Analytical criterion for shock ignition of fusion reaction in hot spot X. Ribeyre, V.T. Tikhonchuk, J. Breil, M. Lafon, A. Vallet and E. Le Bel EPJ Web of Conferences, 59 (2013) 03005 Published online: 15 November 2013 DOI: 10.1051/epjconf/20135903005