functions of time. A summary of important features of some previous atomic clouds are included for comparison. Major Descriptors: *GREENHOUSE PROJECT; *NUCLEAR EXPLOSIONS -- RADIOACTIVE CLOUDS; *RADIOACTIVE CLOUDS -- PHOTOGRAPHY Descriptors: HEIGHT; TURBULENCE; WEATHER Broader Terms: CLOUDS; DIMENSIONS; EXPLOSIONS; NUCLEAR EXPLOSIONS Subject Categories: Weaponry 10/5/522 01877563 Author(s): Title: ~- 450202* -- Explosions & Explosives -- Nuclear -- (-1989) (Item 222 from file: 103) BRA-12-005105; EDB-87-005196 Porzel, F.B.; Whitener, Operation Greenhouse. tests at Eniwetok, 1951. Measurement of density, J.E. Scientific Director’s report of atomic weapon Annex 1.6. temperature, Blast measurements. shock produced by a nuclear explosion Corporate Source: Publication Date: Report Number(s): Part 5. and material velocity in an air Los Alamos Scientific Lab., 1 Sep 1985 p 146 NM (USA) AD-A-995355/5/XAB Document Type: “Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC AOQ7/MF AOl. Subfile: BRA (Energy Research Abstracts). GRA (NTIS NTS) Country of Origin: United States Country of Publication: United States Abstract: The results from laboratory tests and test firing were quite encouraging. It was concluded that: (1) the beta densitometer is a feasible device for the measurement of density as a function of time in the shock wave from a nuclear explosion. It is limited to pressure levels of 6 or 8 psi for bombs in the range of 50 kt, but is capable of higher-pressure levels on larger bombs where the interference from gamma rays is less serious; (2) dust-loading behind the shock wave is a major perturbation to the ideal hydrodynamics and can change the density by as large a factor as the shock itself; (3) the rise time at distances of 7,500 feet on Easy Shot was sharp within a resolution of approximately 0.2 msec; and (4) the field calibration used on Operation Greenhouse appeared reasonably accurate and was worthy of subsequent development. Major Descriptors: *GREENHOUSE PROJECT; *NUCLEAR EXPLOSIONS -- SHOCK WAVES; *SHOCK WAVES -- DENSITY; *SHOCK WAVES -- VELOCITY Descriptors: AIR; BOMBS; CALIBRATION; DENSITOMETERS; HYDRODYNAMICS; PRESSURE MEASUREMENT; TIME DEPENDENCE Broader Terms: EXPLOSIONS; FLUID MECHANICS; FLUIDS; GASES; MEASURING INSTRUMENTS; MECHANICS; NUCLEAR EXPLOSIONS; PHOTOMETERS; PHYSICAL PROPERTIES; WEAPONS Subject Categories: 450202* Weaponry -- (-1989) 10/5/523 01877562 Author(s): -- Explosions & Explosives -- Nuclear -- (Item 223 from file: ERA-12-005104; Biggers, W.A.; 103) EDB-87-005195 Brown, L.J. Title: Operation Greenhouse. Scientific Director’s report of atomic weapon tests at Eniwetok, 1951. Annex 1.5. Neutron measurements. Part 2. External neutron- and gamma flux measurements by sample activation. Section 1 Corporate Source: Los Alamos Scientific Lab., Publication Date: 1 Sep 1985 p 71 Report Number(s): AD-A-995354/8/XAB Document Type: Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC A04/MF AOQl. Subfile: ERA (Energy Research Abstracts). Country of Origin: United States SAAA1TIS NM (USA) GRA (NTIS NTS) :