| Optimization of the Temporal Pattern of Applied Radiation Dose: Implication for the Treatment of Prostate Cancer |
Mar-2009 |
28 pages |
| Authors:
Michael Altman; CHICAGO UNIV IL
|
 | Our previous modeling study demonstrated that the temporal pattern of applied dose during a single fraction of radiation can impact cell survival, especially in situations with low a/b and large dose/fx and fraction length (Tf). Two different arrangements of the same set of radiation fields were applied to low and high a/b cell lines at a high dose/fx and long Tf; a low a/b line was subjected to the same ... |
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| Timing of Increasing Electron Counts From Geosynchronous Orbit to Low Earth Orbit |
JAN 2005 |
100 pages |
| Authors:
Kirk M. Olson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Under certain conditions, high energy electron fluxes can increase over short periods of time in the outer radiation belt and diffuse to low altitudes. Sudden increases of high energy electron densities at low altitudes can drastically damage unsuspecting low-earth-orbit satelites. The progression of electron flux increases from a geosynchronous orbit to low-earth orbit during an electron event is somewhat unknown. If the beginning of electron flux increases at low-earth-orbits could ... |
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| Diagnostic Biodosimetry Response for Radiation Disasters: Current Research and Service Activities at AFRRI |
JUN 2004 |
17 pages |
| Authors:
P. G. Prasanna; J. M. Muderhwa; A. C. Miller; M. B. Grace; C. A. Salter; W. F. Blakely; ARMED FORCES RADIOBIOLOGY RESEARCH INSTBETHESDA MD
|
| This paper addresses the importance of diagnostic radiation dose assessment to help develop a treatment strategy within days of a catastrophe. The long-range goals of the Armed Forces Radiobiology Research Institute (AFRRI) Biological Dosimetry Team are to develop validated radiation biodosimeters and to equip medical personnel with diagnostic information (clinical signs and symptoms, physical dosimetry, etc.) germane to the medical management of human radiation casualties. Our specific objectives are (a) ... |
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| Installation and Operation of Particle Transport Simulation Programs to Model the Detection and Measurement of Space Radiation by Space-Borne Sensors |
25 SEP 2003 |
44 pages |
| Authors:
Stanley Woolf; ARCON CORP WALTHAM MA
|
| This document is a report of the work performed during the period 10 Aug 1999 - 31 Aug 2003 in the areas of: (1) research, evaluation and adaptation of particle transport simulation programs for modeling the detection and measurement of space radiation by space-borne sensors; (2) the transfer of this particle transport simulation capability to the Air Force Research Laboratory, Space Weather Center of Excellence (AFRL/VSBXR); (3) construction of realistic ... |
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| Digital Mammography Breast Dosimetry Using Copper-Doped Lithium Fluoride (LiF:MCP) Thermoluminescent Dosimeters (TLDs) |
18 JUN 2003 |
62 pages |
| Authors:
John J. Tomon; UNIFORMED SERVICES UNIV OF THE HEALTH SCIENCES BETHESDA MD
|
| The determination of mean glandular dose (MGD) to the breast is an essential aspect of mammography equipment evaluations and exposure controls. The American College of Radiology (ACR) Quality Control Manual outlines the procedure for MGD determination in screen-film mammography based upon conversions of entrance skin exposures (ESEs) measured with an ionization chamber (IC). The use of digital mammography has increased because of the need for improved object resolution and tissue ... |
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| DEVELOPMENT AND TEST OF FREE SPACE ELECTRIC FIELD SENSORS WITH MICROVOLT SENSITIVITY, |
FEB 2002 |
|
| Authors:
M. A. KRUPKA; R. MATTHEWS; C. SAY; A. D. Hibbs; G. D. DELORY; QUANTUM APPLIED SCIENCE AND RESEARCH INC SAN DIEGO CA
|
 | (U) THIS PAPER DESCRIBES THE DEVELOPMENT OF A SOLID STATE ELECTRIC POTENTIAL SENSOR USING AN INPUT FEEDBACK CIRCUIT THAT ENABLES STABILITY TO DC, AND HAVE FREQUENCY INDEPENDENT DETECTION. USING ANTENNAS SPACED 50 CM APART THE PAPER REPORTS HIGH SENSITIVITY DETECTION. BELOW 10 HZ THE SENSITIVITY REPORTED APPEARS TO BE DOMINATED BY NOISE DUE TO SINGLE CHARGED DUST IMPACT EVENTS. THE PAPER DISCUSSES TRADEOFFS IN SENSOR DESIGN, THE MAGNITUDE AND SPATIAL ... |
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| MAGNETIC SENSORS AND THEIR UNIQUE APPLICATIONS, |
