Work

Electromagnetic emission of a hollow needle to mesh negative corona and quasi-periodical spark discharge in the air

Year: 2025

Type: article

Abstract: We investigated the emission of electromagnetic waves from the stainless-steel hollow needle to mesh corona and quasi-periodical spark discharge without and with airflow through the negative needle electrode in the frequency range below 500 MHz. We showed that there is no electromagnetic waves emission from the pulseless corona discharge. After the discharge transition to the quasi-periodical spark, high-amplitude current pulses correlate with the bursts of electromagnetic radiation. We demonstrated that the spectral distribution of emitted radiation is independent of the discharge voltage, current, and airflow through the needle electrode. We found that the highest peak of the power level of the electric component of emitted waves occurs at the frequency of 15.2 MHz, and the power level of emitted radiation as a function of frequency gradually decreases. Graphical abstract

Source: The European Physical Journal D

DOI: 10.1140/epjd/s10053-025-00975-2

Author: Stanislav Pekárek

Institution: Czech Technical University in Prague

Language: English

Topic: Plasma Applications and Diagnostics

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: hybrid

Estimated APC paid: $3,790

Funders: České Vysoké Učení Technické v Praze, Ministerstvo Školství, Mládeže a Tělovýchovy