Investigation of Fretting Wear of Cladding Materials in Liquid Lead
Investigation of Fretting Wear of Cladding Materials in Liquid Lead

Author: Mattia Del Giacco

Publisher: KIT Scientific Publishing

Published: 2014-07-31

Total Pages: 270

ISBN-13: 3866449607

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One promising concept for future nuclear reactors uses liquid metals like Pb as reactor coolant. In this work, fretting of fuel clad materials is investigated in Pb environment at relevant operating conditions. A novel test apparatus is presented that allows fretting tests in liquid lead with high accuracy and reproducibility also during long term tests. Tolerable operating conditions concerning fretting wear by evaluating the specific wear coefficient and the concept of fretting maps are given.

Advances in Materials Science for Environmental and Energy Technologies V
Advances in Materials Science for Environmental and Energy Technologies V

Author: Tatsuki Ohji

Publisher: John Wiley & Sons

Published: 2016-09-06

Total Pages: 254

ISBN-13: 1119323614

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This proceedings volume contains a collection of 20 papers from the following symposia held during the 2015 Materials Science and Technology (MS&T '15) meeting: 7th International Symposium on Green and Sustainable Technologies for Materials Manufacturing Processing Materials for Nuclear Applications and Extreme Environments Materials Issues in Nuclear Waste Management in the 21st Century Nanotechnology for Energy, Healthcare and Industry Materials for Processes for CO2 Capture, Conversion and Sequestration Hybrid Organic – Inorganic Materials for Alternative Energy

Design and Experimental Investigation of a Second Harmonic 20 kW Class 28 GHz Gyrotron for Evaluation of New Emitter Technologies
Design and Experimental Investigation of a Second Harmonic 20 kW Class 28 GHz Gyrotron for Evaluation of New Emitter Technologies

Author: Malygin, Anton

Publisher: KIT Scientific Publishing

Published: 2016-12-16

Total Pages: 162

ISBN-13: 3731505843

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Gyrotrons are high-power mm-wave tubes. Here, the design, construction and experimental investigation of a 20 kW, 28 GHz gyrotron (2nd harmonic) are reported. This tube was designed to evaluate new emitters for future highly efficient and reliable fusion gyrotrons and for material processing applications. Following experimental results have been achieved in CW operation: 22.5 kW output power at 23.4 kV electron beam voltage and 2.23 A beam current with the world record efficiency of 43 %.

Systematic Study of Key Components for a Coaxial-Cavity Gyrotron for DEMO
Systematic Study of Key Components for a Coaxial-Cavity Gyrotron for DEMO

Author: Franck, Joachim

Publisher: KIT Scientific Publishing

Published: 2017-05-11

Total Pages: 274

ISBN-13: 3731506521

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The physical design of cavity and magnetron injection gun (MIG) for a realistic, DEMO-compatible, coaxial-cavity 238 GHz 2 MW CW fusion gyrotron is developed in this work, having auxiliary frequencies at 170 GHz and 204 GHz. Novel systematic approaches towards multi-frequency mode selection, magnet requirements, and MIG design are presented. Mode deterioration and voltage depression variation due to insert misalignment versus cavity wall and/or versus electron beam are studied.

Investigation of Fretting Wear of Cladding Materials in Liquid Lead
Investigation of Fretting Wear of Cladding Materials in Liquid Lead

Author:

Publisher:

Published: 2013

Total Pages: 0

ISBN-13: 9781000031942

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One promising concept for future nuclear reactors uses liquid metals like Pb as reactor coolant. In this work, fretting of fuel clad materials is investigated in Pb environment at relevant operating conditions. A novel test apparatus is presented that allows fretting tests in liquid lead with high accuracy and reproducibility also during long term tests. Tolerable operating conditions concerning fretting wear by evaluating the specific wear coefficient and the concept of fretting maps are given.

Temperature- and Time-Dependent Dielectric Measurements and Modelling on Curing of Polymer Composites
Temperature- and Time-Dependent Dielectric Measurements and Modelling on Curing of Polymer Composites

Author: Prastiyanto, Dhidik

Publisher: KIT Scientific Publishing

Published: 2016-03-15

Total Pages: 204

ISBN-13: 3731504243

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In this book a test set for dielectric measurements at 2.45 GHz during curing of polymer composites is developed. Fast reconstruction is solved using a neural network algorithm. Modeling of the curing process at 2.45 GHz using both dielectric constant and dielectric loss factor results in more accurate model compared to low frequency modelling that only uses the loss factor. Effect of various hardeners and different amount of filler is investigated.

The CERN Resonant WISP Search (CROWS)
The CERN Resonant WISP Search (CROWS)

Author: Betz, Michael

Publisher: KIT Scientific Publishing

Published: 2014-05-05

Total Pages: 212

ISBN-13: 3731501996

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The subject of this work is the design, implementation and first results of the "CERN Resonant WISP Search" (CROWS), which probes the existence of Axion Like Particles and Hidden Sector Photons (HSPs) using microwave techniques. By exploiting low loss cavity resonators, multiple layers of electromagnetic shielding and a micro-Hz bandwidth detection scheme, new exclusion limits could be set. For HSPs, sensitivity was improved by a factor of 7 compared to previous laboratory experiments.

Energy-efficient, scalable and modular industrial microwave applicator for high temperature alkaline hydrolysis of PET
Energy-efficient, scalable and modular industrial microwave applicator for high temperature alkaline hydrolysis of PET

Author: Ramopoulos, Vasileios

Publisher: KIT Scientific Publishing

Published: 2023-01-27

Total Pages: 162

ISBN-13: 3731510995

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Microwave-assisted alkaline hydrolysis of PET can be 20 times faster and at lower temperatures. This work presents a novel industrial microwave applicator at 2.45 GHz with homogeneous distribution to support this reaction, which allows an efficient and continuous operation. In addition, an innovative dielectric and calorimetric measurements setup is presented. Furthermore, the modelling of the reaction kinetics based on the measured dielectric parameters is presented.