1998
DOI: 10.1107/s0909049597014465
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Cryogenic high-resolution X-ray spectrometers for SR-XRF and microanalysis

Abstract: Experimental results are presented obtained with a cryogenically cooled high-resolution X-ray spectrometer based on a 141 Â 141 mm Nb-Al-Al 2 O 3 -Al-Nb superconducting tunnel junction (STJ) detector in an SR-XRF demonstration experiment. STJ detectors can operate at count rates approaching those of semiconductor detectors while still providing a signi®cantly better energy resolution for soft X-rays. By measuring¯uorescence X-rays from samples containing transition metals and low-Z elements, an FWHM energy res… Show more

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Cited by 12 publications
(5 citation statements)
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“…Fortunately, photolithographic device fabrication and a preamplifier with an off-the-shelf field effect transistor (FET) input stage allow easy scaling to multi-element arrays. For details of the experimental setup see Frank et al (1998a). One concern for the operation of detector arrays is device uniformity.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Fortunately, photolithographic device fabrication and a preamplifier with an off-the-shelf field effect transistor (FET) input stage allow easy scaling to multi-element arrays. For details of the experimental setup see Frank et al (1998a). One concern for the operation of detector arrays is device uniformity.…”
Section: Resultsmentioning
confidence: 99%
“…The detector development was initially driven by X-ray and particle astrophysics (Kraus et al, 1989;McCammon et al, 1993). More recently, applications in microanalysis (Wollman et al, 1997), material science (Frank et al, 1998a), and biophysics (Benner et al, 1997;Friedrich et al, 1999) have emerged and are being pursued for scientific and commercial interest.…”
Section: Introductionmentioning
confidence: 99%
“…We have developed superconducting Nb-Al-AlOx-Al-Nb EUV and X-ray detectors for high-resolution spectroscopy in astrophysics, material science and biophysics [8], [9]. They consist of a 265 nm bottom Nb film and a 50 nm bottom Al trap, which is oxidized to form a thin AlOx tunneling barrier, a top 50 nm Al trap and a 165 nm Nb absorber film.…”
Section: A Experimental Setupmentioning
confidence: 99%
“…A conventional STJ has a layered structure consisting of two superconducting layers separated by a tunneling barrier [5], [6]. A particle (or an X-ray photon) absorbed in one of the electrodes breaks Cooper pairs and thereby generates excess charge carriers in proportion to its energy.…”
Section: Introductionmentioning
confidence: 99%