Fundamental research in 2006

- A mockup of volume free electron laser (VFEL-250) was built in 3-cm wavelength range. Radiation in the range of 8,3-8,6 GHz was generated with ~10 kW output in grid resonator having variable number of threads in perpendicular cross-section. Energy of electron beam lied in the range 200-250 keV. Experimental study of parameters was made, that allow tuning of frequency in VFEL for electron energies of 200-250 keV and magnetic field magnitude 1,1-1,7 T.

- An effective method of deflection of fast charged particles by bent crystals was developed for study of possibility of LHC beam halo cleaning at the stage of luminosity upgrade.

- A theory was developed which describes the accretion of relativistic cosmological plasma on primordial black holes, that are predicted by theories with additional spatial dimension. New, essentially more strict constraints were found on initial mass PBH fraction in theories with additional spatial dimension (compared with previously existing). These constraints are based on the data of measurement of intensity of diffusion cosmic gamma background, excess of antiprotons and also on the data of primordial nucleosynthesis and residual ionisation of hydrogen.

- A method of manufacturing of monomolecular source of coherent radiation in terahertz wavelength range was proposed for the first time (monomolecular running wave lamp, free electron nanolaser) based on Cherenkov and oscillatory mechanism of development of radiative instability. Development of such sources will lead to their use as basic elements of nanoelectronics, and also lets locally irradiate micro- and nano-objects which are studied and processed.

- A theory of scattering of quantum light by a single quantum dot was developed. It takes into account effects of local field. Amplitude of forward scattering was calculated. It was shown that this amplitude is an operatorin the space of quantum states of light, which means that quantum statistics of light is transformed during its interaction with quantum dot. Specifically, physical amplitudes of scattering for coherent and incoherent components of light are different. These results open an opportunity to implement of essentially new quantum oplical applicanies and devices based on nanostructured artificial materials.