Speaker
Dr
Xiaoshan He
(Research Center of Laser Fusion, China Academy of Engineering Physics)
Description
The glow discharge polymer (GDP) shells are used as the ablators for inertial confinement fusion (ICF) targets. In order to avoid the preheat of DT by high energetic X rays, the shells have to be doped with a small quantity of high Z material. The doped GDP shells are fabricated exclusively by plasma polymerization technology, which is well known today and largely used. But the shells for laser fusion targets have many stringent characteristics. Although this process of coating shells has been done for years, there is still need for the reaearch to prepare GDP shells meeting all the specifications. An investigation of the chemical structure, surface morphology, and doped concentration of GDP shells is described. The experimental results have shown that 1 at% to 5 at% silicon concentration and 1 at% to 3 at% germanium was attained, respectively. Besides, the gas-phase analysis and the characterization of the GDP plasma were obtained by the Quadrupole Mass Spectrometer (QMS) and Langmuir probe during the deposition process. The results have shown that the rf power significantly affected the carbon bonds, microstructures and surface roughness of the GDP shells. By adjusting the rf powers, the structures were modified, and in some case, the surface roughness decreased dramatically.
Primary authors
Dr
Guo Chen
(Research Center of Laser Fusion, China Academy of Engineering Physics)
Dr
Xiaoshan He
(Research Center of Laser Fusion, China Academy of Engineering Physics)
Co-authors
Mr
Jun Li
(Research Center of Laser Fusion, China Academy of Engineering Physics)
Dr
Zhibing He
(Research Center of Laser Fusion, China Academy of Engineering Physics)