Table 1.

FST layering time for CHGT.

of the theoretical efforts have focused on the development of computational models of the IFE target response during FST-formation cycle [1]: fuel filling–fuel layering– target injection. Using the codes allows planning experiments and studying the behavior of these targets in the FST-LM.

Current status of the FST technologies underlies the future research that focuses on the FST-LM prototype development, challenges and advances in IFE target fabrication. We use the CHGT to design a high rep-rate FST-LM and analyze recent experiments with different LCs. Our experiments were made with the mockups of different designs, and the required LC geometry was found. The time-integral performance criterion is that the target residence time tres in the LC must be more than the fuel layering time τform. Figure 6 shows three mockups: mockup 1 M-1 (one-fold spiral), tres = 9.8 0.5 s; mockup 2 M-1 (two-fold spiral), tres = 23.5 1.7 s; mockup 3 M-2 (three-fold spiral), tres = 35.0 2.0 s.

#### Figure 6.

Different LC mockups which are planned to be used in the FST-LM to promote development of effective affordable technology alternatives.

These measurements show that 4-mm targets can be manufactured by the FST layering method using n-fold-spiral LCs at n = 2, 3, because they maintain the gain in time of the target residence in the LC and in fuel layer symmetrization during target rolling. Note that currently only curved LCs in a specialized geometry and moving targets are successful for developing the FST-LM of repeatable operation, which works with a target batch rolling along the LC.

Our latest effort underlies the future research on creation of the FST-LM as a means of a steady-state target-producing device, which is compatible with a noncontact schedule of the target delivery to the reaction chamber.
