[en] In order to meet the requirement of low density micro-machinable Ch foams in ICF, the fabrication of p-divinylbenzene foams by high internal phase emulsion (HIPE) have been introduced. The fabrication conditions were discussed, such as initiator, emulsifier, ratio of styrene and inorganic additive. Then the optimum formula was obtained. Characterization results of different density foams indicate that there are two different porous structures in foams: cells and wall holes. The cells have the diameter of 1 ∼ 10 μm, and wall holes have the diameter of 0.2 ∼ 2.0 μm, When the density of foams is 50 mg/ cm³, the elastic module of foams is about 5 MPa, By the microfabrication, the foams with the density over 50 mg/cm³ could be machined to cylindrical and sliced targets used in ICF, whose minimum size can run up to 100 μm. (authors)

[en] Modulation surfaces with micro-scaled sinusoidal fluctuation were fabricated utilizing ultra-precision turning techniques. Problems concerning key techniques including needle tip diamond tool sharpening and tool centering were solved. The relations between the copper mould surface roughness and main cutting parameters, based on feed rate, depth of cut and spindle speed, were investigated. Sinusoidal surfaces with of 20-150 μm and amplitudes of 0.2-20 μm were developed, and the dimension- al tolerances are ±0.5 μm and ±0.1 μm, respectively. Atomic force microscope measurement shows that the RMS surface roughness in a 20 μm X 20 μm area is less than 10 nm. The profile error was assessed by using, the least squares optimization algorithm. Power spectrum analyses of the developed sinusoidal surfaces demonstrate the precise copy of sinusoidal fluctuation from the copper mould surface to the target. (authors)

[en] The Au/Gd multilayer films were prepared by magnetron sputtering. The effects of the technique parameters on the structure and properties of Au/Gd multilayer films were studied. The results show that the deposition rates of Au and Gd films decrease with increase of the sputtering pressure. At low pressure, the RMS roughnesses of Au and Gd films decrease with decrease of the sputtering pressure. The period structures of Au/Gd multilayer films are clearer at lower sputtering power. Based on the preparations of Au/Gd multilayer films, the Au/Gd hohlraum were fabricated. The effects of Au/Gd ratio on the mechanical properties of the Au/Gd hohlraum were investigated. (authors)

[en] According to the requirement of the ICF experiments, the vacuum diffusion bonding of the aluminum and copper films were studied in high temperature circumstances (250 degree C). The microstructures of the joint and surface roughness are analyzed by means of SEM, XRD and an alpha-step device. The results show that the force among atoms, metallurgy combination and interface reaction are important to obtain the high quality joint of the aluminum and copper films

[en] By comparing the chemical component and machined performance of two kinds of 1100 Al rod, the higher purity one is chosen for Al mandrel. Al mandrel is prepared by diamond turning machine with a surface roughness less than 20 nm (RMS) and Al/Cu hybrid mandrel is explored by depositing a 5 μm thick copper layer on Al mandrel via magnetron sputtering deposition. The surface roughness, thickness uniformity and crystallinity of Cu film are analyzed by white light interferometer, XRD. The results show that the prepared Cu film with surface roughness less than 30 nm (RMS), thickness uniformity more than 95%, and cylindricity less than 1 μm appears (111) preferential orientation growth. The interfacial bonding strength between Cu film and substrate is strong enough for depositing 11 μm thick hohlraum wall containing depleted uranium (DU). (authors)

[en] Turning procedure is one of the key production procedures in golden hohlraum. There are four key parameters of golden hohlraum including the diameter, the length, the rear and front laser entrances in the turning procedure whose stability and production quality determine the final quality of the golden hohlraum. It is necessary to strictly control the process of the turning procedure. In this paper, A Bayesian method for constructing production quality control model was discussed at the condition of small batch and sample. A production quality control model for turning procedure was established with large batch of history production data and small batch of current production data. The model was validated by one batch of production data. The results showed that the turning procedure was a stability production process. There was no quality alarm generated from the quality control model. It is believed that the quality control model is correct and able to supervise the actual golden hohlraum fabricating process. (authors)

[en] The silica alco-gel was obtained by the 2-step acid-base catalyzed TEOS. Aging in a solution of methyltrimethoxylsilane and trimethylating Si-OH groups increased the strength and stiffness of the wet gel by hexamethyldisilazane (HMDSA) on the surface of silica matrix. The modified silica aerogel was obtained by CO₂ supercritical drying method. The bulk densities of aerogels were between 30-100 mg/cm³. FTIR and some other experiment methods were used to investigate the structure and hydrophobic properties. The experiment results showed that the aerogel possessed perfect size-stability and hydrophobic properties. The aerogel micro-cylinder for ICF targets was manufactured by lathe machine. (authors)

[en] The silica alco-gel was obtained by the 2-step acid-base catalyzed TEOS. Aging in a solution of tetraethoxylsilane and trimethylating Si-OH groups increases the strength and stiffness of the wet gel due to the hexanethyldisilazane (HMDSA) on the surface of silica matrix. The modified silica aerogels were obtained by CO₂ supercritical drying method. The bulk density of aerogels is in the range of 30-100 mg/cm³. FTIR and some other methods were used to investigate the structure and hydrophobic properties. The results show that the aerogel possesses perfect size-stability and hydrophobic properties. The aerogel micro-cylinder for inertial confinement fusion targets were manufactured by lathe machine. (authors)

[en] The Al target in ICF experiment was produced by single point diamond turning technology. The effect of turning process on the surface roughness of Al target was discussed. The experiment results have demonstrated that lower surface roughness of Al target can be fabricated with smaller feed speed and higher spindle rotate speed. The surface roughness was analyzed by means of Form Talysurf device. The result showed that the surface roughness of the aluminum target was less than 50 nm. (authors)

[en] By using vacuum diffusion bonding process, the microstructure and performance of diffusion transition zone for the Al/Cu films diffusion bonding joint were researched by means of SEM and XRD. The results indicate that under the condition of heating temperature 250 degree, holding time 30 min and pressure force 5 MPa, diffusion interface is produced between copper and aluminum, the width of the diffusion transition zone is less than 150 nm. (authors)