| Correcting the Response of an Albedo Neutron Dosimeter for Energy |
JAN 2007 |
27 pages |
| Authors:
Gordon K. Riel; Patrick J. Winters; James R. Cassata; Ted St. John; Luis A. Benevides; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
 | The neutron response of an albedo neutron dosimeter varies greatly with energy. For example, the dosimeter, calibrated with moderated Californium fission neutrons, will read more than 30 times the dose from thermal neutrons and less than 3% of the dose from 14 MeV neutrons. To report a correct result, the measured dose equivalent is multiplied by a neutron energy correction factor (NECF). Two techniques for finding the NECF were developed ... |
|
| Investigation into the Feasibility of Highly Enriched Uranium Detection by External Neutron Stimulation (Expanded Study) |
MAY 2006 |
238 pages |
| Authors:
Martin E. Nelson; James F. Ziegler; Harry F. Feigel; Crystine M. Good; Bryan N. Blackburn; Joseph S. St. John; Sean J. Locke; Jeffrey D. Allen; NAVAL ACADEMY ANNAPOLIS MD DEPT OF MECHANICAL ENGINEERING
|
| This report studied the detectability of 1kg of HEU in a cargo container, whose dimensions are 20'x8'x8', by stimulating the HEU with neutron source located external to the container and counting the neutrons that would be produced with a high sensitivity thermal neutron detector. This project examined a wide variety of different energy sources, counting options, and the effect of different cargo materials present within the container. The study considered ... |
|
| A Primer on the Detection of Nuclear and Radiological Weapons |
24 AUG 2005 |
72 pages |
| Authors:
Gary W. Philips; David J. Nagel; Timothy Coffey; NATIONAL DEFENSE UNIV WASHINGTON DC CENTER FOR TECHNOLOGY AND NATIONAL SECURITY POLICY
|
| The detection of materials or devices for nuclear or radiological weapons of mass destruction (NRWMD) is fundamentally important to both homeland security and to military operations. Detection technologies are necessary both to find and to verify the location of materials, components, and systems for NRWMD. They are also central to actions taken after deployment of a NRWMD. The study upon which this report is based was undertaken because of the ... |
|
| Film Implementation of a Neutron Detector (FIND): Proof of Concept Device |
01 OCT 2003 |
54 pages |
| Authors:
W. C. McGinnis; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
|
| The research described in this report addresses the problem of efficient and convenient inspection of buildings, vehicles, persons, and other places for concealed nuclear materials (such as uranium or plutonium) that are being used, or capable of being used, in nuclear weapons. One way to determine the presence of nuclear materials is to detect the neutrons that are emitted from the atomic nucleus of these materials in the radioactive decay ... |
|
| 3-D CHARACTERIZATION OF SEISMIC PROPERTIES AT THE SMART WEAPONS TEST RANGE, YPG, |
FEB 2002 |
|
| Authors:
RICHARD D. MILLER; Thomas S. Anderson; JONN C. DAVIS; DON W. STEEPLES; MARK L. MORAN; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
 | (U) THIS PAPER PRESENTS RESULTS FOR AN EXTENSIVE HIGH RESOLUTION GEOPHYSICAL CHARACTERIZATION STUDY AT THE SMART WEAPONS TEST RANGE SITE ALONG WITH VALIDATION USING 3-D MODELING. IN THE STUDY SEVERAL SHALLOW SEISMIC METHODS AND PROCESSING TECHNIQUES WERE USED TO GENERATE A 3-D GRID OF EARTH SEISMIC PROPERTIES, INCLUDING COMPRESSIONAL AND SHEAR BODY WAVE SPEEDS AND THEIR ASSOCIATED BODY WAVE ATTENUATION PARAMETERS. THE REPORT SHOWS RESULTS OF DETAILED CHARACTERIXATIONS OF GEOPHYSICAL ... |
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| A MINIATURE ACOUSTIC SENSOR THAT MIMICS MAMMALIAN SOUND PROCESSING, |
FEB 2002 |
|
| Authors:
ALLYN HUBBARD; TOM BIFANO; JIHAD BOURA; FANGYI CHEN; ANDREW CHERRY; HOWARD COHEN; SOCRATES DELIGEORGES; CHRISTOPHER KAPUSTA; CHRISTIAN KARL; BOSTON UNIV MA COLL OF ENGINEERING
|
| (U) THIS PAPER PRESENTS THE DEVELOPMENT OF A MINIATURE ACOUSTIC SENSOR THAT CONTAINS MECHANICAL AND ELECTRICAL COUNTERPARTS TO THE AUDITORY PROCESSING SUBSYSTEMS USED BY MAMMALS. THE COCHLEA LIKE FRONT END OF THE DEVICE IS DESIGNED USING A RIBBED STRUCTURE COMPOSED OF POLYMER GROUND STRUCTURES BUILT UP WITH METAL COMPRISING COUPLED RESONATORS. A SCHEMATIC OF THE DEVICE IS SHOWN IN THE PAPER DEMONSTRATING AN ONGOING PROJECT SHOWING ALSO RESULTS AT A ... |
