Soft X-ray backlighter source driven by a short-pulse laser for pump-probe characterization of warm dense matter

Journal article

Here we propose a pump-probe X-ray absorption spectroscopy temperature measurement technique appropriate for matter having temperature in the range of 10 to a few 100 eV and density up to solid density. Atomic modeling simulations indicate that for various low- to mid-Z materials in this range the energy and optical depth of bound-bound and bound-free absorption features are sensitive to temperature. We discuss sample thickness and tamp layer considerations. A series of experimental investigations was carried out using a range of laser parameters with pulse duration ≤5 ps and various pure and alloyed materials to identify backlighter sources suitable for the technique.

Authors: McGuffey, C; Dozieres, M; Kim, J; Savin, AF; Park, J

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: AIP Publishing
• Journal: Review of Scientific Instruments
• Volume: 89
• Article number: 10F122
• Publication date: 2018-10-16
• Acceptance date: 2018-06-29
• DOI: 10.1063/1.5039419
• EISSN: 1089-7623
• ISSN: 0034-6748
• Subjects: Pump probe experiments; X-rays; Absorption spectroscopy; Alloys; Lasers; Emission spectroscopy