FEB 2002 |
|
| Authors:
J. Lenz; HONEYWELL INC MINNEAPOLIS MN
|
| (U) THIS PAPER IS A REPRESENTATION OF THE SUBJECT THROUGH THE SLIDES PRESENTED AT THE MEETING. THE SLIDES ARE FIGURES SHOWING PICTORIALLY APPLICATIONS CONCERNING POSITION SENSING, MAGNETIC ANOMALY DETECTION, COMPASSING, AND CURRENT SENSING. |
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| 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 ... |
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| Installation and Operation of Particle Transport Simulation Programs to Model the Detection and Measurement of Space Radiation by Space-Borne Sensors |
03 JAN 2002 |
98 pages |
| Authors:
Stanley Woolf; ARCON CORP WALTHAM MA
|
| This is a report of technical progress made during 1 Aug 00 to 31 Jul 01 in the areas of: (1) research and evaluation of particle transport simulation programs for modeling the detection and measurement of space radiation by space- borne sensors; (2) construction of realistic flight sensor computer models; (3) performance of particle transport calculation; (4) analysis of transport simulation results, including single particle tracking; (5) addition of new ... |
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| Comparison of Radiation Response of LiF:MgCuP and A12O3:C thermoluminescent Dosimeters |
OCT 2001 |
|
| Authors:
L. S. Erhardt; L. Prud'homme-Lalonde; T. Cousins; D. Estan; B. Hoffarth; DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
|
| A study was conducted comparing the properties of two types of thermoluminescent dosimeters (TLDs): LiF:MgCuP (TLD-100H) and Al2O3:C (TLD-500). This was done in order to determine which is better suited for the dosimetry requirements of the Radiation Effects Group at DREO (RE/DREO). The dose and energy response of the TLDs were measured by exposing them to a wide range of photon doses and energies. In addition, the sensitivity of the ... |
|
| Structural Technology and Analysis Program (STAP) Delivery Order 0004: Durability Patch |
JUN 2001 |
142 pages |
| Authors:
Roy Ikegami; Eric Haugse; Angela Trego; Lynn Rogers; Joe Maly; BOEING PHANTOM WORKS SEATTLE WA OPEN SYSTEMS ARCHITECTURE
|
| Structural cracks in secondary structure, resulting from a high cycle fatigue (HCF) environment, are often referred to as nuisance cracks. This type of damage can result in costly inspections and repair. The repairs often do not last long because the repaired structure continues to respond in a resonant fashion to the environment. Although the use of materials for passive damping applications is well understood, there are few applications to high-cycle ... |
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| In Vivo, Fiberoptic-Coupled Radiation Dose Verification System for Prostate Radiotherapy |
APR 2001 |
45 pages |
| Authors:
Brian L. Justus; NAVAL RESEARCH LAB WASHINGTON DC
|
| A fiberoptic-coupled patient dose verification system has been successfully developed that provides real-time dose rate and total dose information during radiotherapy treatments. The system has up to seven channels that can simultaneously provide dosimetry data at seven locations inside the body, at and near the prostate. The spatial resolution of the dose measurements is less than a millimeter. The fiberoptic-coupled system utilizes novel, optically stimulated luminescence (OSL) glass fiber dosimeters ... |
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| In Vivo, Fiberoptic-Coupled Radiation Dose Verification System for Prostate Radiotherapy |
OCT 2000 |
45 pages |
| Authors:
Brian L. Justus; NAVAL RESEARCH LAB WASHINGTON DC
|
| A fiberoptic-coupled patient dose verification system has been successfully developed that can provide real-time dose rate and total dose information during radiotherapy treatment of the prostate. The system can have up to seven channels that can simultaneously provide dosimetry data at seven locations inside the body, at and near the prostate. The spatial resolution of the dose measurements is less than a millimeter. The fiberoptic-coupled system utilizes novel, optically stimulated ... |
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| Small On-Board Environmental Diagnostic Sensors Package (SOBEDS) |
14 FEB 2000 |
26 pages |
| Authors:
Robert H. Redus; Alan C. Huber; Phil D'Entremont; John O. McGarity; David J. Sperry; AMPTEK INC BEDFORD MA
|
