סמינר מחלקה אלקטרוניקה פיזיקאלית: Yoav Shoshani

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Localized microwave-heating of basalts –
Melting, lava-like eruption, and dusty-plasma ejection
By
Yoav Shoshani
MSc student under the supervision of Prof. Eli Jerby

Abstract
Localized microwave-heating (LMH) and the consequent formation of hotspots by thermal-runaway instability may cause local melting, and even plasma ejection by various materials. The LMH phenomenon, generated by the microwave-material interaction, enables a rapid heating within a localized zone (a hotspot, much smaller than the microwave wavelength). This local heating process evolves up to the occurrence of a phase transition of the solid material into liquid, gas or plasma. In this study, LMH phenomena of basalt melting, lava-like eruptions and dusty-plasma ejection are presented. This study includes experimental and numerical investigations of the LMH interactions of basalts with microwaves, characterization of the dusty plasma and its nano-particle products by various diagnostic means (in- and ex-situ). Additionally, these experimental results are considered in various scientific and practical aspects, namely their potential relevance to natural ball-lightning and volcanic effects, as well as their significance for several applications, such as construction, mining, powder generation, microwave-induced breakdown spectroscopy (MIBS), and mineral extraction.

On Thursday, February 28, 2019, 11:00
Room 234, Wolfson Building