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X-ray imaging with grazing-incidence microscopes developed for the LIL program
R Rosch1, J Y Boutin, J P le Breton
1Commissariat á l'Energie Atomique/DIF, BP 12, 91680 Bruyères-Le-Châtel, France.
The Review of Scientific Instruments
|April 7, 2007
Summary
New grazing-incidence x-ray microscopes were developed for laser-plasma experiments. These advanced diagnostics provide high-resolution imaging for inertial confinement fusion research, enabling detailed study of laser-driven phenomena.
Area of Science:
- Plasma Physics
- X-ray Optics
- Fusion Energy Research
Background:
- The Ligne d'Integration Laser (LIL) facility requires advanced diagnostics for inertial confinement fusion (ICF) experiments.
- Anticipated x-ray ablation issues on the future Laser MégaJoule (LMJ) facility necessitate specialized imaging systems with large target-to-microscope distances.
Purpose of the Study:
- To describe the design and testing of grazing-incidence x-ray microscopes for ICF research.
- To develop diagnostics capable of high-resolution, time-resolved x-ray imaging of laser-produced plasmas.
Main Methods:
- Development of four x-ray microscopes: two Kirkpatrick-Baez (KB) and two toroidal/spherical (T/S) designs.
- Utilizing custom-built framing and streak cameras for time-resolved imaging with ~80 ps resolution.
- Testing microscopes on a dc x-ray tube and subsequently on the LIL facility.
Main Results:
- Soft x-ray KB microscope: <30 microm resolution, sensitive below 1 keV.
- Hard x-ray KB microscope: 10 microm resolution, sensitive in the 1-5 keV range.
- T/S microscopes: <30 microm resolution, sensitive in 0.1-1 keV and 1-5 keV ranges, with 3 mm field of view.
Conclusions:
- The developed x-ray microscopes were successfully implemented in early LIL experiments.
- These diagnostics provide crucial high-resolution imaging capabilities for studying laser-plasma interactions and ICF physics.
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