Monoenergetic-proton-radiography measurements of implosion dynamics in direct-drive inertial-confinement fusion. - Li CK; Séguin FH; Rygg JR; Frenje JA; Manuel M; Petrasso RD; Betti R; Delettrez J; Knauer JP; Marshall F; Meyerhofer DD; Shvarts D; et al. (Physical review letters, 2008)