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The Calculated Continuous Emission of a LTE Hydrogen Plasma
1Institute for Basic Standards, National Bureau of Standards, Washington, D.C. 20234.
Summary
This study calculates the continuous emission of hydrogen plasma, crucial for developing high-intensity spectral radiance calibration standards. The findings enable precise radiation measurements in laboratory settings.
Area of Science:
- Plasma Physics
- Atomic and Molecular Spectroscopy
- Radiometry
Background:
- Accurate spectral radiance calibration is essential for various scientific and industrial applications.
- Hydrogen plasma is a relevant source for high-intensity radiation due to its fundamental atomic structure.
- Previous calculations may not have fully encompassed all significant emission contributions.
Purpose of the Study:
- To calculate the total continuous emission coefficient for LTE hydrogen plasma.
- To provide data for a specific temperature range (8000–16000 K) and wavelength range (400–15000 Å).
- To establish a basis for using laboratory hydrogen plasma as a spectral radiance calibration standard.
Main Methods:
- Utilized calculations for the total continuous emission coefficient.
- Included contributions from neutral hydrogen (H), electrons (e-), negative hydrogen ions (H-), and molecular hydrogen (H2).
- Incorporated the effects of Stark broadening in hydrogen line wings.
Main Results:
- Comprehensive emission coefficient data was generated for the specified plasma conditions.
- The study quantifies the radiative properties of hydrogen plasma across a wide spectral range.
- All major continuous emission mechanisms were considered.
Conclusions:
- The calculated emission coefficients are vital for characterizing hydrogen plasma radiation.
- This work facilitates the use of laboratory hydrogen plasma as a reliable spectral radiance calibration standard.
- The findings support advancements in high-intensity spectral metrology.
Keywords:
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