|
| BIOLOGICALLY INSPIRED FUSION OF SONAR SENSOR DATA, |
FEB 2002 |
|
| Authors:
CLAIRE L. MCCULLOUGH; ROBERT PAP; RICHARD AKITA; JERRY WILSION; ACCURATE AUTOMATION CORP CHATTANOOGA TN
|
| (U) THIS PAPER DESCRIBES AN ARTIFFICIAL PROCESSING ARCHITECTURE, AND THE PROCESSING STEPS FOR THIS ARCHITECTURE, BASED ON NATURAL MAMMALIAN PROCESSING. ADDITIONAL LEVELS OF FUSION, INCLUDING BOTH FEATURE AND DECISION LEVEL FUSION, ARE EVALUATED TO IMPROVE A SYSTEM'S ABILITY TO DISCRIMINATE TARGETS FROM CLUTTER. THE TECHNIQUES USED TO PROCESS SONAR DATA FOR NAVAL APPLICATIONS IS CONSIDERED FOR OTHER COMMERCIAL USES, WITH A POTENTIAL FOR IMPROVING DETECTION, OR TO FUSE DATA FROM ... |
|
| High-Pressure Helium-3 Scintillation Position-Sensitive Detector of Thermal Neutrons |
2002 |
13 pages |
| Authors:
A. Bolozdynya; A. Bolotnikov; J. Richards; CONSTELLATION TECHNOLOGY CORP LARGO FL
|
| The objective of this study is to demonstrate the feasibility of constructing a compact neutron detector that is sensitive to thermal and epithermal neutrons and has high rejection efficiency relative to gamma-ray background. A two-channel high-pressure 3He scintillation detector is considered for the detection of neutrons in coincidence mode. The detector consists of two large avalanche photodiodes viewing a gas volume filled with pressurized 3He. Experiments with the detector demonstrate ... |
|
| Neutron Radiography |
AUG 1998 |
91 pages |
| Authors:
Harold Berger; Frank Iddings; INDUSTRIAL QUALITY INC GAITHERSBURG MD
|
| Neutron radiography is becoming a well established nondestructive testing (NDT) method. The American Society for Nondestructive Testing (ASNT) has recognized the method through its recommended practice SNT-TCIA which outlines training, knowledge, and experience necessary to obtain levels of competency in the method. Certification of nondestructive testing personnel is also covered in a military standard. Technical publications in the field of NDT and nuclear technology carry articles ... |
|
| Development of an Improved Direct Neutron Sensor |
NOV 97 |
68 pages |
| Authors:
Francis E. LeVert; KEMP CORP KNOXVILLE TN
|
| The feasibility study of the use of conductive polymers to design and assemble a neutron monitor sensitive to fast and thermal neutrons has been completed. Polyacetylene, polypyrrole and polythiophene conductive polymers with conductivities that range from 10(exp -4) (omega-cm)-1 down to 10(exp -11) (omega-cm)-1 were used in this investigation. The sensors were exposed to neutrons from an Am-Be sealed source with an average energy of 2.5 MeV and a 14 ... |
|
| Development of a Directional Thermal Neutron Detector System |
JUL 96 |
78 pages |
| Authors:
Robert L. Schulte; Martin Kesselman; Frank R. Swanson; NORTHROP GRUMMAN CORP BETHPAGE NY
|
| The development of a portable, thermal neutron detection system for nuclear monitoring is described. The report outlines the design, development, fabrication and testing of a prototype directional thermal neutron detector. The system is a battery powered unit that contains 12 detector modules. Each module consists of a thin gadolinium foil convertor layer sandwiched between two planar, large area, quad silicon detectors and the associated analog electronics to process the 8 ... |
|
| Detection of Subsurface Fissionable Nuclear Contamination Through the Application of Photonuclear Techniques. |
27 FEB 1996 |
|
| Authors:
Gary F. Mastny; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A photoneutron detection apparatus comprises an X ray generator and a neutron detector adapted for placement in proximity to subsurface soil. The X ray generator produces timed pulses of X ray photons having a range of electronically controlled energies which penetrate the subsurface soil to produce photoneutron emissions that are received by the neutron detector. The neutron detector generates a signal representative of the neutron flux. A signal analysis system ... |
|
| Detection of Buried Nitrogen Rich Materials. |
25 APR 1995 |
|
| Authors:
