scholarly journals Преобразование частоты излучения мощных гиротронов в условиях обратного рамановского рассеяния на дополнительном электронном пучке

Author(s):  
Н.С. Гинзбург ◽  
Л.А. Юровский ◽  
И.В. Зотова ◽  
А.С. Сергеев

AbstractThe regime of Raman backscattering of a pumping wave that is cocurrent with an electron beam into the counterpropagating wave can be used for the radiation frequency conversion in high-power gyrotrons. The absolute instability developing in this system ensures generation of a scattered signal in the absence of external resonators, which allows the frequency of scattered radiation to be smoothly controlled within 20–40% by varying the electron energy in the case of high-power (megawatt) gyrotrons used as sources of pumping radiation.

2019 ◽  
Vol 45 (2) ◽  
pp. 134-137
Author(s):  
N. S. Ginzburg ◽  
L. A. Yurovskii ◽  
I. V. Zotova ◽  
A. S. Sergeev

2018 ◽  
Vol 195 ◽  
pp. 01021
Author(s):  
L.A. Yurovskiy ◽  
N. S. Ginzburg ◽  
A.M. Malkin ◽  
A.S. Sergeev ◽  
I.V. Zotova

2020 ◽  
Vol 46 (23) ◽  
pp. 8
Author(s):  
Н.С. Гинзбург ◽  
Л.А. Юровский ◽  
А.В. Назаровский ◽  
А.С. Сергеев ◽  
И.В. Зотова

The possibility of generation of terahertz superradiance (SR) pulses in the case of incidental scattering of a laser pulse by a high-current relativistic electron beam with frequency conversion down is analyzed. Scattered radiation propagates in the opposite direction (with respect to the translational velocity of the particles). It is shown that when using pulses with an energy of 3 kJ at a wavelength of 1 μm as a pump during optimization of the laser pulse duration and the length of the interaction region, it is possible to generate pulses of scattered counter (relative to the translational particle velocity) radiation with a power of the order of 580 kW and a duration of 30 ps at a wavelength of 100 μm.


Nukleonika ◽  
2020 ◽  
Vol 65 (3) ◽  
pp. 167-172
Author(s):  
Zbigniew Zimek

AbstractX-rays application for radiation processing was introduced to the industrial practice, and in some circumstances is found to be more economically competitive, and offer more flexibility than gamma sources. Recent progress in high-power accelerators development gives opportunity to construct and apply reliable high-power electron beam to X-rays converters for the industrial application. The efficiency of the conversion process depends mainly on electron energy and atomic number of the target material, as it was determined in theoretical predictions and confirmed experimentally. However, the lower price of low-energy direct accelerators and their higher electrical efficiency may also have certain influence on process economy. There are number of auxiliary parameters that can effectively change the economical results of the process. The most important ones are as follows: average beam power level, spare part cost, and optimal shape of electron beam and electron beam utilization efficiency. All these parameters and related expenses may affect the unit cost of radiation facility operation and have a significant influence on X-ray process economy. The optimization of X-rays converter construction is also important, but it does not depend on the type of accelerator. The article discusses the economy of radiation processing with high-intensity of X-rays stream emitted by conversion of electron beams accelerated in direct accelerator (electron energy 2.5 MeV) and resonant accelerators (electron energy 5 MeV and 7.5 MeV). The evaluation and comparison of the costs of alternative technical solutions were included to estimate the unit cost of X-rays facility operation for average beam power 100 kW.


2019 ◽  
Vol 89 (5) ◽  
pp. 762
Author(s):  
A.В. Аржанников ◽  
Н.С. Гинзбург ◽  
В.Ю. Заславский ◽  
П.В. Калинин ◽  
Н.Ю. Песков ◽  
...  

AbstractQuasi-optical Bragg structures that represent sections of planar waveguides with tilted (with respect to the beam propagation direction) corrugation are studied. It is shown that such structures may serve as efficient deflectors for high-power wave fluxes and, hence, can be used for separation of microwave radiation and electron beam in relativistic masers. The corrugation configuration is optimized to increase the efficiency of transformation of wave fluxes to the transverse direction and improve uniformity of the spatial distribution of scattered radiation. The simulated results are verified using cold electrodynamic tests.


2000 ◽  
Author(s):  
Vladimir I. Perevodchikov ◽  
V. N. Shapenko ◽  
V. F. Martynov ◽  
P. M. Stalkov ◽  
A. L. Shapiro

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