红外光谱已经成为浮选药剂作用机理研究的最重要手段之一。 由于矿物本身具有较强的红外吸收, 传统溴化钾压片透射光谱很难检测到矿物表面吸附药剂的微弱红外信号。 采用显微-傅里叶变换红外光谱仪的反射模式, 测定了不同浓度油酸钠在胶磷矿表面的吸附形式, 并观察了吸附形貌。 结果表明, 与透射红外光谱相比, 反射红外光谱对表面有更高的灵敏度, 能更好地揭示实际浮选药剂浓度下的吸附机理。 碱性条件下当油酸钠浓度较低时, 油酸离子与表面晶格钙离子发生化学吸附, 吸收峰在1 552 cm-1, 同时也存在油酸钙沉淀的物理吸附, 吸收峰在1 570和1 535 cm-1; 当油酸钠浓度超过临界胶束浓度时, 胶束使得胶磷矿表面亲水, 导致油酸钠溶液残留在表面, 吸收峰在1 560 cm-1, 掩盖了其他吸收峰; 表面经水洗涤后药剂吸收峰强度大幅减弱, 是由于残留的油酸钠和物理吸附的油酸钙被洗掉。 另外, 随着油酸钠浓度增大, 药剂二维形貌由点状吸附聚集为片状吸附, 覆盖面积增大, 但并不是完全覆盖, 这与矿物表面异质性有关。 以上研究结果有利于理解磷矿石提磷或铁矿石脱磷浮选体系中捕收剂与胶磷矿的作用机理。

An experimental research platform is built on Shenguang II high power laser facility for obtaining the equation of state of liquid deuterium which has ability to control the temperature in a range of 12–300 K with an accuracy of ±0.03 K in 80 min. By optimizing the coating processing and cleaning the target, we solve the problems that the residual reflection is too high and serious frosting takes place on the window of the target at low temperature, then we obtain the experimental image with a good signal-to-noise ratio. By using the impedance matching method and velocity interferometer system for any reflector, experimental Hugoniot data of liquid deuterium are obtained at a pressure of about 60 GPa under the output condition of 3ω, 3 ns, 1200 J on Shenguang II high power laser, which agrees well with the other published data in the same pressure regime and provides a good foundation for the next experimental study of liquid deuterium equation in 100 GPa pressure regime.

The coupling efficiency of short-pulse ignition laser energy to hot-spot internal energy directly affects the feasibility of fast ignition. Experimental characterization of the hot spot has attracted much attention. Among temperature, density and neutron yield of fast ignition experiments, the temperature of the hot spot has few available diagnostic methods. Multispectral X-ray imaging of hot-spot continuum emission is expected to give the time evolution of the electron temperature distribution. This article describes electron temperature determination from multispectral imaging, a dual-channel X-ray Kirkpatrick-Baez (KB) microscope designed for two-spectral imaging, and the experimental results of hot-core multispectral imaging of an imploded cone-shell target at the SG-II laser facility.

A joint diagnostic system was established for the diagnosis of laser-driven shock wave experiments. The system has high temporal resolution (time resolution ～12 ps) and high spatial resolution (spatial resolution ～7 μm) and fits for diagnostics of the experiment with small sample size and short time physical process. The joint diagnostic system was applied for shock wave measurement on the Shenguang-II laser facility. The passive shock breakout signal and active diagnostic signal were simultaneously obtained. The temporal measurement reliability of the system was verified using a multi-layered target. The experimental results show that the two measurement results were consistent.

The supersonic jets and the interaction of strong shock waves are ubiquitous features of the nonlinear hydrodynamics of inertial-confinement fusion, astrophysic, and related fields of high energy-density science, so very important value have their studies in laboratory. A laboratories experimental study on jets is reported. The plasma jets were created by an ns laser pulse irradiating a special circular hole target, and the shadow of jets were recorded by using an X-ray laser probe with wavelength of 13.9 nm. Legible shadow images of plasma jets were obtained. The experimental results and theoretical simulation were in qualitative agreement.

The fabrication and measurement of isentropic release targets were described. The Al，Au，Ag、Cu and Zn thin foils were cut to hundred micron by apparatus of laser. They are fabricated to isentropic release targets using in the laser equation of state experiments by the assembly. The parameters of targets were measured by NT1100 profiling system. The isentropic release targets were used in "SG II" experiments and good images were obtained.