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— A 0.9 to 1.5 kW, 2.45 GHz atmospheric pressure air microwave plasma torch has been operated efficiently with less than 1 % reflected power. The plasma is sustained in a 28 mm internal diameter fused quartz tube which penetrates perpendicularly through the wide walls of a tapered and shorted WR-284 (72 x 17 mm cross-section) waveguide. A study has been(More)
A microwave plasma combined with atomic emission spectroscopy is being developed for real time emission monitoring of metals in smokestacks. The plasma is sustained by 1.5 kW, 2.45 GHz microwave radiation in a gas flow at atmospheric pressure. The addition of oxygen to a nitrogen gas stream reduces dramati1cally the emission intensity of the 253.65 nm(More)
A 1.5 kW, 2.45 GHz microwave sustained plasma in a flowing sample of stack exhaust gas has been shown in recent DOE/EPA testing to be an accurate monitor of trace hazardous metals (in the part per billion range) such as lead, chromium, and beryllium. Optical-UV spectroscopic studies are being carried out to better understand this particular atmospheric(More)
Olive (Sebastes serranoides), black (Sebastes melanops), and blue rockfish (Sebastes mystinus) are all common inhabitants of nearshore ecosystems on the West coast of North America and important components of the recreational fishery off California. Acoustic monitoring studies indicate that olive rockfish are highly residential and that black rockfish are(More)
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