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Journal of Radio Electronics Online scientific journal · eISSN 1684-1719
2025, № 11 · PHYSICAL PROBLEMS OF ELECTRONICS

Radiation spectrum of plasma formed by the explosion of microtrusions during microwave breakdown

E.V. Oreshkin1

1 P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
Full text DOI: 10.30898/1684-1719.2025.11.5 UDC 537.84 EDN ZDIEKU

Abstract

Under the conditions of exposure to strong microwave electromagnetic waves on accelerating systems, explosive emission processes that occur due to the destruction of micro-irregularities on the surface of electrodes play a key role. The paper presents the results of radiation magnetohydrodynamic calculations of the explosion of copper conductors under conditions similar to those that occur during the explosion of microprotrusions. This means that the current density is on the order of 109 A/cm². The microwave mode of micro-irregularity explosion was examined. It was found that the maximum of the spectral distribution of radiation during the explosion of a microprotrusion falls within the ultraviolet range.

  • explosive emission
  • radiation-magnetohydrodynamic (RMHD) modeling
  • Microwave breakdown
Аннотация (на русском)

Спектр излучения плазмы, формирующейся при взрыве микронеоднородностей при СВЧ пробое

В условиях воздействия сильных СВЧ электромагнитных волн на ускоряющие системы ключевую роль играют процессы взрывной эмиссии, возникающие вследствие разрушения микронеровностей на поверхности электродов. В работе представлены результаты радиационно-магнитогидродинамических расчётов взрыва медных проводников в условиях, аналогичных тем, что возникают при взрыве микронеровностей. Это означает, что плотность тока составляет порядка 10⁹ А/см². Был рассмотрен СВЧ режим взрыва микронеровности. Выяснилось, что максимум спектрального распределения излучения при взрыве микронеровности приходится на ультрафиолетовый диапазон.

For citation

Oreshkin E.V. Radiation spectrum of plasma formed by the explosion of microtrusions during microwave breakdown // Journal of Radio Electronics. – 2025. – No. 11. https://doi.org/10.30898/1684-1719.2025.11.5

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