Enhancement of LIBS emission using antenna-coupled microwave.
This engineering study describes using antenna-coupled microwave radiation to enhance laser-induced breakdown spectroscopy (LIBS) emission from a Gd2O3 sample at reduced pressure. The authors report substantially increased plasma emission intensity, higher-temperature plasma, and longer emission lifetime when microwaves are absorbed by the laser plasma. They report up to 32× enhancement of Gd lines and an approximate Ca detection limit of 2 mg/kg using a linear calibration curve.
Key points
- Microwave radiation was introduced via a 3 mm diameter loop antenna to couple energy into a laser-induced plasma.
- A pulsed Nd:YAG laser (532 nm, 10 ns, 5 mJ) was used to generate plasma on a Gd2O3 sample at reduced pressure.
- The plasma emission was reported to increase significantly due to microwave absorption.
- The method was reported to produce higher-temperature plasma and longer-lifetime plasma emission.
- Gd spectral line intensities were reported to be enhanced up to 32 times depending on the emission line.
- A linear calibration curve for Ca in Gd2O3 was constructed, with an approximate detection limit of 2 mg/kg.
- The authors state the approach is useful for identifying trace elements in nuclear fuel and radioactive materials.
Referenced studies & papers
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AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
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