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

Research output: Contribution to journalArticleScientificpeer-review

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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 languageEnglish
Pages (from-to)2490-2493
Number of pages4
JournalJournal of Applied Physics
Volume76
Issue number4
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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tunnel junctions
linearity
detectors
photons
photoabsorption
escape
energy
illumination
electrodes
silicon
thin films

Cite this

Rando, N., Peacock, A., Dordrecht, A. V., Hubnes, P., Videles, P., Salmi, J., & Suni, I. (1994). Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV. Journal of Applied Physics, 76(4), 2490-2493. https://doi.org/10.1063/1.357607
Rando, N. ; Peacock, A. ; Dordrecht, A. van ; Hubnes, P. ; Videles, P. ; Salmi, Jorma ; Suni, Ilkka. / Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV. In: Journal of Applied Physics. 1994 ; Vol. 76, No. 4. pp. 2490-2493.
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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.",
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Rando, N, Peacock, A, Dordrecht, AV, Hubnes, P, Videles, P, Salmi, J & Suni, I 1994, 'Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV', Journal of Applied Physics, vol. 76, no. 4, pp. 2490-2493. https://doi.org/10.1063/1.357607

Response linearity of Nb tunnel junction detectors for photon energies from 1,5 to 6,4 KeV. / Rando, N.; Peacock, A.; Dordrecht, A. van; Hubnes, P.; Videles, P.; Salmi, Jorma; Suni, Ilkka.

In: Journal of Applied Physics, Vol. 76, No. 4, 1994, p. 2490-2493.

Research output: Contribution to journalArticleScientificpeer-review

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 - Dordrecht, A. van

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

VL - 76

SP - 2490

EP - 2493

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

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