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Imaging spectroscopy with Ta/Al DROIDs: Performance for different Al trapping layer thicknesses

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Imaging spectroscopy with Ta/Al DROIDs: Performance for different Al trapping layer thicknesses. / Hijmering, R. A.; Verhoeve, P.; Martin, D. D. E. et al.
In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 559, No. 2, 04.2006, p. 689-691.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Hijmering, RA, Verhoeve, P, Martin, DDE, Peacock, A & Kozorezov, AG 2006, 'Imaging spectroscopy with Ta/Al DROIDs: Performance for different Al trapping layer thicknesses', Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 559, no. 2, pp. 689-691. https://doi.org/10.1016/j.nima.2005.12.105

APA

Hijmering, R. A., Verhoeve, P., Martin, D. D. E., Peacock, A., & Kozorezov, A. G. (2006). Imaging spectroscopy with Ta/Al DROIDs: Performance for different Al trapping layer thicknesses. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 559(2), 689-691. https://doi.org/10.1016/j.nima.2005.12.105

Vancouver

Hijmering RA, Verhoeve P, Martin DDE, Peacock A, Kozorezov AG. Imaging spectroscopy with Ta/Al DROIDs: Performance for different Al trapping layer thicknesses. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2006 Apr;559(2):689-691. doi: 10.1016/j.nima.2005.12.105

Author

Hijmering, R. A. ; Verhoeve, P. ; Martin, D. D. E. et al. / Imaging spectroscopy with Ta/Al DROIDs: Performance for different Al trapping layer thicknesses. In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2006 ; Vol. 559, No. 2. pp. 689-691.

Bibtex

@article{a558b0396fc8430996706d8ffd894d27,
title = "Imaging spectroscopy with Ta/Al DROIDs: Performance for different Al trapping layer thicknesses",
abstract = "To overcome the limited field of view, which can be achieved with single superconducting tunneling junction (STJ) arrays, distributed read-out imaging devices (DROIDs) are being developed. DROIDs consist of a superconducting absorber strip with proximized STJs on either end. The ratio of the two signals from the STJs provides information on the absorption position, and the sum signal is a measure for the energy of the absorbed photon. In our devices, the absorber is an epitaxial Ta strip that extends underneath the Ta/Al read-out STJs. Thus, the bottom electrode of the STJs is an integral part of the absorber. Due to the proximity effect, the STJs have a lower energy gap than the absorber, causing trapping of quasiparticles (QPs) in the STJs. The trapping will change with thicker Al layers because the energy gap of the devices will decrease. A series of 50×200 μm2 and 20×200 μm2 absorbers (including 50×50 μm2 STJs) and different Al trapping layer thicknesses, ranging from 65 to 130 nm, have been tested. The devices have been illuminated with 6 keV 55Fe photons. The position resolution is found to improve with increasing Al thickness. It is found that the current model needs to be adapted for DROIDs to account for different injection of QPs into the STJ and extra losses to the absorber.",
keywords = "Superconducting tunnel junction, Proximity effect",
author = "Hijmering, {R. A.} and P. Verhoeve and Martin, {D. D. E.} and A. Peacock and Kozorezov, {A. G.}",
year = "2006",
month = apr,
doi = "10.1016/j.nima.2005.12.105",
language = "English",
volume = "559",
pages = "689--691",
journal = "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
publisher = "ELSEVIER SCIENCE BV",
number = "2",

}

RIS

TY - JOUR

T1 - Imaging spectroscopy with Ta/Al DROIDs: Performance for different Al trapping layer thicknesses

AU - Hijmering, R. A.

AU - Verhoeve, P.

AU - Martin, D. D. E.

AU - Peacock, A.

AU - Kozorezov, A. G.

PY - 2006/4

Y1 - 2006/4

N2 - To overcome the limited field of view, which can be achieved with single superconducting tunneling junction (STJ) arrays, distributed read-out imaging devices (DROIDs) are being developed. DROIDs consist of a superconducting absorber strip with proximized STJs on either end. The ratio of the two signals from the STJs provides information on the absorption position, and the sum signal is a measure for the energy of the absorbed photon. In our devices, the absorber is an epitaxial Ta strip that extends underneath the Ta/Al read-out STJs. Thus, the bottom electrode of the STJs is an integral part of the absorber. Due to the proximity effect, the STJs have a lower energy gap than the absorber, causing trapping of quasiparticles (QPs) in the STJs. The trapping will change with thicker Al layers because the energy gap of the devices will decrease. A series of 50×200 μm2 and 20×200 μm2 absorbers (including 50×50 μm2 STJs) and different Al trapping layer thicknesses, ranging from 65 to 130 nm, have been tested. The devices have been illuminated with 6 keV 55Fe photons. The position resolution is found to improve with increasing Al thickness. It is found that the current model needs to be adapted for DROIDs to account for different injection of QPs into the STJ and extra losses to the absorber.

AB - To overcome the limited field of view, which can be achieved with single superconducting tunneling junction (STJ) arrays, distributed read-out imaging devices (DROIDs) are being developed. DROIDs consist of a superconducting absorber strip with proximized STJs on either end. The ratio of the two signals from the STJs provides information on the absorption position, and the sum signal is a measure for the energy of the absorbed photon. In our devices, the absorber is an epitaxial Ta strip that extends underneath the Ta/Al read-out STJs. Thus, the bottom electrode of the STJs is an integral part of the absorber. Due to the proximity effect, the STJs have a lower energy gap than the absorber, causing trapping of quasiparticles (QPs) in the STJs. The trapping will change with thicker Al layers because the energy gap of the devices will decrease. A series of 50×200 μm2 and 20×200 μm2 absorbers (including 50×50 μm2 STJs) and different Al trapping layer thicknesses, ranging from 65 to 130 nm, have been tested. The devices have been illuminated with 6 keV 55Fe photons. The position resolution is found to improve with increasing Al thickness. It is found that the current model needs to be adapted for DROIDs to account for different injection of QPs into the STJ and extra losses to the absorber.

KW - Superconducting tunnel junction

KW - Proximity effect

U2 - 10.1016/j.nima.2005.12.105

DO - 10.1016/j.nima.2005.12.105

M3 - Journal article

VL - 559

SP - 689

EP - 691

JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 2

ER -