title: Direct observation of the phenomenology of a solid thermal explosion using time-resolved proton radiography.
abstract: We present a new phenomenology for burn propagation inside a thermal explosion based on dynamic radiography. Radiographic images were obtained of an aluminum cased solid cylindrical sample of a plastic bonded formulation of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine. The phenomenology observed is ignition followed by cracking in the solid accompanied by the propagation of a radially symmetric front of increasing proton transmission. This is followed by a further increase in transmission through the sample, ending after approximately 100 micros. We show that these processes are consistent with the propagation of a convective burn front followed by consumption of the remaining solid by conductive particle burning.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: L
authors.initials: L
authors.lastname: Smilowitz
authors.forename: B F
authors.initials: BF
authors.lastname: Henson
authors.forename: J J
authors.initials: JJ
authors.lastname: Romero
authors.forename: B W
authors.initials: BW
authors.lastname: Asay
authors.forename: C L
authors.initials: CL
authors.lastname: Schwartz
authors.forename: A
authors.initials: A
authors.lastname: Saunders
authors.forename: F E
authors.initials: FE
authors.lastname: Merrill
authors.forename: C L
authors.initials: CL
authors.lastname: Morris
authors.forename: K
authors.initials: K
authors.lastname: Kwiatkowski
authors.forename: G
authors.initials: G
authors.lastname: Hogan
authors.forename: P
authors.initials: P
authors.lastname: Nedrow
authors.forename: M M
authors.initials: MM
authors.lastname: Murray
authors.forename: T N
authors.initials: TN
authors.lastname: Thompson
authors.forename: W
authors.initials: W
authors.lastname: McNeil
authors.forename: P
authors.initials: P
authors.lastname: Rightley
authors.forename: M
authors.initials: M
authors.lastname: Marr-Lyon