Han S. Uhm; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| Fast neutrons from a moving source are thermalized by travel through water to a soil embedded body of nitro- gen-rich material causing emission of gamma rays there- from Emitted gamma rays are detected at a location adjacent the neutron source for measurement of radiation energy from which location of nitrogen-rich materials in the soil is mapped, based on a predetermined signature energy level of the measured radiation. (AN) ... |
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| Experimental Evaluation of an Instrumented Synthesis Method for the Real-Time Estimation of Reactivity |
JUN 93 |
|
| Authors:
Lorin C. Selby; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| This research is part of an investigation into the feasibility of using reactor-generated signals in an instrumented synthesis method for the real-time estimation, of reactivity. The method utilizes in-core neutron detectors to evaluate local core power distributions for eventual use in an on- line controller. Although numerical evaluation of the synthesis method has proven successful, this experimental work was conducted to determine if the signals provided by actual in-core sensors ... |
|
| Construction and Testing of a Neutron and Gamma Spectrometry System Using Pulse Shape Discrimination with an Organic Scintillator |
MAR 1993 |
207 pages |
| Authors:
Robert S. Pope; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING
|
| The goal of this thesis was to construct and test a neutron detector to measure the energy spectrum of 1 to 14-MeV neutrons in the presence of gammas. A spectrometer based on the process of pulse shape discrimination (PSD) was constructed, in which the scintillator NE-213 was used. The primary neutron/ gamma sources used were 78-mCi and 4.7-Ci 239PuBe sources, while 4.7-micro-Ci and 97.6-micro-Ci 22Na gamma sources were used for ... |
|
| The Relativistic Solar Proton Event of 11 June 1991 |
1993 |
5 pages |
| Authors:
D. F. Smart; M. A. Shea; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
|
| The X12/38 solar flare that occurred at heliographic coordinates N31, Wl7 in NOAA region 6659 on 11 June 1991 commencing at 01 56 UT was the source of a number of energetic phenomena including intense X-ray and gamma ray emission and the acceleration of ions to relativistic energies. The small associated ground-level enhancement (GLE) of about 6 hours duration was mildly anisotropic even though a geomagnetic storm was in progress. ... |
|
| Cold Fusion Verification |
MAR 91 |
|
| Authors:
M. H. North; G. F. Mastny; E. J. Wesley; NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA
|
| The objective of this work to verify and reproduce experimental observations of Cold Nuclear Fusion (CNF), as originally reported in 1989. The method was to start with the original report and add such additional information as became available to build a set of operational electrolytic CNF cells. Verification was to be achieved by first observing cells for neutron production, and for those cells that demonstrated a nuclear effect, careful calorimetric ... |
|
| Evaluation of Neutron Dose Measurement Techniques for Use in a Shipboard Environment |
22 MAY 90 |
|
| Authors:
Michael J. Wilson; NAVAL ACADEMY ANNAPOLIS MD
|
| Recently, the biological effect of fast neutrons has been under review. As a result, adjustments may be required in the current dose equivalence algorithms when fast neutron field are present. Since many Navy personnel are exposed routinely to fast neutron radiation fields, there is a need to be able to reduce any uncertainties about the amount of exposure that they have received. While many devices are available for personnel neutron ... |
|
| Making Steel Forgings from Powder. |
OCT 1989 |
|
| Authors:
J. A. Vaccari
|
| As-Forged virtually to net shape and full density, steel PM match or closely approach the properties of wrought-steel parts and provide substantial cost savings for complex shapes 1/2 to 2-in. thick, as large as about 8 in. OD, and with IDS as small as 1/2 in. Tolerance requirements for cams, splines and gears usually can be met without subsequent processing, and even heat treatment can be integrated in-line immediately after ... |
|
| A High Efficiency Fast Neutron Detector |
02 AUG 89 |
|
| Authors:
R. A. August; G. W. Phillips; J. H. Cutchin; NAVAL RESEARCH LAB WASHINGTON DC
|
