Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV

N. Rando; A. Peacock; A. van Dordrecht; P. Hubnes; P. Videles; Jorma Salmi; Ilkka Suni

doi:10.1063/1.357607

Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV

N. Rando, A. Peacock, A. van Dordrecht, P. Hubnes, P. Videles, Jorma Salmi, Ilkka Suni

VTT Technical Research Centre of Finland

European Space Research and Technology Centre (ESTEC)

Research output: Contribution to journal › Article › Scientific › peer-review

10 Citations (Scopus)

Abstract

Recent experimental results show a linear energy response in high quality Nb‐Al‐AlO x ‐Nb superconducting tunnel junction detectors for photon energies between 1.5 and 6.4 keV. The experimental data are based on both direct x‐ray illumination and on the escape and re‐absorption of fluorescent photons created in the junction electrodes and in the silicon substrate. The observed linearity of the energy response raises questions on the validity of some theoretical models which describe the relaxation process occurring in a superconducting thin film after x‐ray photoabsorption. Such models generally predict nonlinear effects due to large quasiparticle number densities and short recombination times.

Original language	English
Pages (from-to)	2490-2493
Journal	Journal of Applied Physics
Volume	76
Issue number	4
DOIs	https://doi.org/10.1063/1.357607
Publication status	Published - 1994
MoE publication type	A1 Journal article-refereed

Access to Document

10.1063/1.357607

Cite this

@article{b9682a421d34420285d3fd622fdd502e,

title = "Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV",

abstract = "Recent experimental results show a linear energy response in high quality Nb‐Al‐AlO x ‐Nb superconducting tunnel junction detectors for photon energies between 1.5 and 6.4 keV. The experimental data are based on both direct x‐ray illumination and on the escape and re‐absorption of fluorescent photons created in the junction electrodes and in the silicon substrate. The observed linearity of the energy response raises questions on the validity of some theoretical models which describe the relaxation process occurring in a superconducting thin film after x‐ray photoabsorption. Such models generally predict nonlinear effects due to large quasiparticle number densities and short recombination times.",

author = "N. Rando and A. Peacock and {van Dordrecht}, A. and P. Hubnes and P. Videles and Jorma Salmi and Ilkka Suni",

year = "1994",

doi = "10.1063/1.357607",

language = "English",

volume = "76",

pages = "2490--2493",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "4",

}

TY - JOUR

T1 - Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV

AU - Rando, N.

AU - Peacock, A.

AU - van Dordrecht, A.

AU - Hubnes, P.

AU - Videles, P.

AU - Salmi, Jorma

AU - Suni, Ilkka

PY - 1994

Y1 - 1994

N2 - Recent experimental results show a linear energy response in high quality Nb‐Al‐AlO x ‐Nb superconducting tunnel junction detectors for photon energies between 1.5 and 6.4 keV. The experimental data are based on both direct x‐ray illumination and on the escape and re‐absorption of fluorescent photons created in the junction electrodes and in the silicon substrate. The observed linearity of the energy response raises questions on the validity of some theoretical models which describe the relaxation process occurring in a superconducting thin film after x‐ray photoabsorption. Such models generally predict nonlinear effects due to large quasiparticle number densities and short recombination times.

AB - Recent experimental results show a linear energy response in high quality Nb‐Al‐AlO x ‐Nb superconducting tunnel junction detectors for photon energies between 1.5 and 6.4 keV. The experimental data are based on both direct x‐ray illumination and on the escape and re‐absorption of fluorescent photons created in the junction electrodes and in the silicon substrate. The observed linearity of the energy response raises questions on the validity of some theoretical models which describe the relaxation process occurring in a superconducting thin film after x‐ray photoabsorption. Such models generally predict nonlinear effects due to large quasiparticle number densities and short recombination times.

U2 - 10.1063/1.357607

DO - 10.1063/1.357607

M3 - Article

SN - 0021-8979

VL - 76

SP - 2490

EP - 2493

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 4

ER -

Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV

Abstract

Access to Document

Fingerprint

Cite this