Analysis of pulse shape from a high-resolution superconducting tunnel junction X-ray spectrometer

Mears, C. A.; Labov, S. E.; Frank, Matthias; Lindeman, M. A.; Hiller, L. J.; Netel, H.; Barfknecht, A.T.

doi:10.1016/0168-9002(95)01047-5

Cited by 60 publications

(17 citation statements)

References 9 publications

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“…[As an aside, we note that Nb-based STJs exhibit the opposite behavior, with signal decay times increasing with increasing bias [8] because quasiparticle life times are much shorter in Nb than in Al.] The different life times in the two layers are evident in the signal at high bias.…”

Section: Time Scales In Ta-stjsmentioning

confidence: 98%

“…For applications where a clean Gaussian response function is needed (which is not always the case at the synchrotron) it is important that the rise times of events from the top Ta electrode are shorter than those form the bottom electrode, because the rise time differences allow vetoing bottom-layer events to remove the line-splitting artifact they cause [8]. The differences are due to the proximitized fraction of the Ta film being (relatively) larger in the 165 nm top than in the 265 nm bottom Ta film, so that quasiparticles are trapped more efficiently.…”

Section: Time Scales In Ta-stjsmentioning

confidence: 99%

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New Developments in Superconducting Tunnel Junction X-Ray Spectrometers for Synchrotron Science

et al. 2012

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We are developing Ta-based superconducting tunnel junction (STJ) X-ray detectors for high-resolution soft X-ray spectroscopy at the synchrotron. For scaling to large detector arrays, we have also built a compact, low-cost, remote-controllable preamplifier with <3 eV electronic noise. Current Ta-STJs attain an energy resolution between 6.5 and 9 eV FWHM for energies up to ∼2 keV, and can be operated at rates up to ∼5,000 counts/s as long as the signals decay with a single exponential time constant.

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Section: Time Scales In Ta-stjsmentioning

confidence: 98%

Section: Time Scales In Ta-stjsmentioning

confidence: 99%

New Developments in Superconducting Tunnel Junction X-Ray Spectrometers for Synchrotron Science

et al. 2012

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“…The energy resolution of such detectors, typically operating at temperatures below $1 K, can be at least an order of magnitude better than for conventional ionizationbased semiconductor detectors such as SiLi or Ge detectors. Among the best reported photon energy resolutions achieved with STJ detectors are 29 eV (FWHM) at 6 keV (Mears et al, 1996), 12.5 eV at 1 keV and 1.3 eV at 3.5 eV (Peacock et al, 1996). Compared with other types of cryogenic detectors, STJ detectors can count at high count rates of several 10 000 counts s À1 because of their relatively fast ($ms) pulse decay times.…”

Section: Introductionmentioning

confidence: 99%

Cryogenic high-resolution X-ray spectrometers for SR-XRF and microanalysis

Frank

Mears

Labov

et al. 1998

J Synchrotron Radiat

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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 resolution of 6±15 eV for X-rays in the energy range 180±1100 eV has been obtained. The results show that, in the near future, STJ detectors may prove very useful in XRF and microanalysis applications.

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“…These applications include the cooling of x-ray microcalorimeters used in microanalysis 5 for the semiconductor industry and for cooling superconducting tunnel junctions 6,7 and transition edge sensors used in heavy particle detection 8 for studying biological samples and DNA sequencing. The project objectives are summarized, the cryostat and two-stage ADR design and performance are reviewed, and future plans for this type of system are discussed.…”

Section: Introductionmentioning

confidence: 99%

A Long Lifetime Balloon-Borne Cryostat and Magnetic Refrigerator

Gundersen

Jirmanus

Timbie

et al. 2000

Advances in Cryogenic Engineering

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A long lifetime, low cost, vapor-shielded liquid neon and liquid helium cryostat and an adiabatic demagnetization refrigerator have been developed for cooling a bolometric radiometer to 0.1 K for mm and sub-mm observations of the cosmic microwave background. This is the first phase of a development effort for a very long hold time system for use in NASA's 100 Day Ultra Long Duration Balloon Project. This type of system has additional applications in sub-orbital and ground-based research in millimeter, submillimeter, infrared, and x-ray astrophysics. A detailed description of the design, analysis, and performance of the system is presented and plans for follow-up design improvements are discussed.

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Analysis of pulse shape from a high-resolution superconducting tunnel junction X-ray spectrometer

Cited by 60 publications

References 9 publications

New Developments in Superconducting Tunnel Junction X-Ray Spectrometers for Synchrotron Science

New Developments in Superconducting Tunnel Junction X-Ray Spectrometers for Synchrotron Science

Cryogenic high-resolution X-ray spectrometers for SR-XRF and microanalysis

A Long Lifetime Balloon-Borne Cryostat and Magnetic Refrigerator

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