Vacuum Layer Double-Shell Cryogenic Inertial Fusion Targets

摘要

A double-shell cryogenic target has been suggested as a possible design for commercial Inertia Fusion (IF) reactors. Fabrication techniques have been developed to the point where these targets are available for experimental evaluation. Heat transfer from the fuel container to the outer shell is provided by a low-pressure exchange gas between the two shells. The pressure and mass of gas can be controlled by both temperature and the selection of the exchange gas. In the temperature range of interest (10 to 35 exp 0 K) helium, a noncondensable gas, permits only a variation of pressure. A condensable gas, however, allows a variation in both the pressure and the mass density within the gap between the shells. A thermal model has been developed to evaluate the thermal characteristics of candidate target designs and estimate the fuel-layer uniformity history of the target. (ERA citation 06:008690)