I'm looking for a paper, or much more likely a small part of a large report, by the National Academy of Sciences from around 2013 on the topic of fusion. The report mentions the fast ignition approach and that they did not see this as a practical approach. Does anyone have a pointer? That's literally all I have to go on.
Ahhh, further Googling turned it up:
CONCLUSION 4-5: At this time, fast ignition appears to be a less promising approach for IFE than other ignition concepts.