Transformation of the Shape and Spectrum of an Ultrawideband Electromagnetic Pulse in a “Gigantic” Coaxial Line Filled with Magnetized Plasma
A propagation of ultrawideband electromagnetic pulses (UWB EMPs) through magnetized plasma has been experimentally studied using a “gigantic” coaxial line, which has been developed at IAP RAS for laboratory modeling of ionospheric effects. This coaxial line is 1.4 m in diameter and 10 m in length an...
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MDPI AG
2024-01-01
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| Online Access: | https://www.mdpi.com/2076-3417/14/2/705 |
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| author | Ilya Zudin Mikhail Gushchin Sergey Korobkov Askold Strikovskiy Alexandr Katkov Vasiliy Kochedykov Irina Petrova |
| author_facet | Ilya Zudin Mikhail Gushchin Sergey Korobkov Askold Strikovskiy Alexandr Katkov Vasiliy Kochedykov Irina Petrova |
| author_sort | Ilya Zudin |
| collection | DOAJ |
| description | A propagation of ultrawideband electromagnetic pulses (UWB EMPs) through magnetized plasma has been experimentally studied using a “gigantic” coaxial line, which has been developed at IAP RAS for laboratory modeling of ionospheric effects. This coaxial line is 1.4 m in diameter and 10 m in length and is installed inside the chamber of the large-scale Krot plasma device. The line can be filled with rf inductively coupled plasma, magnetized or not. It allows one to explore the propagation of UWB EMPs in plasma along a long path without refraction and divergence and obtain a physical picture of EMP transformation. Under conditions where the duration of the UWB EMP is comparable to the period of electron plasma oscillations (<i>f<sub>p</sub></i><sup>−1</sup>), the period of cyclotron rotation of electrons (<i>f<sub>c</sub></i><sup>−1</sup>), or even significantly shorter, a complex of effects of transformation of the waveform and frequency spectrum of the pulse occurs. Without ambient magnetic field, a UWB EMP is distorted due to the effects of the cutoff and frequency dispersion. In dense magnetized plasma, i.e., when <i>f<sub>p</sub></i> >> <i>f<sub>c</sub></i>, the UWB EMP breaks into two wave packets, the high-frequency one (<i>f</i> > <i>f<sub>p</sub></i>) and low-frequency one (<i>f</i> < <i>f<sub>c</sub></i>). In rare magnetized plasma (<i>f<sub>p</sub></i> << <i>f<sub>c</sub></i>), the cyclotron absorption produces a long train of damped oscillations at a frequency close to the cyclotron frequency <i>f<sub>c</sub></i> following the UWB EMP. |
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| last_indexed | 2024-03-08T09:58:32Z |
| publishDate | 2024-01-01 |
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| spelling | doaj.art-293d7aff21ec4ff0a6809602eacfafd12024-01-29T13:43:50ZengMDPI AGApplied Sciences2076-34172024-01-0114270510.3390/app14020705Transformation of the Shape and Spectrum of an Ultrawideband Electromagnetic Pulse in a “Gigantic” Coaxial Line Filled with Magnetized PlasmaIlya Zudin0Mikhail Gushchin1Sergey Korobkov2Askold Strikovskiy3Alexandr Katkov4Vasiliy Kochedykov5Irina Petrova6Federal Research Center, A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), 603950 Nizhny Novgorod, RussiaFederal Research Center, A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), 603950 Nizhny Novgorod, RussiaFederal Research Center, A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), 603950 Nizhny Novgorod, RussiaFederal Research Center, A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), 603950 Nizhny Novgorod, RussiaFederal Research Center, A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), 603950 Nizhny Novgorod, RussiaFederal Research Center, A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), 603950 Nizhny Novgorod, RussiaFederal Research Center, A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), 603950 Nizhny Novgorod, RussiaA propagation of ultrawideband electromagnetic pulses (UWB EMPs) through magnetized plasma has been experimentally studied using a “gigantic” coaxial line, which has been developed at IAP RAS for laboratory modeling of ionospheric effects. This coaxial line is 1.4 m in diameter and 10 m in length and is installed inside the chamber of the large-scale Krot plasma device. The line can be filled with rf inductively coupled plasma, magnetized or not. It allows one to explore the propagation of UWB EMPs in plasma along a long path without refraction and divergence and obtain a physical picture of EMP transformation. Under conditions where the duration of the UWB EMP is comparable to the period of electron plasma oscillations (<i>f<sub>p</sub></i><sup>−1</sup>), the period of cyclotron rotation of electrons (<i>f<sub>c</sub></i><sup>−1</sup>), or even significantly shorter, a complex of effects of transformation of the waveform and frequency spectrum of the pulse occurs. Without ambient magnetic field, a UWB EMP is distorted due to the effects of the cutoff and frequency dispersion. In dense magnetized plasma, i.e., when <i>f<sub>p</sub></i> >> <i>f<sub>c</sub></i>, the UWB EMP breaks into two wave packets, the high-frequency one (<i>f</i> > <i>f<sub>p</sub></i>) and low-frequency one (<i>f</i> < <i>f<sub>c</sub></i>). In rare magnetized plasma (<i>f<sub>p</sub></i> << <i>f<sub>c</sub></i>), the cyclotron absorption produces a long train of damped oscillations at a frequency close to the cyclotron frequency <i>f<sub>c</sub></i> following the UWB EMP.https://www.mdpi.com/2076-3417/14/2/705electromagnetic pulsemagnetized plasmalaboratory simulationtransmission lines |
| spellingShingle | Ilya Zudin Mikhail Gushchin Sergey Korobkov Askold Strikovskiy Alexandr Katkov Vasiliy Kochedykov Irina Petrova Transformation of the Shape and Spectrum of an Ultrawideband Electromagnetic Pulse in a “Gigantic” Coaxial Line Filled with Magnetized Plasma Applied Sciences electromagnetic pulse magnetized plasma laboratory simulation transmission lines |
| title | Transformation of the Shape and Spectrum of an Ultrawideband Electromagnetic Pulse in a “Gigantic” Coaxial Line Filled with Magnetized Plasma |
| title_full | Transformation of the Shape and Spectrum of an Ultrawideband Electromagnetic Pulse in a “Gigantic” Coaxial Line Filled with Magnetized Plasma |
| title_fullStr | Transformation of the Shape and Spectrum of an Ultrawideband Electromagnetic Pulse in a “Gigantic” Coaxial Line Filled with Magnetized Plasma |
| title_full_unstemmed | Transformation of the Shape and Spectrum of an Ultrawideband Electromagnetic Pulse in a “Gigantic” Coaxial Line Filled with Magnetized Plasma |
| title_short | Transformation of the Shape and Spectrum of an Ultrawideband Electromagnetic Pulse in a “Gigantic” Coaxial Line Filled with Magnetized Plasma |
| title_sort | transformation of the shape and spectrum of an ultrawideband electromagnetic pulse in a gigantic coaxial line filled with magnetized plasma |
| topic | electromagnetic pulse magnetized plasma laboratory simulation transmission lines |
| url | https://www.mdpi.com/2076-3417/14/2/705 |
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