Experiment research of fiber probe applied in detonation velocity test

To investigate the response of fiber probe on explosion loading and the response character under impacting action, the detonation experiments of the TNTRDX-Al explosive and the composite B explosive were developed. The 0.063 5 mm fiber probe with concentrating collimation convex in the front-end and the 1 mm fiber probe without concentrating collimation convex were adopted separately to determinate the transmission velocity of the chemical propagating reaction. Both of them could determine the detonation velocity of explosives ～7 000 m/s and the uncertainty of measurement 2%. The fiber reaction signals under shock were recorded using the fiber probe without concentrating collimation convex. And the black-body radiation phenomenon was validated under the high temperature and high pressure produced by strong impact.