Low-Energy Response of Superconducting Tunnel Junction X-ray Spectrometers

Simon E. Labov; L. H. Hiller; C. A. Mears; Matthias Frank; H. Netel; F. Azgui; A. T. Barfknecht

doi:10.1109/77.403231

Low-Energy Response of Superconducting Tunnel Junction X-ray Spectrometers

Simon E. Labov, L. H. Hiller, C. A. Mears, Matthias Frank, H. Netel, F. Azgui, A. T. Barfknecht

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

15 Scopus citations

Abstract

Thin film structures incorporating metallic superconducting layers and tunnel junctions can be configured as low-energy X-ray spectrometers. We present results obtained when low-energy X-rays are absorbed in niobium films coupled to aluminum layers that serve as quasiparticle traps in an Nb/Al/Al2O3/Al/Nb tunnel junction X-ray detector. The linearity of the pulse height as a function of energy is discussed along with the energy dependence of the observed resolution and its relation to the broadening mechanisms. A resolution of 14 eV at 1 keV has been measured with our detector cooled to 03 K.

Original language	English (US)
Pages (from-to)	3034-3037
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	5
Issue number	2
DOIs	https://doi.org/10.1109/77.403231
State	Published - Jan 1 1995
Externally published	Yes

ASJC Scopus subject areas

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Physics and Astronomy (miscellaneous)

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abstract = "Thin film structures incorporating metallic superconducting layers and tunnel junctions can be configured as low-energy X-ray spectrometers. We present results obtained when low-energy X-rays are absorbed in niobium films coupled to aluminum layers that serve as quasiparticle traps in an Nb/Al/Al2O3/Al/Nb tunnel junction X-ray detector. The linearity of the pulse height as a function of energy is discussed along with the energy dependence of the observed resolution and its relation to the broadening mechanisms. A resolution of 14 eV at 1 keV has been measured with our detector cooled to 03 K.",

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AU - Labov, Simon E.

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AU - Mears, C. A.

AU - Frank, Matthias

AU - Netel, H.

AU - Azgui, F.

AU - Barfknecht, A. T.

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N2 - Thin film structures incorporating metallic superconducting layers and tunnel junctions can be configured as low-energy X-ray spectrometers. We present results obtained when low-energy X-rays are absorbed in niobium films coupled to aluminum layers that serve as quasiparticle traps in an Nb/Al/Al2O3/Al/Nb tunnel junction X-ray detector. The linearity of the pulse height as a function of energy is discussed along with the energy dependence of the observed resolution and its relation to the broadening mechanisms. A resolution of 14 eV at 1 keV has been measured with our detector cooled to 03 K.

AB - Thin film structures incorporating metallic superconducting layers and tunnel junctions can be configured as low-energy X-ray spectrometers. We present results obtained when low-energy X-rays are absorbed in niobium films coupled to aluminum layers that serve as quasiparticle traps in an Nb/Al/Al2O3/Al/Nb tunnel junction X-ray detector. The linearity of the pulse height as a function of energy is discussed along with the energy dependence of the observed resolution and its relation to the broadening mechanisms. A resolution of 14 eV at 1 keV has been measured with our detector cooled to 03 K.

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Low-Energy Response of Superconducting Tunnel Junction X-ray Spectrometers

Abstract

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