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We have obtained the system of cubic-nonlinear differential equations for the complex amplitudes of the electromagnetic fields of eigenwaves in a plasma-beam superheterodyne free-electron laser (FEL) of the Doppleron type. We have found that a decrease of the axial guiding magnetic field strength leads to an increase of the signal wave saturation levels. We have found the value of the axial guiding...
In this article the positive effect of vibration damping based on the introducing phase shift between the vibrosignals brought to the points of attachment of electronic devices is shown. A diagram block of information-measuring control system of active vibration protection of electronic devices allowing to lower vibration exposure by changing the phase of vibration signals is also presented. Authors...
The article describes design solutions for increasing the reliability of radio equipment. The authors suggest the introduction of non-linear element into the inter-board connection of the PCB package as a damping device. In this case the forced oscillations of PCBs are absorbed by the damping device of the central connecting element due to the fact that some part of energy, emitted by a more active...
A cubic nonlinear self-consistent theory of multiharmonic two-stream superheterodyne free electron lasers (TSFEL) of a klystron type, intended to form powerful ultrashort clusters of an electromagnetic field is constructed. Plural three-wave parametric resonant interactions of wave harmonics have been taken into account. An amplitude, phase and spectral analyses of the processes occurring in such...
The article highlights the problems of the efficiency of vibration test methods and means. It gives the brief overview of existing methods. It also gives characteristics of the developed multi-channel vibration measurement machine, its component parts and the benefits of its application. The test results are given that prove that the developed vibration vibration measurement machine allows to reproduce...
The authors developed an information measuring system which allows determining the dynamic behavior of the most relevant properties of a test object. This is an important aspect by choosing methods, tools and modes of vibration tests. The authors described block diagram model of the information measuring system and the test signal forming algorithm.
A conceptual model for determination of vibro-loaded and vibro-safe areas of the board, based on the analysis of flexural vibrations of rods and spread of elastic deformation waves from the point sources with cylindrical symmetry in the body of the plate, is proposed. A scheme for the experimental installation with the use of different types of sensors to check the model and to study the dynamic behavior...
A quadratic theory of a plasma-beam superheterodyne free electron laser of the dopplertron type with non-axial electron beam entry is constructed. It is found, that four different operation modes in the investigated device can be realized. The conditions with peak amplification factor are determined. It is shown that amplification factors of electromagnetic signal in all operation modes of the device...
Two types of NC NVM structures had been tested for W/E window formation, charge relaxation and retention. It was shown that the difference between two structures types is significant.
The quadratic-nonlinear theory of multiharmonic superheterodyne free electron laser (SFEL) with the longitudinal electrostatic undulator is constructed. It is shown, that the multiple parametric resonances of the space charge waves (SCW) take place in the investigated SFEL Their growth increments do not depend on frequencies of waves. It has been found out, that multi-harmonic resonances of longitudinal...
The paper presents design and test results for a conduction cooled 8 T superconducting magnetic system with a variable temperature insert for electrical measurements. The system is based on one Pulse Tube cryocooler. The helium gas gap heat switch is used as controllable thermal link between variable temperature chamber and the 4 K stage to avoid overheating of the magnet at high temperatures of the...
In-situ characterization of samples by experts, using high resolution gamma spectrometers, is required if low resolution NaI detector-based hand-held radionuclide identification devices are unable to provide definite spectral identifications. In some remote locations, the use of liquid N-2 cooled HPGe detectors is not possible. Electrically cooled HPGe detectors are not always a feasible alternative,...
Development of nanocluster based non volatile memory (NVM) cells instead of the commonly used floating gate structures requires a new approach to the reliability testing of nanocluster NVM structures. The algorithm of this testing is rather complex and cannot be implemented without computer based diagnostic systems. The paper presented deals with the testing algorithms of the nanocluster NVM cells...
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