aay consésuently, the degree of accuracy of cata collected by the fnstriments suf- fered to a great extent, smd oo useicl Y-rsp dste were sbtaini’ fron Teak Staticn 209 as noted in the prewious section. Under these ciremstances che balliscic calorimeter system probably fimctioned sore satisfactorily than would have any of the other systems under consideration for the maeasurezent of X-ray and total cheraal energy. Heat leakage inco the calorimecer compartment after secoud-stazge firing was unfortunate. This beating effect was sose evident in aidsecctions where the instruments were designed to look radially outward, which lends support to the theory that the beat came frow an internal source rather than froma skin beating, since these were better insulated against skin heatirg than vere the transducers mounted on the projecting doors. satisfactorily from an ewaluation standpoint. useful in future tests of this nature. The instruments perforzed quite This technique should prove Also, no heating occurred before second- stage firing in the higher density air. REFERENCES 1. 2. 3. Minzer, BR. A., Champion, &. S. W., and Pond, H. L., The AZOC Model atmosphere, Air Force Cambridge gesearch Center, Washington, D. C., 1959. Victoreen, John A., The Calculation of X-Ray Mass Absorption Coefficients, J. Appl. Phys., Vol. 20, 1549, pp. 1181-1147. Berke, B. L., White, R., and Lindberg, B., Semi-empirical Determination of Mass Absorption Coefficients for the 5 to 50 Angstroms X-Ray Region, J. Appl. Phys., Vol. 28, 1947, pp. 98-105. hk. 5. Grodstein, G. W., X-Ray Attenuation Coefficients from 10 kew to 100 Mev, MBS Circular 583, National Bureau of Standards, April 30, 1557. Bethe, H. A., Same Phenowena in High Altitude Explosions, La-215), Los Alamos Scientific Laboratory, December 11, 1957.

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