Download or read book Operation GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 5 1 Annex B Polaroid Dosimeters written by H. Haselkorn and published by . This book was released on 1952 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Operation Greenhouse Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 written by George V. Leroy and published by . This book was released on 1951 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glomerella, corn, and Vycor glass were used in an attempt to measure the dose of mixed nuclear radiation from an atomic bomb. Samples were placed in steel pipe stations located 300 to 800 yd from the tower on Easy Shot. Reasonable and consistent estimates of dose were obtained, but it is not possible to consider them more than approximations. Activated potassium bromide crystals and photoluminescent glass were exposed in unit-density phantoms at Easy Shot. These materials have been proposed for use as personnel dosimeters. Both were energy-dependent, but with this limitation, they were satisfactory dosimeters. (Author).

Download or read book Operation Greenhouse Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 written by George B. Wilson and published by . This book was released on 1952 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OPERATION GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 9 1 Staff Reports Parts 1 to 4 Annex 9 4 Documentary Photography written by LOS ALAMOS SCIENTIFIC LAB ALBUQUERQUE NM. and published by . This book was released on 1951 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Operation Greenhouse Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 1 9 Air Drop Instrumentation Part 3 Disc Camera written by EDGERTON GERMESHAUSEN AND GRIER INC BOSTON MA. and published by . This book was released on 1985 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: The disc camera was designed for use to determine the growth characteristic of the fireball and so the yield. The instrument has three separate optical systems and can record three separate streak images of the fireball on a rotating glass photographic plate. The angular velocity of the photoplate at the time of exposure s determined by marker pips recorded on the photoplate. The marker generator is gated by a phototube and is turned off by a time delay. Time to minimum can be determined directly from the streaks and by the use of the scaling laws. Bhangmeter yield can also be determined. For Operation Greenhouse, two cameras were operated in phototowers. Good records were obtained on the first two shots. On the George Shot, which was a daylight test, the photocell in the fiducial marker did not function and no records were attained. The cameras were not operated on the Item Shot. The yields derived compare favorably with those from other fireball determinations.

Download or read book Operation GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 6 9 Protective Clothing and Clothing and Personnel Decontamination written by F. M. Steadman and published by . This book was released on 1951 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Operation GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 1 5 Neutron Measurements Part 1 Diagnostic Neutron Experiments written by E. H. Krause and published by . This book was released on 1985 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of radiation on the passage of an electromagnetic wave along a cable are too complicated to predict accurately from theory alone. Also, near the bomb, the intensity during the shot is so high that the results of laboratory measurements must be extrapolated by too many orders of magnitude to be applied with much confidence to the test conditions. Therefore a number of cables were installed near the bomb for the sole purpose of study the radiation effects, both to help correct the data obtained in the present tests and to help predict shielding requirements in future tests. The two types of effects looked for were (1) a simple attenuation of a voltage across the line due to the shunt conductance set up when Compton recoil electrons from the gamma rays ionize the gas between the inner and outer conductors; and (2) an induced signal due to the Compton electrons being knocked out of the inner and outer conductors in unequal amounts. On the basis of the results, a discussion is given of the adequacy of the coral shielding actually used to protect the horizontal cable runs.

Download or read book OPERATION GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 1 1 Prompt Gamma Ray Measurements Part 1 The Measurement of Alpha by Prompt Gamma Rays written by Wayne C. Hall and published by . This book was released on 1987 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OPERATION GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 1 11 Timing and Firing and Fiducial Markers written by Herbert E. Grier and published by . This book was released on 1985 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: An automatic remote-control system armed and fired the bomb and sent out a sequence of time signals to experimental equipment on the atoll. A central station at Parry Island sent signals via submarine cables to a timer station on a shot island. The timer station controlled signals to the zero station and to experiments on the island, and through auxiliary stations, it also controlled signal distribution on adjacent islands. Light-sensitive triggering units for apparatus and for accurate standard zero-time reference were provided in the form of Blue Boxes, or fiducial markers.

