Ordnance ~ cipal assistant. leaded this section, with Dr. C. W. Lampson of Aberdeen as his prin~r. J. C. Clark was the Los Alamos liaison man. The Naval Research Laboratory group was headed by Dr. E. H. Krause, with Dr. C. V. Strain assisting. This group made three measurements; the rate of increase of released energy, the time interval between the firing signal and the nuclear reaction, and the quantity of heat and light radiation. Photography was used extensively as a method of measurement. This type of photography was performed by a group of Air Force technicians under Brigadier General Paul T. Cullen. Mr. Berlyn Brixner acted as the Los Alamos liaison man. The Rad-Saf ety group TG 7.6 conducted measurements of radiation as a function of distance for the Scientific Director. These measurements were in addition to TG 7.6’s primary responsibility to ensure radiological safety. The overall technical engineering phases of the above experimental program, including tower installations, power supply and safety devices, were accomplished by a group from the Sandia branch of the Los Alamos Laboratory under Mr. R. W. Henderson, an Assistant Scientific Director. Bomb assembly and movement operations were performed by another group from Sandia also under Mr. Henderson. Special procurement of technical equipment and technical supplies required in the above program was handled by a group from procurement office of Los Alamos Laboratory headed by Mr. Harry S. Allen. The operations of all of the above groups w~s facilitated by the assignment of officers and men from AFSWP to the individual groups. This assignment had the dual purpose of familiarizing AFSWP personnel in techniques of instrumentation and with the new bomb design elements being tested. The above groups, together with an administrative group, formed Task Unit 7.1.1 with Dr. Darol K. Fromani the Scientific Director, in charge. Dr. Froman’s immediate staff consisted of Dr. Alvin C. Graves, Deputy Scientific Director, Mr. R. W. Henderson, First Assistant Scientific Director and Dr. John C. Clark, Second Assistant Scientific Director. Task Unit 7.1.1 was the only unit of Task Group 7.1. Captain James S. Russell, USN, the Test Director, was the Commander of Task Group 7.1 and Colonel Paul T. Preuss, USAF, was Deputy. These two officers were assigned from the Atomic Energy Commission’s Division of llilitary Applications. Commander Don W. Wulzen, USN, on loan to the AIZC from the MLC, was Chief Staff Officer. It was this group which was responsible to the AEC for the technical conduct of the tests but under command of the Commander, Joint Task Force Seven, for operational and necessary administrative matters. In addition to the primary program of experiments discussed above a secondary program of experiments were conducted by the Armed Services but under the technical supervision of the Scientific Director. This arrangement was necessary to insure complete coordination and to assist the Service groups in conducting their various experiments. In addition to technical supervision of the experiments of the Service groups, the Scientific Director was also responsible for coordinating those experiments of project “Fitzwilliam” which were conducted within 20 miles of the test site. ——— .-