Generation and Application of High-Power Radiation Sources 2025

Dear Colleagues,

The uses of high-power radiation have gained attention rapidly in recent years due to its essential interaction with materials of different types. Recent progress in the generation of high-power radiation is now opening new prospects in various fields, including material science, biophysics, medical sciences, and industrial applications.

High-peak power radiation is important in various applications, especially in ultra-fast beam technology, which can be used to study basic science and ultra-fast dynamics of atoms and molecules. Radiation sources producing stable pulses with sufficiently high power are crucial for ultra-fast spectroscopy or material processing. Accelerator-based radiation sources in the forms of free-electron lasers (FELs) and coherent synchrotron/transition radiations from ultra-short electron beams are promising sources for generating high-peak power radiation with frequency tunable possibility. Depending on the undulator's electron beam energy and magnetic structure, FELs can produce high peak power radiation in the X-ray/UV/MIR/THz region. The coherent synchrotron and transition radiations are typically used to produce the radiation in the THz regime. Tabletop intense THz sources based on the femtosecond laser and photoconductive antennas, non-linear crystals, optical rectification sources, plasma-based THz sources, topological insulators, spintronic materials, and metasurfaces are also interesting sources for compact setup.

Among the high-power radiation applications, some do not require high-peak power radiation. Instead, they need high average-power radiation. An important example of such a radiation source is the synchrotron light source, produced from a high-energy and high-current electron beam. Synchrotron radiation has high intensity, high photon flux, and a wide range of wavelengths (from infrared to hard X-ray) with well-understood spectrum intensity. Another advantage is having several beamlines with different radiation wavelengths for different applications.

Research and development of high-power radiation sources using various techniques have been conducted worldwide.  The utilization of high-power radiation is widely spread with great application numbers. This Special Issue is a collaboration between Particles and the "16th Eco-Energy and Materials Science and Engineering Symposium: Special session on "Generation and Application of High-power Radiation Sources”. It is an attempt to summarize the research in the relevant areas for both the symposium attendees and other interested researchers. Original contributions of experimental work, computational work, or combinations of the two, or review papers, are highly welcome.

Prof. Dr. Hideaki Ohgaki
Guest Editor

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