| This report researches a concept for a high efficiency detector of fast neutrons (several MeV), using solid state charged particle detectors overlaid with thick disks (about mm) of 238U. Experiments show a significant count rate in our mock-up when exposed to a fast neutron flux, but it appears insensitive to the slow/thermal neutron flux. Our preliminary results indicate a system with an efficiency on the order of at least 5% ... |
|
| Monitoring System and Method for Nuclear Weapons Effects Detection and Damage Assessment. |
02 MAY 1989 |
|
| Authors:
Charles L. Christianson; Jay S. Hall; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| This patent discloses a system for detecting a nuclear weapon explosion and assessing damage there from comprising a sensor head and an electronic signal processor is disclosed. The sensor head is spherical in shape and comprises a plurality of temperature sensors at different locations on the sensor head and provide information concerning the direction of the radiation. Elapsed time between thermal pulse peaks measure yield of the weapon. A plurality ... |
|
| Dose Equivalent LiF TLD (Thermoluminescent Dosimeter) Neutron and Photon Area Monitor |
SEP 88 |
|
| Authors:
G. K. Riel; E. Barnes; K. Wood; J. C. Wang; G. Zeman; NAVAL SURFACE WEAPONS CENTER WHITE OAK LAB SILVER SPRING MD
|
| A passive area monitor has been demonstrated that can measure neutron and gamma-ray dose equivalents. The Monitor combines the neutron moderator shield of a Snoopy remeter with a Lithium Fluoride TLD thermal neutron and gamma-ray detector. This area monitor can be a valuable aid in evaluating personnel LiF TLD albedo neutron dosimeter exposures. Calibrated with PuBe, the Monitor will read the actual neutron dose equivalent -60 + 160 percent over ... |
|
| Response Functions of A BC501 Scintillation Detector for Neutrons up to 41 MeV |
APR 87 |
|
| Authors:
Rex R. Kiziah; Michael P. Snell; AIR FORCE WEAPONS LAB KIRTLAND AFB NM
|
| Using time-of-flight and pulse-shape discrimination techniques, the response functions of a 5-cm-long by 5-cm diam BC501 liquid organic scintillation detector were measured for nearly monoenergetic neutrons at 43 energies between 2 and 41 MeV. Absolute normalization of the neutron pulse- height distributions for energies less than 31 MeV was performed by matching the largest pulse-height regions, the proton-recoil plateaus, of the distributions to Monte Carlo calculations of the detector response. ... |
|
| General Report on Weapons Tests. External Neutron Measurements 1946 through 1956, |
10 FEB 1987 |
|
| Authors:
Wendell A. Biggers; Freeman Waddell; LOS ALAMOS NATIONAL LAB NM
|
|
| 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, |
01 SEP 1985 |
|
| Authors:
Wendell A. Biggers; Leon J. Brown; LOS ALAMOS SCIENTIFIC LAB ALBUQUERQUE NM
|
| The Greenhouse operation consisted of a series of four shots conducted at Eniwetok during the Srping of 1951. The external neutron threshold measurements consisted of the use of good samples to measure integrated thermal neutron fluxes and sulfur, iodine, and zirconium samples to measure fluxes of higher energy neutrons. The iodine also measured high-energy gamma-ray intensity. Measurements were also made on slow- and fast-neutron intensities as a function of time. ... |
|
| OPERATION DOMINIC, Fish Bowl Series. Project Officers Report--Project 2.1 External Neutron Flux Measurements, |
01 APR 1985 |
|
| Authors:
John W. Kinch; ARMY NUCLEAR EFFECTS LAB EDGEWOOD ARSENAL MD
|
| The objective of this project was to measure the neutron flux as a function of distance from high-altitude nuclear detonations. The threshold detector system was used to measure the flux. Gold, U235, Pu239, Np237, U238, sulfur, magnesium, aluminum, and zirconium foils were employed as detecting materials. Instrument pods carried aloft by the launch vehicles were used to position the detectors near the detonation. Four sets of instruments were placed in ... |
|
| Nondestructive Evaluation Technology Working Group Report (IDA/OSD R&M (Institute for Defense Analyses/Office of the Secretary of Defense Reliability and Maintainability Study). |
AUG 1983 |
|
| Authors:
G. Mayer; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA SCIENCE AND TECHNOLOGY DIV
|
