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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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A 0.2-MW Furnace for Spectroscopic Studies.

B S Collins, A D Petford, D E Blackwell

|January 16, 2010

Summary

A new King furnace design enables precise measurement of relative oscillator strengths using absorption spectroscopy. This advancement offers a low noise level for detailed spectral analysis in physics research.

Area of Science:

Atomic and Molecular Physics
Spectroscopy
Physical Chemistry

Background:

Accurate determination of oscillator strengths is crucial for understanding atomic and molecular processes.
Traditional methods may face limitations in precision and signal-to-noise ratio.
Development of advanced experimental setups is needed for improved spectral measurements.

Purpose of the Study:

To describe the design and implementation of a large King furnace for absorption spectroscopy.
To evaluate the performance of the furnace in conjunction with a low-noise spectrometer.
To demonstrate the capability for precise measurement of relative oscillator strengths.

Main Methods:

Utilized a large King furnace for high-temperature absorption experiments.

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Employed the Oxford low-noise spectrometer for spectral line detection.

Analyzed absorption traces to determine relative oscillator strengths.

Characterized the noise performance of the spectroscopic apparatus.

Main Results:

The King furnace design criteria were successfully addressed.
Representative absorption line traces were obtained with high fidelity.
Achieved an rms noise level of 0.03% of the continuum at 4427 Å.
Demonstrated a resolving power of lambda/Deltalambda = 1.1 x 10^5 with a 16-second integration time per point.

Conclusions:

The developed King furnace is suitable for accurate relative oscillator strength measurements via absorption.
The combination with the Oxford low-noise spectrometer provides excellent sensitivity and resolution.
The experimental setup offers a valuable tool for spectroscopic studies in atomic and molecular physics.