Document Type

Article

Publication Date

2015

DOI

10.1063/1.4939569

Publication Title

AIP Advances

Volume

5

Issue

12

Pages

1-7

Abstract

This contribution presents a model analysis for the initiation of explosive emission; a phenomena that is observed at cathode surfaces under high current densities. Here, localized heating is quantitatively evaluated on ultrashort time scales as a potential mechanism that initiates explosive emission, based on a two-temperature, relaxation time model. Our calculations demonstrate a strong production of nonequilibrium phonons, ultimately leading to localized melting. Temperatures are predicted to reach the cathode melting point over nanosecond times within the first few monolayers of the protrusion. This result is in keeping with the temporal scales observed experimentally for the initiation of explosive emission.

Original Publication Citation

Majzoobi, A., Joshi, R.P., Neuber, A., & Dickens, J. (2015). Heating based model analysis for explosive emission initiation at metal cathodes. AIP Advances, 5(12), 1-7. doi: 10.1063/1.4939569

ORCID

0000-0002-0562-8732 (Majzoobi)

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