Accès ouvert
2025
article
OpenAlex
Lea Marti, Ioannis Gr. Pagonakis, Chieh-Lin Chiang, Chuanren Wu et autres
Efficiency is a key factor for high-power gyrotrons, particularly in future fusion power plants, where a large number of gyrotron units will be required for plasma heating. A single-stage depressed collector enhances efficiency from approximately 35% to 50% by applying a decelerating …
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Accès ouvert
2025
article
OpenAlex
Marthe Millen, Ioannis Gr. Pagonakis, J. Genoud, Lea Marti et autres
Gyrotrons are high-power microwave sources, readily applied in diverse fields ranging from fusion research and thermal treatment of materials to advanced spectroscopic techniques. Here, we provide the cavity design of a 198 GHz gyrotron to generate microwaves with kW level power and …
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2025
conference-paper
OpenAlex
Ioannis Gr. Pagonakis, D. Ackermann, Nicholas Alaniva, Snaedís Björgvinsdóttir et autres
Over recent years, significant efforts have been undertaken at ETH Zürich (ETHZ) to advance gyrotron development. This presentation will highlight the key achievements of these efforts, encompassing theoretical insights, design advancements, and technological developments.
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Accès ouvert
2024
article
OpenAlex
Lea Marti, Ioannis Gr. Pagonakis, Leif Sieben, Marthe Millen et autres
A model is presented for simulating the electron beam within the entire gyrotron geometry using an electron optics code. The model incorporates the influence of the electromagnetic fields generated by the cavity's operational mode through a simple self-consistent approach. This simulation method …
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Accès ouvert
2024
article
OpenAlex
Sarah A. Overall, Sina J. Hartmann, Quang H. Luu-Nguyen, Patrick Judge et autres
High Resolution Image Download MS PowerPoint Slide Phorbol ester analogs are a promising class of anticancer therapeutics and HIV latency reversing agents that interact with cellular membranes to recruit and activate protein kinase C (PKC) isoforms. However, it is unclear how these …
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2024
conference-paper
OpenAlex
Lea Marti, Ioannis Gr. Pagonakis, Leif Sieben, J. Genoud et autres
The ionization of the residual gas in gyrotrons causes the generation of positively charged ions and negatively charged electrons. Using the electron optics code Ariadne, it was possible to simulate the behavior of these electrons in the overall gyrotron geometry in the …
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Accès ouvert
2023
article
OpenAlex
Lea Marti, Nergiz Şahin Solmaz, Michal Kern, Reza Farsi et autres
Higher magic angle spinning (MAS) frequencies than currently available are desirable to improve spectral resolution in NMR and EPR systems. While conventional strategies employ pneumatic spinning limited by fluid dynamics, this paper demonstrates the development of an optical spinning technique in which …
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