title: A line-imaging velocity interferometer technique for shock diagnostics without x-ray preheat limitation.
abstract: A study was conducted with a line-imaging velocity interferometer on sandwich targets at the Shen Guang-III prototype laser facility in China, with the goal of eliminating the preheat effect. A sandwich target structure was used to reduce the x-ray preheat limitation (radiation temperature ~170 eV) in a radiative drive shock experiment. With a thick ablator, the preheat effect appeared before the shock arrived at the window. After adding a shield layer of high-Z material on the ablator, x-rays which penetrated the ablator were so weak that the blank-out effect could not be measured. This experiment indicates that the sandwich target may provide a valuable technique in experiments such as equation of state and shock timing for inertial confinement fusion studies.
authors: Research Center of Laser Fusion, CAEP, Mianyang 621900, China.
authors: Feng
authors: F
authors: Wang
authors: Xiaoshi
authors: X
authors: Peng
authors: Shenye
authors: S
authors: Liu
authors: Tao
authors: T
authors: Xu
authors: Lusheng
authors: L
authors: Mei
authors: Xiaohua
authors: X
authors: Jiang
authors: Yongkun
authors: Y
authors: Ding