Electromagnetic sub-THz emission from a beam-plasma system with oblique density modulations

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

Recent experiments on the injection of kiloampere electron beams into a magnetized plasma at the GOL-PET facility have shown that the power of sub-terahertz radiation escaping from the plasma along the magnetic field increases by more than an order of magnitude if strong radial density gradients are preliminarily created in the plasma. In this work, we study effects of the different periodic density modulations on electromagnetic emission from the plasma. First, PIC simulations were performed with the strong transverse density gradient measured in the experiment. They did not show considerable increase in electromagnetic emission relative to the case of the uniform plasma. However, a small oblique modulation of the plasma density n = n0 + ∆n ∙ cos(q⃗ ∙ r⃗) with ∆n~0. 05 n0 makes it possible to obtain the power of the output radiation at the level of 1-3% of the beam power due to the antenna mechanism. This mechanism has been previously found to be effective only in a thin plasma with the radial size comparable with the radiation wavelength. In this work, based on analytical and simulation studies, we discuss how efficiently this mechanism can work in a thick plasma typical to GOL-PET experiments.

Язык оригиналаанглийский
Название основной публикации2021 46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021
ИздательIEEE Computer Society
ISBN (электронное издание)978-1-7281-9424-0
DOI
СостояниеОпубликовано - 2021
Событие46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021 - Chengdu, Китай
Продолжительность: 30 авг 20213 сен 2021

Серия публикаций

НазваниеInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Том2021-August
ISSN (печатное издание)2162-2027
ISSN (электронное издание)2162-2035

Конференция

Конференция46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021
СтранаКитай
ГородChengdu
Период30.08.202103.09.2021

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  • 2.02.IQ ИНЖЕНЕРИЯ, ЭЛЕКТРИЧЕСКАЯ И ЭЛЕКТРОННАЯ

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