CHAPTER 3 DOD EXPERIMENTAL PARTICIPATION The CASTLE experimental program primarily focused on development of usable thermonuclear weapons, with secondary interest on their effects. The DOD participated both in weapon development and effects experiments but concentrated on the latter. Within JTF 7, execution of the experi- mental program was the function of the scientific task group (TG l). WEAPON DEVELOPMENT TG 1 was subdivided into 12 task units that conducted the program. Both of the AEC weapon design laboratories had task units (TU 1 and TU 12) that conducted their experiments; an additional task unit (TU 13) ducted DOD weapon effects experiments. con- Support for these experiments was provided by nine additional task units. The 12 task units are, described in Chapter 1. The names of the task units and the number of persons who participated in each are shown in Table 18. The DOD had several administrative and special reporting units for military personnel on active duty who participated in weapon design experiments at Los Alamos and Livermore. Some of these units were the: 845l1st Area Administrative Unit, Washington, D.C. 8452nd Area Administrative Unit, Sandia Base, New Mexico Naval Administrative Unit, Sandia Base, New Mexico 1090th USAF Special Reporting Group, Sandia Base, New Mexico 1146th USAF Special Activities Squadron, Fort Myer, Virginia. The Naval Research Laboratory (NRL) provided personnel and conducted experiments for Los Alamos in the Los Alamos Scientific Laboratory weapon development program (References 36 through 39). (LASL) The Air Force sup- ported the weapon development program through cloud-sampling operations to 166