High-resolution x-ray imaging diagnostics play a crucial role in fundamental research, such as inertial confinement fusion (ICF) and high-energy density physics (HEDP). Plasma signals are typically characterized by small scales, rapid evolution, and spectral complexity. These characteristics make it essential to develop x-ray diagnostics optics with high spatial resolution, collection efficiency, and spectral resolution. These requirements can be met using a combination of a high-resolution multi-channel Kirkpatrick–Baez (KB) microscope with spectrum-resolved multilayers and a time-resolved framing camera. This study describes the optical and multilayer design of a dual-energy sixteen-channel KB microscope. The calibrated results of online and offline imaging are shown. By utilizing a dual-energy multi-channel KB microscope, high-resolution backlighting and self-emission x-ray imaging can be realized and detailed information related to plasma density and temperature can be simultaneously obtained.
A collision of supersonic jets in the double-cone ignition scheme was experimentally realized. With a very high deceleration, the supersonic jets merge into a high density plasma core, which will be further fast heated to ignition condition. Both the density and temperature of the plasma core is increased with a nearly 100% conversion from the kinetic energy of the jets to the internal energy. Multiple diagnostics are applied to characterize the plasma including an X-ray Thomson scattering, a hard X-ray monochromatic backlighting, an X-ray streak imaging and a framing imaging devices. The density of the supersonic jet is about 5.5~8 g/cm<sup>3</sup>. During the colliding, a stagnation phase lasts about 200 ps, and the maximum density of the plasma core is increased to 46±24 g/cm<sup>3</sup>. By analyzing the velocity and temperature before and after colliding, it is found 90% of the kinetic energy has converted into thermal one.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.