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Cover Picture: Estimated Detonation Velocities for TKX‐50, MAD‐X1, BDNAPM, BTNPM, TKX‐55, and DAAF using the Laser–induced Air Shock from Energetic Materials Technique (Prop., Explos., Pyrotech. 4/2017)
Author(s) -
Gottfried Jennifer L.,
Klapötke Thomas M.,
Witkowski Tomasz G.
Publication year - 2017
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201780401
Subject(s) - detonation , shock wave , cover (algebra) , laser , shock (circulatory) , spectral line , excited state , materials science , atomic physics , analytical chemistry (journal) , chemistry , optics , thermodynamics , physics , explosive material , mechanical engineering , medicine , organic chemistry , engineering , chromatography , astronomy
The cover picture shows the excitation of TKX‐55 and BTNPM with a focused laser pulse and their molecular structures; red = O, blue = N, gray = C, and white = H. Exothermic reactions of the energetic material increase the plasma temperature and a shock wave expands into the air above the sample. The first 3 snapshots from the high‐speed video of the shock wave expansion are shown for each of the samples. The measured shock wave velocities were used to estimate the detonation velocities of the energetic materials. The emission spectra for each of the laser‐excited samples are given on the right side of the picture; these spectra provide insight into the high‐temperature chemical reactions. Details are discussed in the article by Jennifer L. Gottfried et al. on page 353.