Download or read book Operation Greenhouse Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 written by John L. Tullis and published by . This book was released on 1951 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Operation GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 2 1 Japtan Island Development and Animal Production written by ATOMIC ENERGY COMMISSION WASHINGTON DC. and published by . This book was released on 1951 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OPERATION GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 9 5 Base Facilities written by P. W. Spain and published by . This book was released on 1951 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1951 NTPR report describes an AECM (Architecture, Engineering, Construction and Maintenance) contract for the Eniwetok test site. Reconnaissance of Eniwetok Atoll was undertaken in October 1948 to determine the conditions at the site which would affect the construction of all facilities for a semipermanent proving ground. Based on this reconnaissance, an engineering report was prepared which proposed methods and costs of construction of the minimum facilities then proposed as necessary. Mobilization for construction began in February 1949, and construction started in July 1949. Support of the scientific and technical personnel and operations began in December 1951 and was essentially completed at the end of the Operation Greenhouse in June 1951. The contractor was able to successfully construct and furnish all items and services requested. At the end of Operation Greenhouse, the facilities were 'rolled-up' and placed in maintenance status until such time as build-up begins for a future operation.

Download or read book OPERATION GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 1 9 Air Drop Instrumentation Part 2 Teller Alpha written by Herbert E. Grier and published by . This book was released on 1985 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: It was the purpose of the Teller-Alpha experiment to measure the coefficient alpha by means of detectors placed a long distance from the bomb. The detectors are photoelectric devices which respond to visible light produced in the air surrounding the bomb by the absorbed gamma rays, A measurement of this sort was proposed by Edward Teller prior to the Sandstone Operation. The main components of the Teller-Alpha equipment were the photohead, the 200-Mc timing oscillator, and the high-speed-sensitivity recoding oscilloscope. A complete discussion of the experiment is provided.

Download or read book Operation GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 1 1 Prompt Gamma Ray Measurements Part 3 The Measurement of Transit Time written by W. C. Hall and published by . This book was released on 1985 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eport describes the procedures followed in measuring the transit time of the atomic explosions evaluated in Operation Greenhouse. It includes a description of the equipment used, the installations made, and the results obtained. Transmit time measurements were obtainded for the Easy, George and Item Shots; and on the whole, the transit-time recording equipment performed well. (Author).

Download or read book Operation Greenhouse Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 written by R. Harold Draeger and published by . This book was released on 1951 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OPERATION GREENHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 6 5 Interpretation of Survey Meter Data written by E. Tochilin and published by . This book was released on 1951 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the Scientific Director's Report of Atomic Weapon Test at Enuivetok, 1951. Under laboratory conditions a study of survey-instrument response to fission-product activity was made. This study involved a knowledge of beta-ray energy, gamma-ray energy, and beta-ray and gamma-ray dose rates associated with fission-product radiation fields. Fission-product activity was collected on aluminum plaques which were flown through the radioactive cloud following each of four bursts. These plaques were flown to the Laboratory for the work done. Beta-ray dose rates were determined with specially constructed beta-ray surface chambers previously calibrated with beta-ray isotopes. Using aluminum absorbers, beta-ray absorption curves were run and compared with similar absorption measurements obtained using known beta-ray isotopes. Gamma-ray dose rates were obtained by shielding out the beta-ray contribution. The response of various types of commercially available G-M counters and ion-chamber counters to fission-product beta-ray and gamma-ray was studied. Changes in beta-ray energy were studied for the period from 44.6 to 215.7 hr. It was found that the beta-ray absorption curve could be reproduced by a high-energy and low-energy component of beta radiation. Laboratory determination of effective gamma-ray energies using half-value-layer measurements by means of aluminum, copper and lead filters showed the energy to be dependent upon the absorber used.

Download or read book OPERATION GREEHOUSE Scientific Director s Report of Atomic Weapon Tests at Eniwetok 1951 Annex 1 9 Air Drop Instrumentation Part 3 Disc Camera written by and published by . This book was released on 1951 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The disc camera was designed for use in aircraft to determine the growth characteristic of the fireball and so the yield. The instrument has three separate optical systems and can record three separate streak images of the fireball on a rotating glass photographic plate. Each streak image shows the growth of the fireball along a diameter with respect to time; the three traces are displaced radially to avoid confusion. The shutters are opened at approximately -3 sec, and a phototube pulser circuit is arranged to close them before one revolution of the disc after zero time. The angular velocity of the photoplate at the time of exposure is determined by marker pips recorded on the photoplate. The marker generator is gated by a phototube and is turned off by a time delay. Time to minimum can be determined directly from the streaks, and by the use of the scaling laws, Bhangmeter yield can also be determined. For Operation Greenhouse two cameras were operated in phototowers. Good records were obtained on the first two shots. On George shot, which was a daylight test, the photocell in the fiducial marker did not function and no records were obtained. The cameras were not operated on Item shot. The yields derived compare favorably with those from the other fireball determinations and with radiochemistry.