must be met for that approach to be viable. If these objectives cannot be met, then other approaches will need to be considered.

The approach used in the High Average Power Laser (HAPL) program (see Chapter 1) was one in which all the potential feasibility issues of the entire IFE system were studied, and then the most important ones were addressed to try to find basic solutions. It is a good example of how a national IFE program might be structured.


The main high-level conclusions and recommendations from this chapter are given below.


Conclusion 3-1: Technology issues—for example, chamber materials damage and target fabrication and injection—can have major impacts on the basic feasibility and attractiveness of IFE and thus on the direction of IFE development.

Conclusion 3-2: At this time, there appear to be no insurmountable fusion technology barriers to realizing the components of an IFE system, although knowledge gaps and large performance uncertainties remain, including those surrounding the performance of the system as a whole.

Conclusion 3-3: Significant IFE technology research and engineering efforts are required to identify and develop solutions for critical technology issues and systems such as targets and target systems; reaction chambers (first wall/blanket/shield); materials development; tritium production, recovery and management systems; environment and safety protection systems; and economic analysis.


Recommendation 3-1: Fusion technology development should be an important part of a national IFE program to supplement research in IFE science and engineering.

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