Spectral radiance of a low current graphite arc

Area of Science:

• Spectroscopy
• Radiometry
• Materials Science

Background:

• Accurate spectral radiance data is crucial for various applications, including lighting and remote sensing.
• Graphite arcs are utilized as light sources, but their spectral characteristics require precise quantification.

Purpose of the Study:

• To determine the spectral radiance of a low current graphite arc anode.
• To provide high-accuracy spectral data across a broad wavelength range (850-210 nm).

Main Methods:

• Utilized a recently developed high-accuracy spectroradiometer.
• Measured spectral radiance at twenty discrete wavelength points and as a continuous function.
• Excluded regions with significant molecular band radiation from the arc stream.

Main Results:

• Spectral radiance data was obtained for the graphite arc anode from 850 nm to 210 nm.
• Estimated standard deviation uncertainty ranged from approximately 1.5% at longer wavelengths to 5% at shorter wavelengths.
• Continuous spectral radiance data is provided, with exceptions for specific molecular band regions.

Conclusions:

• The study successfully quantified the spectral radiance of a graphite arc anode with high accuracy.
• The generated data serves as a valuable reference for applications requiring precise spectral information in the ultraviolet to near-infrared range.