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Updated: Mar 11, 2026

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
A high-resolving-power x-ray spectrometer for the OMEGA EP Laser (invited)
P M Nilson1, F Ehrne1, C Mileham1
1Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
A new x-ray spectrometer was developed for the OMEGA EP Laser System to measure copper K-alpha emission spectra. This instrument will enable studies of temperature-equilibration dynamics in rapidly heated materials.
Area of Science:
- Plasma Physics
- X-ray Spectroscopy
- Laser-drivencience
Background:
- High-energy-density science requires precise diagnostics for x-ray emission.
- OMEGA EP Laser System provides a platform for studying laser-matter interactions.
Purpose of the Study:
- Develop a high-resolving-power x-ray spectrometer for OMEGA EP.
- Measure time-integrated x-ray spectra around the Cu Kα line.
- Enable future ultrafast streaked x-ray spectroscopy.
Main Methods:
- Utilized a spherically bent Si [220] crystal (330 mm radius).
- Employed a Spectral Instruments (SI) 800 Series charge-coupled device.
- Measured spectra from Cu foils irradiated by 100-J, 1-ps laser pulses (>10^18 W/cm^2).
Main Results:
- Successfully developed and tested a high-resolving-power x-ray spectrometer.
- Measured Cu Kα1,2 emission spectra under high-power laser irradiation.
- Demonstrated spectrometer performance in a high-energy-density regime.
Conclusions:
- The developed spectrometer is suitable for time-integrated x-ray emission measurements.
- Future integration with a streak camera will allow dynamic studies.
- This work advances diagnostics for laser-driven science.
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