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High repetition-rate dual-channel X-ray spectrometer for high-intensity laser-plasma experiments
G Zeraouli1,2, D A Mariscal2, K K Swanson2
1Colorado State University, Fort Collins, Colorado 80523, USA.
The Review of Scientific Instruments
|July 11, 2024
Summary
A new dual-channel x-ray spectrometer was developed for high-intensity laser-plasma experiments. This instrument, the HR-DC-HOPG, operates at high repetition rates and resolves distinct x-ray energy bands.
Area of Science:
- Plasma Physics
- X-ray Spectroscopy
- Laser-driven Experiments
Background:
- High-intensity laser-plasma interactions require advanced diagnostics.
- Existing x-ray spectrometers often lack high-repetition-rate capabilities.
Purpose of the Study:
- To develop and demonstrate a high-repetition-rate dual-channel x-ray spectrometer.
- To enable detailed x-ray diagnostics in high-intensity laser-plasma experiments.
Main Methods:
- Design of a dual-channel spectrometer utilizing highly oriented pyrolytic graphite (HOPG) crystals.
- Integration of a unique detector plane capable of holding active or passive detectors.
- Testing using COMET and SCARLET high-intensity lasers at LLNL and Ohio State University.
Main Results:
- The spectrometer, HR-DC-HOPG, successfully operates at high repetition rates.
- It resolves two distinct x-ray bands: approximately 7-10 keV and 10-13 keV.
- Performance was validated across varied laser energies, target materials, pulse shapes, and detector types.
Conclusions:
- The developed HR-DC-HOPG spectrometer is a capable diagnostic for high-intensity laser-plasma experiments.
- Its high-repetition-rate capability significantly enhances experimental throughput.
- The flexible detector configuration allows for adaptable measurements.
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