Abstract
This paper introduces a liquid helium (LHe) cryogenic target, developed at the Technical Institute of Physics and Chemistry, which has a separated vacuum interval and a gas cooled shield for heat insulation. The target can work in a poor vacuum (∼100 Pa) container with the target plate directly facing the room temperature surface of the shock system. By using continuous flow liquid helium and an exhausting pump to decrease the back pressure in the liquid helium reservoir, the temperature in the target sample cabin has reached 3.6 K and can be adjusted to any point between 3.6 K and 80 K with temperature stability better than ±0.2 K. In the target, an adhesive was used for cryogenic seal between different materials and has been proven to be reliable with special seal structural design. This cryogenic target can be used for shock compression experiments of helium and other gas substances. After shock compression testing, all the cryogenic system parts except the main target body can be re‐used. The test apparatus for the target tests and shock compression experiments is also introduced in the paper.
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