Critical diameter for and fluctuations in detonation of solutions of dinitrotoluene in nitroglycol

The critical detonation diameters of nitroglycol and solutions of dinitrotoluene in nitroglycol in paper shells are measured. The frequency of the detonation fluctuations is determined. Data with glass and paper shells are the same. The frequency of the fluctuations is independent of the concentration of the solution at $\approx$7 MHz. The detonation parameters of these solutions are compared with systems which detonate in a low-frequency ($\approx$2 MHz) spin regime. When the dinitrotoluene content of the solution is $\le$15%, the critical detonation diameter is constant and equal to that for nitroglycol, but as the dinitrotoluene concentration is raised, the critical detonation diameter increases. The experimental results are in good agreement with theory.