Abstract
Semiconductor microwaves (MWs) was applied for plasma generation system. Laser or electric spark is used as initial plasma igniter, and then the plasma was steadily sustained by the MWs. The emission of OH radical shows us the perfect controllability in time and space of the plasma by MW control. Even in continuous wave operation of MWs, the low energy system can prevent the formation of high temperature thermal plasma (> 10000 K) without any mechanical cooling system, and afforded spherical ball shaped plasma. The plasma ball could be applied to plasma emission spectroscopy analysis like Laser-Induced Breakdown Spectroscopy (LIBS). For example, MWs could drastically enhance the emission intensity of metal wires and powders (Cu, Pb, Ca, Mo, Co. Cr) than the case without MWs.
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