| Description |
Electrical conduction measurements in detonation waves of gaseous explosives. I were made in a 4.64.inch O.D.I, 1 'inch LD. steel shot tube. Measurements were carried out with the gas mixtures 2H2-0?-+<>.1%N2, lHa-02-N2 and 2CO-02· Using a d04bie probe techniq4e the effect of pressure on the ion density was stu4ied up to 5,000 psi (340 atm) final pressure. By comparing the measured values of e1eotron:density with the theoreti.ca1 resu1 is based on Saha's equation, sudden shift exceeding the theoretical. value appears at 20 and 50 atm final pressure, respecttve1y, for the 2H2 -02+O.ioN2 and 2H2 - .02 N2 C)lS mlxtures. This deviation Lncrease s until at 5,000 psi final pressure where the experiQ1enta electron density is 10 times larger than the theoretical va1e. This sudden shift was ,absent in the 2CO·-.02 system, although a smaller deviation also was observed. Calibration of the double probe technique was studied by means of conducting copper salt solutions. However, the .exact calibration factor was determine.d.by assuming agreement t between theory and experiment s .a t low pressures, which .ha s been condemned by sever a I Lnve.st Legatos . Two explanations for the excess ionization encountered with increased: pressure have been advanced. The first attribute the effect to increased prominence of H30+ formation as pressure is increased. The second exp1anat:J.on can/be formulated on the basis of the quasi-lattice structure of the plasma advanced by Cook and McEwan. Finally, based on Cook and McEwan's quasi-lattice model, a .semi-empirical formula 'Was worked out for the cohesive energy of the plasma as a function of temperature and pressure. The ionization potential appearing in Saha's equation was corrected by the effect of the plasma C9hesive energy, and a modified Saha's equation was derived. |