| This document records the activities and presents the findings of the Nondestructive Evaluation Technology Working Group part of the IDA/OSD Reliability and Maintainability Study, conducted during the period from July 1982 through August 1983. |
|
| USSR Report, Engineering and Equipment, No. 87 |
26 JUL 1982 |
|
| Authors:
JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA
|
| This USSR Report contains articles on Engineering and Equipment. The Main topics are Marine and Shipbuilding, Nuclear Energy, Non-Nuclear Energy, Industrial Technology, Turbine and Engine Design, Navigation and Guidance Systems, Fluid Mechanics, Mechanics of Solids, and Testing and Materials. |
|
| External Neutron Measurements, 1952 through 1958, |
15 MAY 1981 |
|
| Authors:
J. H. McNeilly; J. E. Frandolig; D. L. Rigotti; KAMAN TEMPO SANTA BARBARA CA
|
|
| Guide for Nuclear Meter Roof Moisture Surveys |
DEC 1980 |
36 pages |
| Authors:
Lewis E. Link Jr.; Charles A. Miller; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
|
| This report presents guidance for the conduct of roof moisture surveys using nuclear moisture meter devices. The technique presented is applicable to flat built-up roofs with insulation between the roof deck and membrane. Specific information is provided on how nuclear meters work, presurvey assembly of roof data, planning and conducting roof surveys, and data analysis. An example application of the data analysis procedures is included, as well as lists of ... |
|
| A Comparison of Measured and Calculated Air-Transported Radiation from a Fast. Unshielded Nuclear Reactor |
DEC 1980 |
|
| Authors:
H. Alan Robitaille; Bernard E. Hoffarth; DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
|
| Neutron and gamma-ray spectra have been measured at various distances up to 1100 metres from the fast-neutron reactor of the U.S. Army Pulse Radiation Division (Materiel Testing Directorate, Aberdeen Proving Ground, Md.) The spectra were obtained at a height of two metres above the air-ground interface and are compared to previous measurements performed by two other research laboratories, and also to the results of theoretical predictions based on two- dimensional ... |
|
| Operation Ranger. Volume 3. Program Report-Weapons Development. |
01 FEB 1980 |
|
| Authors:
KAMAN TEMPO SANTA BARBARA CA
|
|
| Operation PLUMBBOB. Project 41.3. Effects of Altitude on Neutron Measurements. |
01 OCT 1979 |
|
| Authors:
C. R. Mehl; GENERAL ELECTRIC CO SANTA BARBARA CA TEMPO
|
| It is demonstrated that high- and intermediate-energy neutron flux increases with altitude above ground, and that low-energy flux decreases with increasing altitude above ground. |
|
| Operation PLUMBBOB. Project 2.6. Evaluation of New Types of Radiac Instruments. |
01 OCT 1979 |
|
| Authors:
GENERAL ELECTRIC CO SANTA BARBARA CA TEMPO
|
| The objectives of this project were to evaluate the response of newly developed gamma-neutron dosimeters and the field operational adequacy of a new beta-gamma ion-chamber rate meter. It was concluded that the neutron-dosimeter system tested was subject to some effect, probably a neutron dose rate dependency, which caused the loss of accuracy. The recommendation is made for more laboratory study of this effect and the dosimeter system. (Author) |
|
| Operation TUMBLER-SNAPPER. External Neutron Measurements. Projects 17.1 and 17.2. |
01 OCT 1979 |
|
| Authors:
C. L. Cowan; W. A. Walker; GENERAL ELECTRIC CO SANTA BARBARA CA TEMPO
|
| Operation Snapper consisted of five shots at the Nevada Proving Grounds fired in the spring of 1952 immediately following the three shots which comprised Operation Tumbler. Part 1 of this report presents the measurement of neutron flux external to the bomb made in poor geometry as functions of distance and energy with threshold detectors and as functions of time in both poor and good geometries. Descriptions of equipment and techniques ... |
|
| Propagation of a Forbush Decrease in Cosmic Ray Intensity to 15.9 AU, |
30 MAR 1979 |
|
| Authors:
J. A. Van Allen; IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY
|
|
| Tests of Neutron Dosimeter, Advanced Development Model, |
JAN 1978 |
|
| Authors:
Ockle E. Johnson; ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND FORT MONMOUTH NJ COMBAT SURVEILLANCE/TARGET ACQ LAB
|
