Effect of Al overlayer thickness on the leakage current of radiation detectors using Nb/Al‐AlOx/Nb superconducting tunnel junctions

1994 ◽  
Vol 76 (8) ◽  
pp. 4761-4765
Author(s):  
A. Matsumura ◽  
T. Takahashi ◽  
M. Kurakado
Keyword(s):  
Leakage Current ◽  
Tunnel Junctions ◽  
Radiation Detectors ◽  
Superconducting Tunnel Junctions

Effects of Quasiparticle Diffusion in Nb-Based Superconducting Tunnel Junctions Under X-Rays Irradiation

1999 ◽  
Vol 13 (09n10) ◽  
pp. 1247-1252
Author(s):  
Emanuela Esposito ◽  
Luigi Frunzio ◽  
Loredana Parlato ◽  
Roberto Cristiano ◽  
Mikhall Lisitskii ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Signal Amplitude ◽  
Radiation Detectors ◽  
Superconducting Tunnel Junctions ◽  
X Rays ◽  
Theoretical Limit ◽  
X Ray ◽  
Operational Temperature ◽  
Amplitude Spectra ◽  
Quasiparticle Diffusion

A novel class of sensors is constituted by radiation detectors based on superconducting tunnel junctions, which could lead in the next future to an advanced instrumentation with an interesting fall out for applications. So far, this area is restricted to LTc superconductors. Among them, niobium has the highest critical temperature and is therefore less demanding in terms of operational temperature. The best performances achieved so far in pure Nb-based junction are far away from the expected theoretical limit. The reason of this discrepancy could be attributed to various problems. Quasiparticle diffusion and edge losses seem to be responsible for the broadening of the signal amplitude spectra so often observed and reported in literature. In this paper we report on efforts to investigate the response to X-Ray of Nb-based superconducting tunnel junctions in terms of a model which includes the quasiparticle diffusion and the edge losses. Our model takes into account the contribution from both the electrodes of the junction and well reproduces the experimental data.

A Search for Stimulated Emission of Radiation From Superconducting Tunnel Junctions

1973 ◽  
Vol 51 (4) ◽  
pp. 465-476 ◽  
Author(s):  
A. A. Fife ◽  
S. Gygax
Keyword(s):  
Energy Gap ◽  
Tunnel Junctions ◽  
Narrow Band ◽  
Frequency Converter ◽  
Broad Band ◽  
Radiation Detectors ◽  
Exhaustive Search ◽  
Stimulated Emission ◽  
Superconducting Tunnel Junctions ◽  
Radiative Emission

A report is made of an exhaustive search for stimulated emission of energy gap radiation from superconducting tunnel junctions of the form Ta–oxide–A1. Two types of radiation detectors have been employed—bolometers for broad band detection and a superconducting frequency converter tunable in the range of interest for narrow band work. The present search has been completely unsuccessful and this negative result has spurred a reexamination of both the theory and the experiments. Serious doubts are raised as to the validity of earlier claims and it is concluded that the previous probable observation of radiative emission requires a different interpretation.

Tantalum superconducting tunnel junctions for photon counting detectors

2002 ◽  
Vol 12 (3) ◽  
pp. 145-148
Author(s):  
C. Jorel ◽  
P. Feautrier ◽  
J.-C. Villégier ◽  
A. Benoit
Keyword(s):  
Tunnel Junctions ◽  
Photon Counting ◽  
Superconducting Tunnel Junctions ◽  
Photon Counting Detectors

scholarly journals Atomic Structure of Superconducting Tunnel Junctions using STEM and APT

2021 ◽  
Vol 27 (S1) ◽  
pp. 2460-2462
Author(s):  
Edwin Supple ◽  
Megan Holtz ◽  
Christopher J. K. Richardson ◽  
Brian Gorman
Keyword(s):  
Atomic Structure ◽  
Tunnel Junctions ◽  
Superconducting Tunnel Junctions

A New Fabrication Process of Superconducting Nb Tunnel Junctions with Ultralow Leakage Current for X-Ray Detection

1993 ◽  
Vol 32 (Part 1, No. 10) ◽  
pp. 4535-4537 ◽  
Author(s):  
Hiroshi Nakagawa ◽  
Gianpiero Pepe ◽  
Hiroshi Akoh ◽  
Luigi Frunzio ◽  
Roberto Cristiano ◽  
...  
Keyword(s):  
Leakage Current ◽  
Tunnel Junctions ◽  
Fabrication Process ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document