› › Optimization Of Hot Electron Bolometers For Thz Radiation

Optimization of Hot-Electron Bolometers for THz Radiation

Author : Axel Stockhausen

Publisher : KIT Scientific Publishing

Page : 152 pages

File Size : 36,66 MB

Release : 2014-07-20

Category : Technology & Engineering

ISBN : 3731500663

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Book Description

Hot-electron bolometers are fast and low noise radiation detectors which can be used for many different applications. The aim of this work was to optimize the fabrication process of hot-electron bolometers and gain a deeper understanding of the underlying processes. To achieve this, the fabrication of the superconducting thin films was optimized and the superconducting properties of the films were analyzed. Detectors fabricated using the results showed a record value for the noise temperature.



Retail Marketing

Author : Frank Quix

Publisher : Routledge

Page : 0 pages

File Size : 31,11 MB

Release : 2019-11-11

Category : Business & Economics

ISBN : 9781000035742

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Book Description

In today's turbulent business environment, maintaining and optimizing retail strategies are of crucial importance. Retail Marketing is a complete guide to how retailing works in the non-food sector. Focusing on operational applications of retailing, this textbook puts students on the inside track to success in the fast-moving retail industry. This new edition offers an integrated approah to internet and cross-channel retailing and adds new material on lost sales and market research in addition to coverig new research. Retail Marketing is a comprehensive textbook for students in this area and provides the perfect overview for anyone interested in this vital industry.



Ultra-fast YBa2Cu3O7-x Direct Detectors for the THz Frequency Range

Author : Petra Thoma

Publisher : KIT Scientific Publishing

Page : 192 pages

File Size : 36,70 MB

Release : 2014-07-28

Category : Science

ISBN : 3731500701

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Book Description

For the analysis and optimization of the picosecond pulsed terahertz radiation generated by electron storage rings or other pulsed sources, ultra-fast detectors are required which are able to resolve picosecond dynamic processes directly in the time domain. In this book, a new direct terahertz detector technology based on the high-temperature superconductor YBa2Cu3O7-x has been developed which opens new routes in the analysis of picosecond time-domain processes with a wide dynamic range.



Optimisation of hysteretic losses in high-temperature superconducting wires

Author : Krueger, Philipp

Publisher : KIT Scientific Publishing

Page : 245 pages

File Size : 27,63 MB

Release : 2014-05-15

Category : Science

ISBN : 3731501856

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Book Description

Hysteretic loss optimisations through numerical simulation and subsequent experimental confirmation in transport current and background field measurements: ferromagnetic shielding and topological geometry optimisation is used to reduce energy dissipation in HTS coated conductor geometries. Single tapes and coil geometries are investigated. A 3D model capable of taking into account contact resistances is also presented for the Twisted Stacked Tape Conductor cable.



Superconducting integrated THz receiver

Author : Merker, Michael

Publisher : KIT Scientific Publishing

Page : 230 pages

File Size : 23,44 MB

Release : 2019-12-17

Category : Technology & Engineering

ISBN : 3731509709

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Book Description



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

Author : Hofherr, Matthias

Publisher : KIT Scientific Publishing

Page : 216 pages

File Size : 22,92 MB

Release : 2014-09-26

Category : Technology & Engineering

ISBN : 3731502291

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Book Description

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.



Electrical-field sensitive YBa₂Cu₃O₇₋ₓ detectors for real-time monitoring of picosecond THz pulses

Author : Raasch, Juliane

Publisher : KIT Scientific Publishing

Page : 226 pages

File Size : 36,87 MB

Release : 2019-04-23

Category : Technology (General)

ISBN : 3731507862

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Book Description

This work investigates the capability of the high-temperature superconductor YBCO to sense the evolution of the electrical field of THz pulses. A deposition process for ten unit-cell thin films and a sub-μm patterning process were developed to enable high sensitivities. The detector response to THz exctiations and its electrical-field sensitivity were studied. This unique characteristic allows for the investigation of instabilities of the THz radiation emitted from synchrotron storage rings.



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

Author : Gyuráki, Roland

Publisher : KIT Scientific Publishing

Page : 194 pages

File Size : 34,27 MB

Release : 2022-02-24

Category : Science

ISBN : 3731510642

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Book Description

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.



Prospective Life Cycle Assessment of High-Temperature Superconductors for Future Grid Applications

Author : Buchholz, Alexander

Publisher : KIT Scientific Publishing

Page : 246 pages

File Size : 22,78 MB

Release : 2022-07-27

Category : Technology & Engineering

ISBN : 3731511940

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Book Description

High-temperature superconductors have distinct advantages compared to conventional conductors. Below their critical temperature, superconductors have immeasurably low ohmic losses. To maintain the superconducting state, superconductors require constant cooling. This study aims at identifying the environmental impacts of the application of superconductors in future grid technologies such as superconducting power cables.



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

Author : Godfrin, Aurélien

Publisher : KIT Scientific Publishing

Page : 146 pages

File Size : 41,88 MB

Release : 2022-05-10

Category : Technology & Engineering

ISBN : 3731510960

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Book Description

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.