Crater profile

Interpretation of Analytical Results—Tritium. The locations of transects in the Sedan ejecta field at which samples were collected are shown in Figure 1. The distribution of tritium with depth at five sites on Sedan crater lip is shown on Figure 2. Except for the 9A area, the various sectors of the crater lip have very similar tritium depth profiles. The 9A area is a unique sector of the crater lip. A large mass of earth lifted by the detonation fell back to the crater in the 9A area earlier than the rest of the crater ejecta. Part of this material slumped into the crater, and the rest remained on the crater lip forming a prominence on the crater profile. Missile ejecta is thinner on this high point, and open-field radiation levels are lower. Tritium concentrations in the ejecta or slumped material at 9A are lower than in the rest of the crater lip mass. 

Fig. 74. Crater profiles in an rf glow discharge for a steel sample when adding He to a 5 Torr (a) and a 9 Torr (b) argon plasma. (Reprinted with permission from Ref. [244].)...

Fig. 75. Influence of a magnetic field on the crater profiles. (1) Dc discharge, sample electrolytic copper plate, discharge voltage 1 kV, argon pressure 4 Torr, cathode-restrictor distance 0.29 mm, sputtering time 15 min,...

Bogaerts A. and Gijbels R. (1997) Calculation of crater profiles on a flat cathode in a direct current glow discharge, Spectrochim Acta, Part B 52 765-777. 

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