Diagnosing the fast-heating process of the double-cone ignition scheme with x-ray spectroscopy

Abstract

In the double-cone ignition scheme of inertial confinement fusion, the head-on collision of two compressed fuel jets from the cone-tips forms an isochoric plasma, which is then heated suddenly by an MeV relativistic electron beam produced by ultra-intense picosecond laser pulses. This fast-heating process was studied experimentally at the Shenguang II upgrade laser facility. By observing temporal resolved x-ray emission and spatial resolved x-ray spectrum, the colliding process and heating process are carefully

The effect of high-Z dopant on the ablation of carbon–hydrogen polymer target

“…Except for above mentioned high-Z dopants, other dopants such as chlorine (Cl) [17,[20][21][22][23], germanium (Ge) [24][25][26][27][28], silicon (Si) [29], titanium (Ti) [30,31], iodine (I) [32] are also used. For their excellent performance in preventing hot electron preheating, mitigating hydrodynamic instability and facilitating target diagnosis, high-Z dopant has been a widely used method in ICF target design.…”

“…In this paper, we choose Cl as a dopant with the guidance of previous DCI studies [17,[20][21][22]. The impact of high-Z dopant in planar CH targets on the ablation characteristic parameters is investigated through radiation hydrodynamic simulations, including the laser absorption rate, the temperature, the ablation pressure and the mass ablation rate.…”