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Characterizing x-ray transmission through filters used in high energy density physics diagnostics
J Pearcy1, N Kabadi1, A Birkel1
1Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA.
The Review of Scientific Instruments
|July 10, 2021
Summary
A new system accurately measures x-ray transmission curves for filters in high-energy density physics. This method validates filter properties using advanced detectors and a custom x-ray source.
Area of Science:
- Physics
- Materials Science
- X-ray Optics
Background:
- Characterizing x-ray transmission through filters is crucial for high-energy density physics (HEDP) diagnostics.
- Accurate filter characterization ensures reliable data acquisition in HEDP experiments.
Purpose of the Study:
- To design and implement a novel system for characterizing the energy-dependent x-ray transmission curve, Θ(E), of filters.
- To validate the accuracy of the developed system by reproducing known filter properties.
Main Methods:
- Utilized an Amptek X-123-CdTe x-ray spectrometer and a silicon surface barrier detector for x-ray source measurement.
- Employed a custom PROTO-XRD x-ray source with interchangeable cathodes for filter analysis.
- Coupled detectors with the x-ray source to obtain energy-dependent transmission data.
Main Results:
- Successfully characterized the energy-dependent x-ray transmission curves, Θ(E), for various filters.
- Validated the system's accuracy by precisely reproducing areal densities of known high-purity filters.
- Demonstrated the capability to calibrate absorption for diverse filter materials and thicknesses.
Conclusions:
- The developed system provides an accurate and reliable method for characterizing x-ray filter transmission.
- This technique enhances the precision of diagnostics in high-energy density physics.
- The study presents a validated experimental setup for filter absorption calibration.
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