Influence of Material and Geometry on the Performance of Superconducting Nanowire Single-Photon Detectors
Influence of Material and Geometry on the Performance of Superconducting Nanowire Single-Photon Detectors

Author: Henrich, Dagmar

Publisher: KIT Scientific Publishing

Published: 2014-07-28

Total Pages: 204

ISBN-13: 3731500922

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Superconducting Nanowire Single-Photon Detectors offer the capability to detect electromagnetic waves on a single photon level in a wavelength range that far exceeds that of alternative detector types. However, above a certain threshold wavelength, the efficiency of those detectors decreases stronlgy, leading to a poor performance in the far-infrared range. Influences on this threshold are studied and approaches for improvement are verified experimentally by measurement of the device performance.

Influence of Material and Geometry on the Performance of Superconducting Nanowire Single-Photon Detectors
Influence of Material and Geometry on the Performance of Superconducting Nanowire Single-Photon Detectors

Author: Dagmar Henrich

Publisher:

Published: 2013

Total Pages: 0

ISBN-13: 9781000036268

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This work addresses potentially occurring unintended flows of personally identifiable information (PII) within two fields of research, i.e., enterprise identity management and online social networks. For that, we investigate which pieces of PII can how often be gathered, correlated, or even be inferred by third parties that are not intended to get access to the specific pieces of PII. Furthermore, we introduce technical measures and concepts to avoid unintended flows of PII.

Real-time imaging systems for superconducting nanowire single-photon detector arrays
Real-time imaging systems for superconducting nanowire single-photon detector arrays

Author: Hofherr, Matthias

Publisher: KIT Scientific Publishing

Published: 2014-09-26

Total Pages: 216

ISBN-13: 3731502291

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Superconducting nanowire singe-photon detectors (SNSPD) are promising detectors in the field of applications, where single-photon resolution is required like in quantum optics, spectroscopy or astronomy. These cryogenic detectors gain from a broad spectrum in the optical and infrared range and deliver low dark count rates and low jitter times. This thesis improves the understanding of the detection mechanism of SNSPDs and intodruces new and promising multi-pixel readout concepts.

Technology and readout for scaling up superconducting nanowire single-photon detectors
Technology and readout for scaling up superconducting nanowire single-photon detectors

Author: Knehr, Emanuel Marius

Publisher: KIT Scientific Publishing

Published: 2023-03-02

Total Pages: 200

ISBN-13: 3731512564

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This work presents three advances to scale SNSPDs from few-pixel devices to large detector arrays: atomic layer deposition for the fabrication of uniform superconducting niobium nitride films of few-nanometer thickness, a frequency-multiplexing scheme to operate multiple detectors with a reduced number of lines, and the integration of SNSPDs with free-form polymer structures to achieve efficient optical coupling onto the active area of the detectors.

Improving the Spectral Bandwidth of Superconducting Nanowire Single-Photon Detectors (SNSPDs)
Improving the Spectral Bandwidth of Superconducting Nanowire Single-Photon Detectors (SNSPDs)

Author: Charaev, Ilya

Publisher: KIT Scientific Publishing

Published: 2018-07-31

Total Pages: 176

ISBN-13: 3731507455

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This work presents a comprehensive investigation of the influence of geometry-dependent factors on performance metrics of superconducting single-photon detectors. With fundamental knowledge, main investigations are focused to extend the spectral bandwidth and to enhance the detection efficiency, especially in infrared range. The developed technology of single-spiral detectors and unconventional electron-beam lithography allows to improve the performance of superconducting detectors.

Self-rolled Micro- and Nanoarchitectures
Self-rolled Micro- and Nanoarchitectures

Author: Vladimir M. Fomin

Publisher: Walter de Gruyter GmbH & Co KG

Published: 2020-11-09

Total Pages: 206

ISBN-13: 3110574233

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The work shows the fascination of topology- and geometry-governed properties of self-rolled micro- and nanoarchitectures. The author provides an in-depth representation of the advanced theoretical and numerical models for analyzing key effects, which underlie engineering of transport, superconducting and optical properties of micro- and nanoarchitectures.

Fluorescent thermal imaging method for investigating transient effects in high-temperature superconductor tapes and coils
Fluorescent thermal imaging method for investigating transient effects in high-temperature superconductor tapes and coils

Author: Gyuráki, Roland

Publisher: KIT Scientific Publishing

Published: 2022-02-24

Total Pages: 194

ISBN-13: 3731510642

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This work presents the development and application of high-speed fluorescent thermal imaging for quench analysis in high-temperature superconductors (HTS). Using a fluorescent coating, with a temperature-dependent light emission, temperature changes can be calculated over 2D surfaces. The technique uncovered peculiar transient effects in novel HTS tape architectures and also helped to verify and better understand hot spot development in both insulated and non-insulated, HTS–wound pancake coils.

AC Losses in High-Temperature Superconductor Tapes and Cables for Power Applications
AC Losses in High-Temperature Superconductor Tapes and Cables for Power Applications

Author: Godfrin, Aurélien

Publisher: KIT Scientific Publishing

Published: 2022-05-10

Total Pages: 146

ISBN-13: 3731510960

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This work focuses on two topics. The first is the investigation of producing filaments on copper-stabilized coated conductors, with striations made after or before electroplating the tape. The second topic is the applicability of the striations for reducing the AC losses of cables, in particular the CORC® and RACC cables, which are made with high-temperature superconductor (HTS) striated tapes.

Development of high-temperature superconductor cables for high direct current applications
Development of high-temperature superconductor cables for high direct current applications

Author: Preuß, Alan

Publisher: KIT Scientific Publishing

Published: 2021-01-14

Total Pages: 194

ISBN-13: 3731510413

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A design process for HTS DC cables was developed for high current applications. Based on the design process, a 35 kA HTS DC cable demonstrator was developed. The superconducting elements of the demonstrator were manufactured and tested individually at 77 K. Afterwards, the demonstrator cable was assembled and tested at 77 K. The assembled demonstrator successfully reached 35 kA at 77 K and self field conditions.