Coronal Magnetic Loop as an Equivalent Electric Circuit

2012 ◽  
pp. 9-37 ◽  
Keyword(s):  
Electric Circuit ◽  
Magnetic Loop ◽  
Equivalent Electric Circuit ◽  
Coronal Magnetic Loop

МАКРОМОДЕЛИРОВАНИЕ СХЕМЫ ФАПЧ С ИСПОЛЬЗОВАНИЕМ ПОЛНОЙ ПРИНЦИПИАЛЬНОЙ СХЕМЫ ФАЗОВОГО ДЕТЕКТОРА

2020 ◽  
Vol 96 (3s) ◽  
pp. 295-299
Author(s):  
М.М. Гурарий ◽  
М.М. Жаров ◽  
Л.П. Ионов ◽  
И.И. Мухин ◽  
С.Г. Русаков ◽  
...  
Keyword(s):  
Electric Circuit ◽  
Schematic Diagram ◽  
Equivalent Electric Circuit ◽  
Phase Frequency Detector ◽  
Frequency Detector ◽  
A Current

В работе рассмотрены проблемы анализа схем ФАПЧ с учетом наличия неидеальностей в схеме частотно-фазового детектора с токовым ключом. Для снижения затрат на моделирование предложено использовать эквивалентную электрическую схему, содержащую полную принципиальную схему ЧФД и схемные эквиваленты макромоделей остальных блоков ФАПЧ. The paper considers the problems of analyzing the PLL circuit taking into account the presence of nonidealities in the phase-frequency detector with a current key. To reduce the simulation efforts, it has been proposed to apply an equivalent electric circuit containing the complete schematic diagram of the PFD and circuit equivalents of the macromodels of other PLL blocks.

Equivalent Electric Circuit Models of Coronal Magnetic Loops and Related Oscillatory Phenomena on the Sun

2009 ◽  
Vol 149 (1-4) ◽  
pp. 83-117 ◽  
Author(s):  
Maxim L. Khodachenko ◽  
Valerii V. Zaitsev ◽  
Albert G. Kislyakov ◽  
Alexander V. Stepanov
Keyword(s):  
Electric Circuit ◽  
The Sun ◽  
Equivalent Electric Circuit ◽  
Coronal Magnetic Loops

Analysis of space charge relaxation by equivalent electric circuit for yttrium doped CaF2

1999 ◽  
Vol 60 (2) ◽  
pp. 247-256 ◽  
Author(s):  
Kazuaki Tanaka ◽  
Katsumi Tanaka ◽  
Katsuyasu Kawano ◽  
Ryouhei Nakata
Keyword(s):  
Space Charge ◽  
Electric Circuit ◽  
Equivalent Electric Circuit ◽  
Charge Relaxation

scholarly journals Engineering Aspheric Liquid Crystal Lenses by Using the Transmission Electrode Technique

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 835
Author(s):  
José Francisco Algorri ◽  
Dimitrios C. Zografopoulos ◽  
Luis Rodríguez-Cobo ◽  
José Manuel Sánchez-Pena ◽  
José Miguel López-Higuera
Keyword(s):  
Liquid Crystal ◽  
Numerical Simulations ◽  
Least Squares ◽  
Least Squares Method ◽  
Electric Circuit ◽  
Equivalent Electric Circuit ◽  
Novel Technique ◽  
Analytical Expressions ◽  
Manufacturing Parameters ◽  
Electrode Technique

The transmission electrode technique has been recently proposed as a versatile method to obtain various types of liquid-crystal (LC) lenses. In this work, an equivalent electric circuit and new analytical expressions based on this technique are developed. In addition, novel electrode shapes are proposed in order to generate different phase profiles. The analytical expressions depend on manufacturing parameters that have been optimized by using the least squares method. Thanks to the proposed design equations and the associated optimization, the feasibility of engineering any kind of aspheric LC lenses is demonstrated, which is key to obtain aberration-free lenses. The results are compared to numerical simulations validating the proposed equations. This novel technique, in combination with the proposed design equations, opens a new path for the design and fabrication of LC lenses and even other types of adaptive-focus lenses based on voltage control.

scholarly journals Source Structure in Metre-Wave Type V Solar Bursts

1974 ◽  
Vol 57 ◽  
pp. 235-238
Author(s):  
N. R. Labrum ◽  
R. A. Duncan
Keyword(s):  
Second Harmonic ◽  
Magnetic Loop ◽  
Plasma Waves ◽  
Trapping Region ◽  
Type Iii ◽  
Coronal Magnetic Loop ◽  
Field Lines ◽  
Set Up ◽  
Type V ◽  
Open Magnetic Field

(Astrophys. Letters). The type V burst has been defined as a wideband continuum which sometimes appears for a minute or so following a type III burst (Wild et al., 1959b). It is now generally accepted that type III bursts arise from plasma waves set up by electrons escaping with velocity ~c/3 along open magnetic field lines (Wild et al., 1959a; Stewart, 1965); the most widely accepted explanation of type V continua is that they arise from plasma waves set up by electrons of similar velocity which have become trapped in a coronal magnetic loop (Weiss and Stewart, 1975). On this hypothesis the plasma waves are set up by two opposing electron streams in the trapping region, and from this consideration Zheleznyakov and Zaitsev (1968) have concluded that type V emission should be predominantly at the second harmonic of the local plasma frequency. In this paper we describe and discuss some two-dimensional observations of source positions of type III–V events which were obtained at 80 MHz on the Culgoora radioheliograph.

scholarly journals Microwave Burst Timescales and Solar Flare Acceleration Processes

1994 ◽  
Vol 142 ◽  
pp. 683-688
Author(s):  
A. Krüger ◽  
B. Kliem ◽  
J. Hildebrandt ◽  
V. V. Zaitsev
Keyword(s):  
Electric Circuit ◽  
Magnetic Loop ◽  
Circuit Model ◽  
Simultaneous Occurrence ◽  
Loop Model ◽  
Coalescence Model ◽  
Solar Microwave ◽  
Fine Structures ◽  
Time Structures ◽  
Front Model

AbstractThe occurrence of quite different timescales in solar microwave bursts is considered and possible ways of their physical interpretation are discussed. An interesting feature is the existence of hierarchic time structures, an example of which is provided by the solar event of 1991 March 23.Plasma parameter sets to be invoked for the interpretation of timescales are estimated on the base of different models such as the collisionless conduction front model, the twisted magnetic loop model, the coalescence model, and the electric circuit model. With emphasis on the interpretation of burst fine structures with timescales of a few seconds the coalescence model has been favored. On the other hand, the simultaneous occurrence of a large range of different timescales appears well suited to be described by the circuit model.Subject headings: acceleration of particles — Sun: flares — Sun: radio radiation

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