INVESTIGATION OF NONLINEAR INTERACTION OF ELECTROMAGNETIC RADIATION WITH SPACE CHARGE IN VACUUM ELECTRONIC DEVICES

2012 ◽  
Vol 15 ◽  
pp. 105-112
Author(s):  
A.H. MAKARYAN ◽  
H.S. HAROYAN ◽  
V.A. SAHAKYAN ◽  
V.R. TADEVOSYAN
Keyword(s):  
Electromagnetic Radiation ◽  
Space Charge ◽  
Nonlinear Interaction ◽  
Radiation Power ◽  
Incident Radiation ◽  
Polarization Current ◽  
Vacuum Electronic Devices ◽  
Power Direction ◽  
Current Characteristics ◽  
Detection Characteristics

The nonlinear interaction of electromagnetic radiation in microwave, terahertz, and optical regions with non-uniformly distributed space charge in the interelectrode space of vacuum devices is investigated. The detection of electromagnetic radiation in the vacuum electronic tubes (diode and triode) with parallel plate electrodes is experimentally demonstrated. The dependence of the detected signal on the incident radiation power, direction of wave polarization, current characteristics and frequency of modulating signal has been investigated. The equation of motion of an electron in the field of electromagnetic wave in the presence of space charge was obtained, according to which, the detection is due to nonlinearity associated with the non-uniform distribution of electrons along the electrostatic field direction. The measured detection characteristics are in reasonable agreement with theoretical estimates.

scholarly journals Influence of the near-surface regions of the space charge in semiconductor crystals on defect transformation stimulated by action of magnetic fields

2021 ◽  
Vol 24 (1) ◽  
pp. 43-47
Author(s):  
G.V. Milenin ◽  
◽  
R.A. Redko ◽  
◽  
Keyword(s):  
Magnetic Fields ◽  
Electromagnetic Radiation ◽  
Space Charge ◽  
Radiation Power ◽  
Charge Carriers ◽  
Induction Vector ◽  
Near Surface ◽  
Semiconductor Crystals

The mechanisms of electromagnetic radiation in the near-surface regions of semiconductors depleted of the majority charge carriers under action of magnetic fields, the induction vector of which is parallel to the surface of the crystal, have been analyzed. The relationships for estimating the radiation power of space charge regions have been derived.

scholarly journals Боковой перенос энергии при возбуждении плазмонов терагерцовой волной в периодической пространственно несимметричной графеновой структуре

2019 ◽  
Vol 53 (9) ◽  
pp. 1189
Author(s):  
Д.В. Фатеев ◽  
К.В. Машинский ◽  
И.М. Моисеенко ◽  
В.В. Попов
Keyword(s):  
Incident Wave ◽  
Radiation Power ◽  
Power Conversion ◽  
Incident Radiation ◽  
Terahertz Wave ◽  
Wave Power ◽  
Excitation Condition ◽  
Maximum Conversion

AbstractThe power conversion of a terahertz wave normally incident on a periodic graphene structure to propagating-plasmon power is theoretically studied. The conditions of the maximum conversion of the incident radiation power to the propagating-plasmon power and excitation condition of unidirectional traveling plasmon are determined. It is found that up to 15% of the incident wave power can be converted to propagating-plasmon power.

scholarly journals Magnetic Field Instability of a Plasma in a Beam of Electromagnetic Radiation

1980 ◽  
Vol 35 (4) ◽  
pp. 461-463 ◽  
Author(s):  
O. M. Gradov ◽  
L. Stenflo
Keyword(s):  
Magnetic Field ◽  
Spatial Distribution ◽  
Magnetic Fields ◽  
Field Strength ◽  
Electromagnetic Radiation ◽  
Characteristic Time ◽  
Incident Radiation ◽  
Maximum Value ◽  
Quasi Stationary State ◽  
The Magnetic Field

Abstract A beam of electromagnetic radiation can generate magnetic fields in plasmas. It is shown that those fields grow significantly when the incident radiation is sufficiently strong. We obtain expressions for the characteristic time of the growth of the fields as well as for their spatial distribution and point out a possible mechanism, which can lead to the formation of a quasi-stationary state. The maximum value of the magnetic field strength is estimated

Modeling of Interaction Layers from Conductive Microparticles with TE Electromagnetic Wave

2013 ◽  
Vol 646 ◽  
pp. 245-248
Author(s):  
Anton Anzulevich ◽  
Leonid But’ko ◽  
Sergey Moiseev ◽  
Il’ya Zotov
Keyword(s):  
Electromagnetic Wave ◽  
Electromagnetic Radiation ◽  
Incident Radiation ◽  
Spherical Particles ◽  
Metal Powders ◽  
Micro Particles ◽  
Wave Heating ◽  
Powder Metals ◽  
Size Of Particles

Dependences of distribution, penetration, reflection and absorption of microwaves in the layers of conductive micro-particles on the frequency of the incident radiation and size of particles are obtained and investigated. Layers of conductive spherical particles as the shell, and without it are accepted in our work as the most common model of powder metals. So, this study allows to describe and classify features of electromagnetic wave heating of various metal powders and to predict the performance, in which it will be effective heating of metal powders by electromagnetic radiation.

A comparison of injection laws for the space charge equations in gases and dielectrics

1993 ◽  
Vol 443 (1919) ◽  
pp. 517-546 ◽  
Keyword(s):  
Electric Field ◽  
Space Charge ◽  
Field Distribution ◽  
Steady Motion ◽  
Plane Geometry ◽  
Symmetric Problem ◽  
Injection Process ◽  
Underlying Geometry ◽  
Current Characteristics ◽  
The Stability

We consider the steady motion of space charge from an injecting electrode to an earthed electrode in both a gas and a dielectric. Three models governing the process of charge injection from the electrode into the medium are compared and the resulting voltage–current characteristics calculated. In particular we examine injection laws in which the electric field, charge or current are specified. It is shown that if the injecting electrode is small in comparison to the underlying geometry then the resulting field distribution is almost independent of the injection process. The stability of the three models is compared and it is shown that the field specified and charge specified models are always stable. The calculations are performed exactly for the case of a symmetric problem and make use of the Deutsch approximation for a needle-plane geometry.

THE RESPONSIBILITY OF HIGH Tc SUPERCONDUCTOR DETECTOR

1988 ◽  
Vol 01 (11n12) ◽  
pp. 431-435 ◽  
Author(s):  
CHANGXIN FAN ◽  
LIANGKAI YU
Keyword(s):  
Electromagnetic Radiation ◽  
Josephson Junction ◽  
Critical Current ◽  
Radiation Power ◽  
Radiation Detector ◽  
Dynamic Resistance ◽  
High Tc ◽  
High Tc Superconductor ◽  
Detector Experiment ◽  
Current Device

The V-I characteristics of Y-Ba-Cu-O device is different from that of conventional low Tc Josephson junction. This enables us to use the small critical current device as an electromagnetic radiation detector. Experiment shows that the smaller the critical current is, the greater the dynamic resistance and the higher the voltage responsibility to radiation power. When the critical current is adjusted down to zero but the V-I curve is still obviously nonlinear, the device will have highest responsibility.

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