| The dosimeters were subjected to two types of tests to determine their accuracy and temperature response. They were exposed to 14 MeV neutrons from 31 rads to 781 rads with one exposure to 1880 rads to check the response to over exposure. The dosimeters passed all of these tests. In addition, the dosimeters were tested for temperature in the range from -40 C to +52 C. The dosimeters also passed ... |
|
| Measurements of Vacuum Ultraviolet Radiation, Neutrons, and Ions from the Interaction of an Intense Relativistic Electron Beam and a Deuterated Polyethylene Target. |
MAR 1976 |
|
| Authors:
John R. Kerns; David J. Johnson; AIR FORCE WEAPONS LAB KIRTLAND AFB N MEX
|
| The interaction of a tightly pinched relativistic electron beam from a Bennett cathode and a deuterated polyethelene target has been studied using diagnostics sensitive to vacum ultraviolet and neutron radiation. Target plasmas produced by three electron accelerators were analyzed. X-ray pinhole camera photographs indicated plasma sources equal to or less than 75 micrometers in diameter. Maximum plasma temperatures of 50 ev were detected and conversion efficiencies of approximately 0.1% from ... |
|
| Meltable Plug Radiation Switch. |
29 JUL 1975 |
|
| Authors:
Joseph R. Klein; DEPARTMENT OF THE AIR FORCE WASHINGTON D C
|
| The patent describes a meltable plug radiation switch having a meltable uranium alloy plug which forces the ends of a snap ring apart and into contact with a pair of spring clip contacts to complete a circuit. Through exposure to radiation, the plug melts, thereby allowing the snap ring ends to come together breaking the circuit. This invention relates generally to a switch which will activate a device such as ... |
|
| Upper Limits to the Quiet-Time Solar Neutron Flux from 10 to 100 MeV. |
23 JUN 1975 |
|
| Authors:
Shin Moon; George M. Simnett; R. Stephen White; CALIFORNIA UNIV RIVERSIDE INST OF GEOPHYSICS AND PLANETARY PHYSICS
|
| The UCR large area solid-angle double scatter neutron telescope was flown to search for solar neutrons on 3 balloon flights on September 26, 1971, May 14, 1972 and September 19, 1972. The first two flights were launched from Palestine, Texas and the third from Cape Girardeau, Missouri. The float altitude on each flight was at about 5 g/sq cm residual atmosphere. Neutrons from 10 to 100 MeV were measured. No ... |
|
| Geophysics and Space Data Bulletin. Volume XI, Number 4, Fourth Quarter 1974. |
MAR 1975 |
|
| Authors:
Anne L. Carrigan; AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MASS
|
| This report contains AFCRL contract and inhouse data reported from sites throughout the world. The following types of data are presented: magnetometer, cosmic ray, ELF noise, riometer, solar optical and radio emission, and ionosonde. This issue covers such data for October, November, and December 1974. |
|
| Geophysics and Space Data Bulletin. Volume XI, Number 2. Second Quarter 1974. |
SEP 1974 |
|
| Authors:
Anne L. Carrigan; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
|
| This Bulletin is a quarterly publication that contains AFCRL contract and inhouse data reported from sites throughout the world. The following types of data are contained within each issue: magnetometer, cosmic ray, ELF noise, riometer, solar optical and radio emission, and ionosonde. This issue covers such data for April, May, and June 1974. |
|
| Geophysics and Space Data Bulletin. Volume XI, Number 1. First Quarter 1974. |
JUN 1974 |
|
| Authors:
Anne L. Carrigan; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
|
| The Bulletin is a quarterly publication that contains AFCRL contract and inhouse data reported from sites throughout the world. Program descriptions for all data sections are updated annually or as required, and are presented in Number 1 of each volume. The following types of data are contained within each issue: magnetometer, cosmic ray, ELF noise, riometer, solar optical and radio emission, and ionosonde. This issue covers such data for January, ... |
|
| Geophysics and Space Data Bulletin. Volume 10, Number 4. Fourth quarter 1973. |
MAR 1974 |
|
| Authors:
Anne L. Carrigan; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
|
