APPENDIX"A" PROGRAM 1.0 — LOS ALAMOS EXPERIMENTS 1. GENERAL REMARKS Program 1.0 was divided into three main parts: a, Diagnostic measurements designed to measure detailed weapon performance during the process of cnergy gencration, b. Phenomenology measurements designed to measure and cvaluate blast, thermal and visible radiation, and nuclear radiations, i.e., gamma rays and nowtrons, Ce Remote weapon performance measurements designed to measure transit time and yield under combat conditions by means of airborne instruments. In addition, this program included projects concerned with cryogenic, and timing and firing techniques. an DIAGNOSTIC MEASUREMENTS The diagnostic measurcments, especially those concerned with the under- standing of the thermonuclear reactions were extremely conplex but excelient results were obtaincd. Among the principal diagnostic moasurements for the fission reaction were the following: a. Measurements of "alpha" or the /rate of rise of the nuclear reaction, . b. The quantitative chemical. anilysis of radioactive isotopes produccd in the nuclear reactions with a view to determining energy releases, Samples for those measurements were collected successfully by drone end mannod aircraft and attempted unsuccessfully by rockcts and specially designed ground sampling devices. The use of manned sampling aircraft, first attempted on Operation RANGER, was successful and crews did not receive cxeussive total radiation dosayes, c. The "transit time” or time required for the device to becone assembled und the reaction to occur after the firing signal reached the detonators, d. . Visable radiation measurements which included ball of fire observations and growth and rise of the atomic cloud. The thermonuclear experiments required much more elaborate instrumentation esigned to measure the detailed progress of the thermonuclear reactions, | ‘Less elaborate but equally omy ie A .