Search academic texts

Information × Registration Number 0223U000571, 0121U109039 , R & D reports Title Experimental study of new methods of generation intensive microwave and acceleration of charged particles, based on the excitation of plasma, dielectric and photonic structure by electron bunches, laser pulses or external sources of electromagnetic radiation popup.stage_title Head Sotnikov Hennadii V., д.ф.-м.н. Registration Date 12-01-2023 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 A five-zone two-channel dielectric wake structure was developed and manufactured. The dielectric structure based on the metal waveguide R26 and quartz plates provides a transformation factor of ~8 and a longitudinal electric field strength of ~40 V/cm for the case of the single drive bunch. Diagnostic equipment has been prepared for the study of the transformation coefficient in this accelerating structure. Two magnetic analyzers will be used to measure the energy losses of electron bunches, the first at the entrance to the dielectric structure, the second at its exit. To measure the longitudinal wake field in the accelerating channel, a probe was developed and its calibration was carried out. If the output signal from the probe is 1 mV, the electric field at the measurement point will be 2.6 V/m, and the microwave power density is 26 mW/m2. The output interdependencies of the phase dispersion of different orders of elements and blocks of the "stretcher-optical amplifier-compressor" system were found, and conclusions were drawn about the possibility of compensating the phase dispersion of this system of different orders by matching the parameters of the stretcher and compressor depending on the variant of the construction of the optical amplifier. It is analytically and numerically shown that the dependence of the rate of acceleration of charged particles by a surface wave, which occurs when a plane wave falls on the boundary of two media, on their initial energy has a maximum, for ultrarelativistic particles the rate of acceleration tends to zero. By means of full PIC modeling, a comparison of the rates of acceleration of electron bunches by a laser pulse in a dielectric laser accelerator using flat dielectric and garting (chip) structures was carried out. Both structures show the existence of a maximum in the acceleration rate at a certain initial electron energy, but the flat structure has a higher acceleration rate over the entire range of permissible energies.  Product Description popup.authors Vasyliev Andrii V. Zalesky Dmitro Yurievich Linnik Anatolij Fedorovich Povrozin Anatoliy Ivanovich Sotnikov Gennadij Vasylyovych popup.nrat_date 2023-01-12 Close