Shock initiation of the {TATB} based explosive {PBX} 9502 heated to $\sim$ 76$^{\circ}${C}

Recently we reported on shock initiation of PBX 9502 (95 wt.\% tri-amino-trinitro-benzene, 5 wt.\% Kel-F800 binder) cooled to -55$^{\circ}$C (J. Appl. Phys., 112, 74909 (2012)) and to 77K (J. Phys.: Conf. Ser. 500, 182014 (2014)) Shock waves were generated by gas-gun driven plate impacts and reactive flow in the cooled PBX 9502 was measured with embedded electromagnetic gauges. Here we use similar methods to warm the explosive to $\sim$ 76$^{\circ}$C. The explosive sample is heated by warm air flowing through channels in an aluminum sample mounting plate and a copper tubing coil surrounding the sample. Temperature in the sample is monitored using six type-E thermocouples. Results show increased shock sensitivity; time and distance to detonation onset vs. initial shock pressure are shorter than when the sample is initially at ambient temperature. Our results are consistent with those reported by Dallman \& Wackerle (10$^{th}$ Int. Det. Symp., 130 (1993)). Particle velocity wave profiles were also obtained during the shock-to-detonation transition and will be presented.