Characterization of an Nb/Al/AlOx/Al/Nb superconducting tunnel junction detector with a very high spatial resolution in the soft X-ray range

Bechstein, S.; Beckhoff, Burkhard; Fliegauf, R.; Weser, J.; Ulm, G.

doi:10.1016/j.sab.2003.12.011

Cited by 20 publications

(13 citation statements)

References 14 publications

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“…The average and standard deviation are 10.2 and 1.7 eV, respectively. These intrinsic energy resolutions are almost the same as the best values for Nb-STJ array [3,5], and 2-3 times of the best values for single pixel STJ detectors reported up to now [7,8]. Thus, we have succeeded in realizing an STJ array detector with a large sensitive area and good energy resolution.…”

Section: Resultssupporting

confidence: 75%

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X-ray Detection Performance of 100-pixel Superconducting Tunnel Junction Array Detector in the Soft X-ray Region

et al. 2012

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The overall performance of a 100-pixel superconducting tunnel junction (STJ) array detector in the soft X-ray region was determined by measuring fluorescent X-rays from light elements. The yield of working STJs in the fabricated detector was 90%, and the leakage current for these 90 STJs was 11.6 ± 2.5 nA. The STJs had an intrinsic energy resolution for O-Kα X-rays (524.9 eV) of 10.2 ± 1.7 eV (FWHM). The deviation from energy linearity was −0.042 ± 0.45%, 0.793 ± 0.91%, and 0.135 ± 1.31% for O-Kα (524.9 eV), N-Kα (392.4 eV) and B-Kα (183.3 eV) Xrays, respectively. Most of the STJs exhibited uniform X-ray detection characteristics. In addition, the detector could discriminate the N-Kα peak in the fluorescent X-ray spectrum from n-type SiC doped with 300 ppm nitrogen.

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Section: Resultssupporting

confidence: 75%

“…The asymmetric electrode structure is effective Fig. 1 Microphotograph of single STJ pixel in 100-pixel array in reducing the double-peak response problem, which has been unavoidable in STJ detectors reported up to now [3,5].…”

Section: Methodsmentioning

confidence: 99%

X-ray Detection Performance of 100-pixel Superconducting Tunnel Junction Array Detector in the Soft X-ray Region

et al. 2012

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“…In contrast to Wavelength-Dispersive Systems (WDS), the most interesting features of superconducting energydispersive X-ray detectors are the broader energetic range that can be detected simultaneously and the higher solid angle of detection in particular when combined with a polycapillary optic [107]. However, most superconducting energy-dispersive X-ray detectors show relevant drawbacks with respect to practical applications in XRS such as line splitting, additional lines associated with contact and substrate events [96,107,108] and unstable energy scales, restricting them to only very few promising XRS applications (such as XAFS applications) in which a low intensity line, being energetically close to a high intensity line of a relevant matrix element, is of interest. In view of these relevant restrictions, PTB built a WDS based on a spherical grating and a CCD camera.…”

Section: Reviewmentioning

confidence: 99%

A quarter‐century of metrology using synchrotron radiation by PTB in Berlin

Beckhoff¹,

Gottwald²,

Klein³

et al. 2009

Physica Status Solidi (b)

131

114

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For more than 25 years, the Physikalisch‐Technische Bundesanstalt has been strongly engaged in the field of metrology using synchrotron radiation. In Berlin, this research programme started together with the user operation of the electron storage ring BESSY I in the early 1980s. At the beginning, the work was focused on fundamental radiometry, i.e. using the storage ring as a primary radiation source standard and operating beamlines for source and detector calibration in the vacuum ultraviolet spectral range. Meanwhile, at the electron storage rings BESSY II and Metrology Light Source in Berlin‐Adlershof, the activities have been extended to a broad range of fundamental and applied photon metrology in the range from the far infrared to hard X‐rays, including methods like cryogenic radiometry, reflectometry and X‐ray fluorescence spectroscopy. In the present review, we give a short historical introduction to this work, describe our laboratories and the basic radiometric principles, and present examples of recent applications, largely performed within the framework of scientific cooperations with external partners from industry and research. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…The 'typical' cryogenic detector describes the performance of a nine-pixel superconducting tunnel junction (STJ) spectrometer during routine operation at the synchrotron (Friedrich et al, 2001). The 'best' STJ combines achieved energy resolution (le Grand et al, 1998) and P/B ratios (Bechstein et al, 2004) with the efficiency and count-rate capabilities of a current 36-pixel upgrade. There is no unavoidable dead layer in STJ detectors.…”

Section: Science With Cryogenic Detectorsmentioning

confidence: 99%

Cryogenic X-ray detectors for synchrotron science

Friedrich

2006

J Synchrotron Rad

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Cryogenic detectors operated at temperatures below 1 K offer an order of magnitude higher energy resolution than conventional semiconductor-based energy-dispersive detectors, and orders of magnitude higher efficiency that grating spectrometers. Initially developed for astrophysics applications, these detectors are increasingly used in synchrotron-based research, both for detector characterization and for high-resolution X-ray spectroscopy. This article reviews current cryogenic detector technologies and their performance with respect to their use in synchrotron science. It also discusses areas of research that can benefit from improved energy resolution detectors, and outlines desirable detector developments in the context of novel science they would enable.

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Characterization of an Nb/Al/AlOx/Al/Nb superconducting tunnel junction detector with a very high spatial resolution in the soft X-ray range

Cited by 20 publications

References 14 publications

X-ray Detection Performance of 100-pixel Superconducting Tunnel Junction Array Detector in the Soft X-ray Region

X-ray Detection Performance of 100-pixel Superconducting Tunnel Junction Array Detector in the Soft X-ray Region

A quarter‐century of metrology using synchrotron radiation by PTB in Berlin

Cryogenic X-ray detectors for synchrotron science

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