Country of Publication: United States Abstract: Free-piston gauges used to measure the parameters of the air shock wave at various distances from the point of detonation were investigated. This gauge consists of a piston, free to move with no restoring forces, and acted upon at one end by the shock wave which records a space-time curve, i.e., a distance-versus-time curve of the piston’s movement. A description of the instrument and a method of analyzing the records are presented, together with an evaluation of possible errors in the measurements. Air-blast pressure measurements made during X-ray, Yoke, and Zebra shots at various distances from the bomb are reported. The measurements consisted of the recording of pressure on a time base by means of diaphragm blast gauge channels. The gauge consists essentially of a small, fixed-edge diaphragm in which deformation due to pressure are transformed into changes of electrical resistance. The instrumentation, consisting of the gauge, carrier-type amplifier and recorders, as well as the power system, is described. Changes made in the instrumental setup after the initial test are discussed. Major Descriptors: *NUCLEAR EXPLOSIONS -- SHOCK WAVES; *SANDSTONE PROJECT; *SHOCK WAVES -- PRESSURE MEASUREMENT Descriptors: PRESSURE GAGES; TIME DEPENDENCE Broader Terms: EXPLOSIONS; MEASURING INSTRUMENTS; NUCLEAR EXPLOSIONS Subject Categories: Weaponry -- 10/5/519 01877566 Author(s): 450202* (-1989) -- Explosions & Explosives -- Nuclear -- (Item 219 from file: 103) ERA-12-005108; EDB-87-005199 Engquist, E,H. Title: Operation Greenhouse. Scientific Director’s report of atomic weapon tests at Eniwetok, 1951. Annex 6.6. Evaluation of filter material Corporate Source: Chemical and Radiological Labs., Army Chemical Center, MD (USA) Publication Date: 1 Apr 1985 p 58 Report Number(s): AD-A-995358/9/XAB Document Type: Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC A0Q4/MF AOQl. Subfile: ERA (Energy Research Abstracts). GRA (NTIS NTS) Country of Origin: United States Country of Publication: United States Abstract: Four types of standard and developmental filter materials used in individual and collective-protective devices and one type of developmental filter material used for sampling of air for particulate Matter were evaluated against the contamination produced by the detonation of an atomic bomb and present in the resulting radioactive Cloud. These filter materials were evaluated in multilayer pads at the Standard flow-rate conditions used by the Chemical Corps in evaluation Studies of filter materials. This permitted correlation of results of laboratory data. Analysis of the materials was made by counting the gross beta activity collected on successive layers of the same filter material and the efficiency of the materials was calculated from the data obtained. Major Descriptors: *AIR SAMPLERS -- AIR FILTERS; *GREENHOUSE PROJECT; *NUCLEAR EXPLOSIONS -- AIR SAMPLERS; *NUCLEAR EXPLOSIONS -- RADIOACTIVE CLOUDS; *RADIOACTIVE CLOUDS -- AIR SAMPLERS Descriptors: AEROSOLS; AIR FLOW; EFFICIENCY; FIBERS; FILTRATION; FISSION PRODUCTS; FLIGHT TESTING; FLOW RATE; PARTICLE SIZE; PARTICULATES; RADIOACTIVE MATERIALS; RESPIRATION; SAMPLING Broader Terms: CLOUDS; COLLOIDS; DISPERSIONS; EQUIPMENT; EXPLOSIONS; FILTERS; FRUID FLOW; GAS FLOW; ISOTOPES; MATERIALS; NUCLEAR EXPLOSIONS; PARTICLES; POLLUTION CONTROL EQUIPMENT; RADIOACTIVE MATERIALS; SAMPLERS a SEPARATION PROCESSES; SIZE; SOLS; TESTING Subject Categories: 450202* PRP] TT 3989) -- Explosions & Explosives -- Nuclear --