Abstract

Acoustic signals induced in a NiAl multilayer system on a steel substrate irradiated with a microsecond low - energy high-current electron beam (LEHCEB) are investigated. The characteristic acoustic signal waveforms, their amplitudes, phases, and frequencies are experimentally measured. It is found that at a beam charge voltage of 22 kV, for each pulse, the qualitative amplitude-frequency composition of acoustic signals in the target is preserved. The acoustic signal with the main frequencies 22-31 kHz, 64-66 kHz, 80 kHz 93-96 kHz, 115-136 kHz and 160-168 kHz exposed to the pulse electron beam is excited in the NiAi multilayer system on the steel substrate It was found that the spectrum of the acoustic signal in the sample under study contains coincident or close harmonics of the spectrum of the acoustic signal in a copper target. This will allow the processes to be studied in detail when exposing to LEHCEB.

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