{"title":"Dependence of the Parameters of VLF Chorus Emissions in the Earth’s Magnetosphere on Quasi-Static Variations of the Magnetic Field","authors":"A. G. Demekhov","doi":"10.1007/s11141-025-10373-8","DOIUrl":null,"url":null,"abstract":"<p>We present the results of numerical simulations of VLF chorus emissions in the magnetospheric cyclotron maser within the framework of the backward wave oscillator (BWO) regime model. Specific features of the dynamic wave spectrum at various points inside the generation region in the presence of quasi-static variations of the geomagnetic field are considered. We show that discrete elements with both increasing and decreasing frequency can be generated, and the dynamic spectrum shape can change qualitatively upon the shift of the observation point inside the generation region. We discuss this dependence of the dynamic spectrum of the generated waves on the position of the observer in the generation region for various parameters of the geomagnetic field distortion. We show that the formation of elements with an increasing (decreasing) frequency is determined by the presence of the regions with local minima (maxima) of the external magnetic field.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 4","pages":"281 - 295"},"PeriodicalIF":0.8000,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiophysics and Quantum Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11141-025-10373-8","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
We present the results of numerical simulations of VLF chorus emissions in the magnetospheric cyclotron maser within the framework of the backward wave oscillator (BWO) regime model. Specific features of the dynamic wave spectrum at various points inside the generation region in the presence of quasi-static variations of the geomagnetic field are considered. We show that discrete elements with both increasing and decreasing frequency can be generated, and the dynamic spectrum shape can change qualitatively upon the shift of the observation point inside the generation region. We discuss this dependence of the dynamic spectrum of the generated waves on the position of the observer in the generation region for various parameters of the geomagnetic field distortion. We show that the formation of elements with an increasing (decreasing) frequency is determined by the presence of the regions with local minima (maxima) of the external magnetic field.
期刊介绍：
Radiophysics and Quantum Electronics contains the most recent and best Russian research on topics such as:
Radio astronomy;
Plasma astrophysics;
Ionospheric, atmospheric and oceanic physics;
Radiowave propagation;
Quantum radiophysics;
Pphysics of oscillations and waves;
Physics of plasmas;
Statistical radiophysics;
Electrodynamics;
Vacuum and plasma electronics;
Acoustics;
Solid-state electronics.
Radiophysics and Quantum Electronics is a translation of the Russian journal Izvestiya VUZ. Radiofizika, published by the Radiophysical Research Institute and N.I. Lobachevsky State University at Nizhnii Novgorod, Russia. The Russian volume-year is published in English beginning in April.
All articles are peer-reviewed.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
