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Design and simulation of multilayer coatings for a multi-channel Wolter-like x-ray imager with large field of view and high resolution
Abstract
X-ray diagnostics are key instruments for understanding the physics behind inertial confinement fusion experiments. We report on the multilayer design optimization for the Toroidal X-ray Imager (TXI), a hard x-rays microscope instrument designed by Commissariat à l’énergie atomique (CEA) and Laboratoire Charles Fabry (LCF) to be installed on the National Ignition Facility. TXI includes six channels designed for three different energy bands centered on 8.7, 13, and 17.5 keV. Each channel is made up of two toroidal mirrors arranged in a Wolter-like configuration. The required field of view is 800 × 400 µm2, and the resolution should be better than 5 µm. In addition, we seek to estimate the spatial distribution of the temperature, which requires no spectral overlap of the different energy bands and a good spectral homogeneity of the image produced. The development of the multilayer coatings was performed in a two-step method. First, the coatings were optimized to obtain proper energy bands. Then, an x-ray tracing code was used to calculate the integrated optical response of each channel and adjust the response of the mirror to fulfill the requirements. To fulfill all the specifications, we propose an original design using a combination of two aperiodic coatings, one withmore »
- Authors:
-
[1];
[1];
[2];
[3];
[3];
[1]
- University Paris-Saclay, Palaiseau (France)
- Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 2212854
- Report Number(s):
- LLNL-JRNL-851628
Journal ID: ISSN 0034-6748; 1077394
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 10; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- hard x-rays; optical properties; x-ray diagnostics; x-ray imaging
Citation Formats
Ravinet, N., Meltchakov, E., Lejars, A., Troussel, Ph, Do, A., Kozioziemski, B., and Delmotte, F. Design and simulation of multilayer coatings for a multi-channel Wolter-like x-ray imager with large field of view and high resolution. United States: N. p., 2023.
Web. doi:10.1063/5.0165414.
Ravinet, N., Meltchakov, E., Lejars, A., Troussel, Ph, Do, A., Kozioziemski, B., & Delmotte, F. Design and simulation of multilayer coatings for a multi-channel Wolter-like x-ray imager with large field of view and high resolution. United States. https://doi.org/10.1063/5.0165414
Ravinet, N., Meltchakov, E., Lejars, A., Troussel, Ph, Do, A., Kozioziemski, B., and Delmotte, F. Tue .
"Design and simulation of multilayer coatings for a multi-channel Wolter-like x-ray imager with large field of view and high resolution". United States. https://doi.org/10.1063/5.0165414.
@article{osti_2212854,
title = {Design and simulation of multilayer coatings for a multi-channel Wolter-like x-ray imager with large field of view and high resolution},
author = {Ravinet, N. and Meltchakov, E. and Lejars, A. and Troussel, Ph and Do, A. and Kozioziemski, B. and Delmotte, F.},
abstractNote = {X-ray diagnostics are key instruments for understanding the physics behind inertial confinement fusion experiments. We report on the multilayer design optimization for the Toroidal X-ray Imager (TXI), a hard x-rays microscope instrument designed by Commissariat à l’énergie atomique (CEA) and Laboratoire Charles Fabry (LCF) to be installed on the National Ignition Facility. TXI includes six channels designed for three different energy bands centered on 8.7, 13, and 17.5 keV. Each channel is made up of two toroidal mirrors arranged in a Wolter-like configuration. The required field of view is 800 × 400 µm2, and the resolution should be better than 5 µm. In addition, we seek to estimate the spatial distribution of the temperature, which requires no spectral overlap of the different energy bands and a good spectral homogeneity of the image produced. The development of the multilayer coatings was performed in a two-step method. First, the coatings were optimized to obtain proper energy bands. Then, an x-ray tracing code was used to calculate the integrated optical response of each channel and adjust the response of the mirror to fulfill the requirements. To fulfill all the specifications, we propose an original design using a combination of two aperiodic coatings, one with a narrow bandwidth and the other one with a larger bandwidth.},
doi = {10.1063/5.0165414},
journal = {Review of Scientific Instruments},
number = 10,
volume = 94,
place = {United States},
year = {Tue Oct 03 00:00:00 EDT 2023},
month = {Tue Oct 03 00:00:00 EDT 2023}
}
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