Would you settle for 7 Phds?
That's what Dr Mazanek and his team have, and they did the work - and if you want to argue it with them, go on ahead. BTW, that Dr Mazanek is the same one who went ballistic when the first Columbia foam strike reports came in...
How it works is that the lasers vaporize the surface of the impactor, thus using its own mass as fuel for a jet reaction to change its course.
I knew that the "H" in SSHCL stands for heat - but it is also a high capacity laser as well.
ep