Speaker
Description
The processes of interaction of charged particles in crystals at channeling are well studied today. Based on the physics of channeling in crystals, new methods are being developed for controlling beams of both charged and neutral particles. However, in addition to the innovative tool of controlling particle beams through channeling, it is well known that the effect of channeling of charged particles in crystals can be used to generate electromagnetic radiation in the X-ray and gamma ranges. The field gradients of the crystallographic axes and planes are very large, far exceeding the values that can be obtained by all known physical instruments, which allows us to conclude that crystalline undulators can be the most powerful sources of electromagnetic radiation (channeling radiation). In fact, in order to create a powerful source of radiation based on the channeling effect, there is one essential problem associated with the fast dechanneling of a beam of charged particles due to inelastic scattering processes. In the case of negatively charged particles, in particular electrons, the problem is even more pronounced, since most of the time the beam is in close proximity to the crystal nuclei.
This problem is absent when electrons interact with the field of an optical lattice (OL) in the channeling mode. The interaction of a charged particle with the field of a laser wave is considered to be free from inelastic scattering.
We have been studying the channeling of electrons in OLs for a relatively long time, both in relation to the beam dynamics and in relation to the radiation during channeling in the OL field, which will be the subject of this report. Our latest results describe the coherent emission of an electron beam when channeled in an OL. In particular, it is shown that, under certain conditions, the radiation maximum during channeling of an electron beam in OL will coincide with the frequency of the field forming the OL. This effect can underlie a new method for increasing the intensity of laser radiation that forms the OL field.
