Header

UZH-Logo

Maintenance Infos

Superconducting single X-ray photon detector based on $W_{0.8}Si_{0.2}$


Zhang, Xiaofu; Wang, Qiang; Schilling, Andreas (2016). Superconducting single X-ray photon detector based on $W_{0.8}Si_{0.2}$. AIP Advances, 6(11):115104.

Abstract

We fabricated a superconducting single X-ray photon detector based on $W_{0.8}Si_{0.2}$, and we characterized its basic detection performance for keV-photons at different temperatures. The detector has a critical temperature of 4.97 K, and it is able to be operated up to 4.8 K, just below the critical temperature. The detector starts to react to X-ray photons at relatively low bias currents, less than 1% of Ic at T = 1.8 K, and it shows a saturated count rate dependence on bias current at all temperatures, indicating that the optimum internal quantum efficiency can always be reached. Dark counts are negligible up to the highest investigated bias currents (99% of Ic) and operating temperature (4.8 K). The latching effect affects the detector performance at all temperatures due to the fast recovery of the bias current; however, further modifications of the device geometry are expected to reduce the tendency for latching.

Abstract

We fabricated a superconducting single X-ray photon detector based on $W_{0.8}Si_{0.2}$, and we characterized its basic detection performance for keV-photons at different temperatures. The detector has a critical temperature of 4.97 K, and it is able to be operated up to 4.8 K, just below the critical temperature. The detector starts to react to X-ray photons at relatively low bias currents, less than 1% of Ic at T = 1.8 K, and it shows a saturated count rate dependence on bias current at all temperatures, indicating that the optimum internal quantum efficiency can always be reached. Dark counts are negligible up to the highest investigated bias currents (99% of Ic) and operating temperature (4.8 K). The latching effect affects the detector performance at all temperatures due to the fast recovery of the bias current; however, further modifications of the device geometry are expected to reduce the tendency for latching.

Statistics

Citations

Dimensions.ai Metrics

Altmetrics

Downloads

17 downloads since deposited on 11 Jan 2017
7 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2016
Deposited On:11 Jan 2017 17:36
Last Modified:02 Feb 2018 11:20
Publisher:American Institute of Physics
ISSN:2158-3226
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1063/1.4967278

Download

Download PDF  'Superconducting single X-ray photon detector based on $W_{0.8}Si_{0.2}$'.
Preview
Content: Accepted Version
Filetype: PDF
Size: 450kB
View at publisher
Download PDF  'Superconducting single X-ray photon detector based on $W_{0.8}Si_{0.2}$'.
Preview
Content: Published Version
Filetype: PDF
Size: 1MB
Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)