Electric field of a relativistic electron avalanche

• In the present study, electromagnetic fields of accelerating charges were utilized to evaluate the electromagnetic fields generated by a relativistic electron avalanche. In the analysis it is assumed that all the electrons in the avalanche are moving with the same speed. In other words, the growth or the decay of the number of electrons takes place only at the head of the avalanche. It is shown that the radiation is emanating only from the head of the avalanche where electrons are being accelerated. It is also shown that an analytical expression for the radiation field of the avalanche at any distance can be written directly in terms of the e-folding length of the avalanche. This makes it possible to extract directly the spatial variation of the e-folding length of the avalanche from the measured radiation fields.

Nyckelord

Electromagnetic Fields

Lightning

TEM mode

transmission lines

Analytical expressions

E-folding

Number of electrons

Radiation field

Relativistic electron

Spatial variations

TEM modes

Electric fields

Electric lines

Lightning protection

Electrons

Teknisk fysik med inriktning mot elektricitetslära

Engineering Science with specialization in Science of Electricity

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