Thermal stability of cryogenic targets in laser experiments

The problem of cryogenic target disruption in the laser thermonuclear synthesis chamber is under discussion. Estimates of target lifetime in the chamber are performed. When estimating target lifetime in a vacuum chamber with warm walls, it is necessary to consider a possibility of target disruption both at the expense of crystal growth in a DT-layer and increase of gas mass in a target center during heating. The lifetime in a chamber with Tsub(st)=300 K constitutes 0.034-0.7 s for two-layer cryogenic targets with fuel mass 3-40 μg