High Altitude Nudet Phenomenology

摘要

We have been continuing to generate a data base of optical signals (at a variety of wavelengths). These simulated optical signals depend on both the burst point density and on weapon parameters. This quarter we have completed the 1, 100, 1000 and 10000 KT simulations for all altitudes. From these simulations we have generated optical signals in the silicon, S sub 4, visible, thermal, blue, green, red, broadband and narrow infrared bandpasses. We have made the MODEL3 code operational on the ELXSI computer at MRC and have successfully completed a 100 KT simulation at 82 km. However, at this time, the MODEL3 code is far from being run in a production mode. We plan on making MODEL3 runs to check the RADFLO results at 82 km. We have also applied John Zinn's scaling laws for estimating the yield of a nuclear detonation from critical times (t sub 1MAX, t sub MIN, t sub 2MAX) in the optical pulse to the RADFLO simulated data base. The Zinn scaling relationships for the visible and silicon responses were designed from low altitude data bases and the scaling laws produce large errors. However, Zinn's scaling rules for the S sub 4 detector explicitly include burst point density and his S sub 4 scaling relationships accurately estimates the yield up to an altitude of approximately 30 km (until the minimum in the optical signal disappears).