title: Radiative heating of plastic-tamped aluminum foil by x rays from a foam-buffered hohlraum.
abstract: The time dependence of the x-ray absorption of aluminum samples heated with intense radiation sources from a foam-buffered gold hohlraum has been studied in this work. Hydrodynamic simulations were used to illustrate the plasma conditions in the plastic-tamped aluminum foils contained in this type of hohlraum. Experiments were conducted to measure the K -shell x-ray absorption spectra of the aluminum sample. With densities taken from the hydrodynamic simulations, electron temperatures were then inferred by fitting the measured absorption spectra with detailed-term-accounting calculations. The inferred temperatures have a maximum of about 93eV and were found to agree within 25% with the simulated results at times after 1ns , indicating that the use of foam shields, together with a compact cavity, has created a clean and high-temperature radiation source preferable to opacity measurements.
authors.affiliation: Research Center of Laser Fusion, P. O. Box 919-986, Mianyang 621900, China.
authors.forename: Jiyan
authors.initials: J
authors.lastname: Zhang
authors.forename: Jiamin
authors.initials: J
authors.lastname: Yang
authors.forename: Yan
authors.initials: Y
authors.lastname: Xu
authors.forename: Guohong
authors.initials: G
authors.lastname: Yang
authors.forename: Yaonan
authors.initials: Y
authors.lastname: Ding
authors.forename: Jun
authors.initials: J
authors.lastname: Yan
authors.forename: Jianmin
authors.initials: J
authors.lastname: Yuan
authors.forename: Yongkun
authors.initials: Y
authors.lastname: Ding
authors.forename: Zhijian
authors.initials: Z
authors.lastname: Zheng
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhao
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Hu