On the 9th of July the Department of Condensed Matter Physics (Laboratory “Radiation of charged particles”) of the Institute of Nanoengineering in Electronics, Spintronics and Photonics has held an International workshop “Coherent diffraction radiation in resonant conditions” with participation of leading scientists from KEK, Waseda University (Japan), the National Research Nuclear University MEPhI, and the Polytechnic University (Russia).
Participants discussed the results of joint research conducted in the framework of the joint Russian-Japanese project “Investigation of coherent diffraction radiation in resonant conditions for developing an intense monochromatic radiation source”.
The project is devoted to the study of resonance mechanisms of different nature: resonances in diffraction radiation conditioned by the periodicity of the structure; resonances conditioned by the modulated electron beam; effects conditioned by the plasmon resonance in individual elements of the lattice or a sharp increase in local fields in the system of interacting elements of the lattice. Special attention is paid to the case of double resonances arising at superposition and mutual amplification of a pair of resonances of different nature, which significantly increases the radiation intensity. These studies have an important applied aspect: the generation of high-power pulsed terahertz radiation based on compact accelerators.
Another important application area of the tasks, solved in the project, is the problem of detecting the properties of ultrashort electron bunches based on terahertz and x-ray radiation. This subject is in demand at a variety of accelerator-radiation complexes, starting from compact accelerators of relatively low energy at 20-100 MeV for practical applications in medicine, physics, nanotechnology, to mega installations like XFEL (DESY), LHC (CERN), future colliders such as CLIC, ILC.
The seminar discussed not only the theory, modeling and experimental results on the radiation of charged particles, but also promising schemes of supercompact acceleration based on the generation of intense wakefield fields, arising from the interaction of beams of charged particles with periodic structures.
The participants presented the results of current research and discussed plans for future joint research in this area, including experiments on the LUCX installation (KEK, Japan).
Professor Junji Urakawa works at KEK, Japan's largest research center, where they study high-energy physics and radiation of various kinds. His work is mainly related to nuclear physics: development and design of charged particle accelerators, experiments in the field of elementary particle physics, but a considerable part of efforts is devoted to the development of promising sources of terahertz and x-ray radiation. “My main goal is to invite universities to join us and attract young scientists for further development of new technologies. We have a long-standing cooperation with MEPhI, we have concluded an academic agreement”, said Professor Urakawa.
As a result of the seminar, it was agreed to extend the Cooperation agreement and conclude a new one at the level of heads of organizations. In addition, MEPhI, represented by the Laboratory staff, was invited to participate in joint projects within the framework of international grants, and the first discussions were held on the scientific objectives and the role of each party in the planned research.
