High-resolution X-ray flash radiography of Ti characteristic lines with a multilayer Kirkpatrick-Baez microscope was developed on the Shenguang-Ⅱ(SG-Ⅱ)Update laser facility.The microscope uses an optimized multilaye...High-resolution X-ray flash radiography of Ti characteristic lines with a multilayer Kirkpatrick-Baez microscope was developed on the Shenguang-Ⅱ(SG-Ⅱ)Update laser facility.The microscope uses an optimized multilayer design of Co/C and W/C stacks to obtain a high reflection efficiency of the Ti characteristic lines while meeting the precise alignment requirement at the Cu Kα line.The alignment method based on dual simulated balls was proposed herein,which simultaneously realizes an accurate indication of the center field of view and the backlighter position.The optical design,multilayer coatings,and alignment method of the microscope and the experimental result of Ti flash radiography of the Au-coned CH shell target on the SG-Ⅱ Update are described.展开更多
A self-magnetic pinch diode （SMPD） integrating an anode foil-reinforced electron beam pinch focus and a small high-dose x-ray spot output was designed and optimized. An x-ray focal spot measuring system was develope...A self-magnetic pinch diode （SMPD） integrating an anode foil-reinforced electron beam pinch focus and a small high-dose x-ray spot output was designed and optimized. An x-ray focal spot measuring system was developed in accordance with the principle of pinhole imaging. The designed SMPD and the corresponding measuring system were tested under ~MV, with 1.75 ~ 2 mm2 oval x-ray spots （AWE defined） and forward directed dose 1.6 rad at 1 m. Results confirmed that the anode foil can significantly strengthen the electron beam pinch focus, and the local spot measuring system can collect clear focal spot images. This finding indicated that the principle and method are feasible.展开更多
The rod-pinch diode(RPD)is a kind of new X-ray source for flash radiographic apphcations,especially in the small-scale hydrodynamic experiments.According to theoretical analysis and the generator parameters,the 1MV ro...The rod-pinch diode(RPD)is a kind of new X-ray source for flash radiographic apphcations,especially in the small-scale hydrodynamic experiments.According to theoretical analysis and the generator parameters,the 1MV rod pinch diode has been designed and studied experimentally.As a result,1.21 to 1.45rads at 1m in the forward direction (0°)are achieved in 18.1 to 27.5ns FWHM pulses,the spot sizes are 0.8 to 1.1mm with 1-mm-diameter tungsten rods. This suggests that the rod-pinch diode is a perfect X-ray source used in the small-scale hydrodynamic experiments.展开更多
基金supported by the National Natural Science Foundation of China(No.11805212)National Key Research and Development Program of China(No.2019YFE03080200)Fundamental Research Funds for the Central Universities(No.22120200405)。
文摘High-resolution X-ray flash radiography of Ti characteristic lines with a multilayer Kirkpatrick-Baez microscope was developed on the Shenguang-Ⅱ(SG-Ⅱ)Update laser facility.The microscope uses an optimized multilayer design of Co/C and W/C stacks to obtain a high reflection efficiency of the Ti characteristic lines while meeting the precise alignment requirement at the Cu Kα line.The alignment method based on dual simulated balls was proposed herein,which simultaneously realizes an accurate indication of the center field of view and the backlighter position.The optical design,multilayer coatings,and alignment method of the microscope and the experimental result of Ti flash radiography of the Au-coned CH shell target on the SG-Ⅱ Update are described.
基金supported by National Natural Science Foundation of China (Grant Nos. 11305128 and 11505142)the State Key Laboratory of Intense Pulsed Radiation Simulation and Effect (Grant No. SKLIPR.1503)
文摘A self-magnetic pinch diode （SMPD） integrating an anode foil-reinforced electron beam pinch focus and a small high-dose x-ray spot output was designed and optimized. An x-ray focal spot measuring system was developed in accordance with the principle of pinhole imaging. The designed SMPD and the corresponding measuring system were tested under ~MV, with 1.75 ~ 2 mm2 oval x-ray spots （AWE defined） and forward directed dose 1.6 rad at 1 m. Results confirmed that the anode foil can significantly strengthen the electron beam pinch focus, and the local spot measuring system can collect clear focal spot images. This finding indicated that the principle and method are feasible.
文摘The rod-pinch diode(RPD)is a kind of new X-ray source for flash radiographic apphcations,especially in the small-scale hydrodynamic experiments.According to theoretical analysis and the generator parameters,the 1MV rod pinch diode has been designed and studied experimentally.As a result,1.21 to 1.45rads at 1m in the forward direction (0°)are achieved in 18.1 to 27.5ns FWHM pulses,the spot sizes are 0.8 to 1.1mm with 1-mm-diameter tungsten rods. This suggests that the rod-pinch diode is a perfect X-ray source used in the small-scale hydrodynamic experiments.
