X-ray source development for EXAFS measurements on the National Ignition Facility
Extended X-ray absorption Fine Structure (EXAFS) measurements require a bright, spectrally smooth, and broad-band x-ray source. In a laser facility, such an x-ray source can be generated by a laser-driven capsule implosion. In order to optimize the x-ray emission, different capsule types and laser i...
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Veröffentlicht in: | Review of scientific instruments 2017-08, Vol.88 (8), p.083907-083907 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Extended X-ray absorption Fine Structure (EXAFS) measurements require a bright, spectrally smooth, and broad-band x-ray source. In a laser facility, such an x-ray source can be generated by a laser-driven capsule implosion. In order to optimize the x-ray emission, different capsule types and laser irradiations have been tested at the National Ignition Facility (NIF). A crystal spectrometer is used to disperse the x-rays and high efficiency image plate detectors are used to measure the absorption spectra in transmission geometry. EXAFS measurements at the K-edge of iron at ambient conditions have been obtained for the first time on the NIF laser, and the requirements for optimization have been established. |
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ISSN: | 0034-6748 1089-7623 |
DOI: | 10.1063/1.4999649 |