In the inertial confinement fusion ICF indirect drive experiment, a plant foam box filled in a metal column cavity can convert cylindrically symmetric laser energy into spherically symmetric X-ray energy mounds, thereby improving the symmetry and uniformity of irradiation.
In a laser-driven plasma physics experiment, a similar plant foam box was used to fill a cylindrical cavity target.
At present, the preparation process of the above experimental targets is complicated, the applicable polymer / solvent system is limited, the foam density is high, and the assembly tolerance of the foam column and the gold-pancreatic column cavity is adversely affecting the ICF experiment.
The use of thermally initiated free radical polymerization of a multi-component acrylate monomer solution in a pre-filled glass capillary tube, combined with CO2 supercritical extraction technology, low-density vegetables can prepare foam boxes with interconnected microporous structures in the capillary tube.
The foam is tightly packed in a cylindrical cavity of several hundred microns and formed in situ.
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