The Development of a CARS (Coherent Anti-Stokes Raman Spectroscopy) System for the Study of Muzzle Flash.
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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The feasibility of using Coherent Anti-Stokes Raman Spectroscopy CARS top study the pheonomenon of muzzle flash is assessed. The experiment reported here consisted of firing a modified M-14 rifle into a large metal box purged with nitrogen while probing the resulting flow field with spark shadowgraphs, a He-Ne laser and colinear laser beams used for CARS signal generation from carbon monoxide. Results of the light transmission experiments indicate the times and positions in the muzzle flow field where CARS may be used to obtain temperature measurements. Both narrow-band and broad band CO CARS signals were generated at an axial location 7.5 cm downstream of the barrel exit at times of 1.0, 2.0, and 3.0 milliseconds after bullet exit. These signals appear sufficiently large for determining spatially and temporally resolved temperatures. The direction of future muzzle flash temperature studies is also given.
- Atomic and Molecular Physics and Spectroscopy