superconducting particle detectors; 200 mum; 5.9 keV; FWHM; Nb; Nb-Al-AlO-Al; X-ray detection; X-ray irradiation; full width at half maximum; good X-ray response; high quality Nb-based tunnel junction; large Nb-based tunnel junctions; magnetic field; ramping speeds; stable operation modes; Artificial intelligence; Capacitance; Energy resolution; Fabrication; Laboratories; Niobium; Pulse amplifiers; Tin; X-ray detection; X-ray detectors;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