| The Bulletin is a quarterly publication that contains AFCRL contract and inhouse data reported from sites throughout the world. Program descriptions for all data sections are updated annually or as required, and are presented in Number 1 of each volume. The following types of data are contained within each issue: magnetometer, cosmic ray ELF noise, riometer, solar optical and radio emission, and ionosonde. This issue covers such data for October, ... |
|
| Earth Albedo Neutrons from 10 to 100 MeV. |
01 JUL 1973 |
|
| Authors:
Alan M. Preszler; CALIFORNIA UNIV RIVERSIDE INST OF GEOPHYSICS AND PLANETARY PHYSICS
|
| Neutrons produced by the interaction of primary cosmic rays with atmospheric nuclei have been measured at energies from 10 to 100 MeV and angles from 20 degrees to 80 degrees to the vertical. The data were taken on a balloon flight from Palestine, Texas, 40 degrees North geomagnetic latitude, on September 26, 1971. A telescope constructed of two large area tanks of liquid scintillator measured the incident neutron's energy and ... |
|
| Investigations to Improve the Growth of Quality Verneuil and Chalcogenide Crystals. |
JUL 1973 |
|
| Authors:
Peter J. Gielisse; Shashanka S. Mitra; RHODE ISLAND UNIV KINGSTON DIV OF ENGINEERING RESEARCH AND DEVELOPMENT
|
| This final technical report deals with the synthesis and characterization of a variety of materials specifically cubic boronphosphide, cubic boron nitride, diamond, sapphire, and ruby, europium sulfide and the chalcogenides of cadmium. Characterization has been in terms of spectra, electrical conductivity, thermal neutron detection, morphology and thermal stability. A mathematical and thermodynamic model of the flame fusion crystal growth process has been developed. Polymorphism has been fundamentally reviewed, yielding a ... |
|
| Data Processing System for Standardization of Gamma and Neutron Calibrators, |
10 APR 1973 |
|
| Authors:
Robert Summerer; Bernard Brown; NAVAL ORDNANCE LAB WHITE OAK MD
|
| A data processing system was developed to process and analyze data taken in the field standardization of shore-based gamma and neutron calibrators. The gamma calibrator, the AN/UDM-1A, is used to calibrate several types of gamma radiation detection instruments (radiacs). The neutron calibrator, the MX-9335 (XWO-1)/UDM, is used to calibrate a neutron detecting radiac set, the AN/PDR-70. Two computer programs process data taken from sets of transfer standard instruments which are ... |
|
| Integral Experiment to Test Carbon and Nitrogen Cross Sections. |
12 SEP 1972 |
|
| Authors:
Larry Harris Jr.; Gerald D. Trimble; Jack C. Young; GULF RADIATION TECHNOLOGY SAN DIEGO CALIF
|
| An integral experiment, designed to provide high-sensitivity tests for gamma-ray production and neutron-scattering cross sections, has been performed. The experiment is based on the white-source, pulsed-neutron, time-of-flight method with the sample at the detector end of the flight path. Measurements were made with a single 5 x 5 cm cylindrical NE-213 detector positioned at 30, 55, 90, and 125 degrees relative to the incident neutron beam. Pulse-shape discrimination was used ... |
|
| Reanalysis of the Neutron Spectrum Measurements in an Iron Bulk Assembly. |
09 OCT 1971 |
|
| Authors:
Ralph J. Cerbone; GULF RADIATION TECHNOLOGY SAN DIEGO CALIF
|
| A reanalysis has been made of neutron spectrum measurements in a 76.2-cm diameter iron sphere. Comparisons are made with a 296-group ANISN calculation using MAT 1101, and a 49-group 1DF calculation using the Westinghouse Evaluation, ENDF/B 1968. The integral agreement is resonable above 0.5 MeV, i.e., 10 to 25%; in the keV region the agreement is poorer for both calculations. (Author) |
|
| Neutron and Gamma-Ray Environments for Point Neutron Sources in an Air-Over-Ground Geometry. Volume I. |
12 JUL 1971 |
|
| Authors:
R. L. Beck; W. W. Brown; AEROSPACE CORP SAN BERNARDINO CALIF SAN BERNARDINO OPERATIONS
|
| A complete graphical presentation is given of an Oak Ridge transport calculation of the nuclear environment at the air-earth interface generated by point sources of monoenergetic neutrons. Monte Carlo methods were employed in the calculations (computer codes 05R and OGRE). The graphs contain the time, energy, angular, and spatial distributions of the gamma rays and neutrons from each of 8 monenergetic sources ranging from 0.1 to 15 MeV. The calculations ... |
|
Reports by Keyword(s)
NEUTRON DETECTORS
