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Background measurement methods for opacity experiments conducted at the Z facility.
G S Dunham1, T Nagayama1, J E Bailey1
1Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
The Review of Scientific Instruments
|September 2, 2021
Summary
Background signals can affect opacity experiments by reducing inferred opacity. Methods to measure these signals at the Sandia Z facility show modest background corrections, with future work planned for longer wavelengths.
Area of Science:
- Plasma physics
- Materials science
Background:
- Opacity experiments use spectrally resolved transmission measurements.
- Unaccounted background signals can artificially lower inferred opacity.
Purpose of the Study:
- Discuss methods for measuring background signals in opacity experiments.
- Quantify background signal impact at the Sandia Z facility.
Main Methods:
- Experimental measurement of background signals in opacity experiments.
- Utilizing the Sandia Z facility for data collection.
Main Results:
- Preliminary measurements show background signals are 9%-11% of the backlight signal at wavelengths < 10 Å.
- Background represents a modest correction for existing Z opacity data.
Conclusions:
- Background signal is a manageable factor in current Z opacity experiments.
- Further investigation is needed to assess background impact at longer wavelengths.