| The Small On-Board Environmental Sensors Package (SOBEDS) is a suite of spacecraft instruments designed to measure ionizing radiation in the near- Earth space environment. The purpose of data gathered by the SOBEDS instrument is to improve the understanding of the Earth's radiation belts and the effect of ionizing radiation on Air Force space systems. This report is concerned with the experimental and computational effort in the design ... |
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| Compact Environmental Anomaly Sensor (CEASE) Flight Integration Support Contract |
29 JUL 1999 |
17 pages |
| Authors:
Marilyn R. Oberhardt; Robert H. Redus; John O. McGarity; David J. Sperry; Scott J. Moran; AMPTEK INC BEDFORD MA
|
| The outer space environment experienced by modern, electronically sophisticated spacecraft can be very hostile due to interactions between complex, sensitive electronics systems and the naturally occurring energetic particle population indiginous to the solar system. The Compact Environmental Anomaly System (CEASE) has been developed as a small, low-power device to monitor space "weather" and to provide autonomous warnings of conditions that may cause operational anomalies in the host spacecraft. CEASE uses ... |
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| Compact Environmental Anomaly Sensor (CEASE) Flight Integration Support Contract |
04 AUG 97 |
20 pages |
| Authors:
Bronislaw K. Dichter; John O. McGarity; Marilyn R. Oberhardt; David J. Sperry; Wallace Everest; AMPTEK INC BEDFORD MA
|
| The outer space environment experienced by a modern, electronically sophisticated spacecraft can be very hostile due to interactions between its complex, sensitive electronics systems and the naturally occurring energetic particle population indiginous to the solar system. The Compact Environmental Anomaly System (CEASE) has been developed as a small, low-power device to monitor space 'weather' and to provide autonomous warnings of conditions that may cause operational anomalies in the host spacecraft. ... |
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| Durability Patch: Repair and Life Extension of High Cycle Fatigue Damage on Secondary Structure of Aging Aircraft |
JUL 1997 |
32 pages |
| Authors:
Lynn C. Rogers; Joseph R. Maly; Ian R. Searle; Roy Ikegami; Wes Owen; Robert W. Gordon; David Conley; CSA ENGINEERING INC MOUNTAIN VIEW CA
|
| The Durability Patch Program addresses the repair and life enhancement of nuisance cracks which have been induced into secondary structure by resonant high cycle fatigue from aerovibroacoustics. For this type of damage, safety of flight concerns are virtually non-existant, but maintenance and repair costs are high. Conventional repair techniques consist of mechanically fastened, single sided doublers. For significant static in-plane loads and/or for significant vibration levels due to out-of-plane dynamic ... |
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| Normal and Ischemic Myocardial Transport Kinetics for Bis(N-ethoxy, N- ethyl Dithiocarbamato) Ditrido Technetium-99m (NOET) |
09 JAN 97 |
78 pages |
| Authors:
Terrance A. Harms; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Recently a new Tc-99m labeled compound bis(N-ethoxy, N-ethyl dithiocarbamato) nitrido Tc-99m, or NOET, has been designed to evaluate regional myocardial blood flow and cellular viability. Previous studies of NOET indicate that it has the potential for use as a perfusion agent for assessing myocardial viability. These studies however were not designed to evaluate the actual kinetics of this agent. In the present study, Thermoluminscent Dosimeter (TLD) analysis was used in ... |
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| Ground Cloud Dispersion Measurements During The Titan IV Mission #K21 (6 November 1995) at Cape Canaveral Air Station |
21 JUN 96 |
97 pages |
| Authors:
AEROSPACE CORP EL SEGUNDO CA
|
| Launch cloud imagery, ground-level HCl measurements, and meteorological data recorded during the 00:15 EST launch of a Titan IV vehicle at Cape Canaveral Air Station (CCAS) on 6 November 1995 (mission #K21) are presented. These data will be used to determine how accurately the Rocket Exhaust Effluent Diffusion Model (REEDM) can predict toxic hazard launch corridors. Infrared imagery showed that the ground cloud stabilized at a height of 1375 m ... |
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| Ground Cloud Dispersion Measurements during the Titan IV Mission Number K19 (10 July 1995) at Cape Canaveral Air Station |
22 MAR 96 |
120 pages |
| Authors:
AEROSPACE CORP EL SEGUNDO CA
|
| Launch plume imagery and ground-level HCI measurement results and meteorological data determined during the launch of a Titan IV vehicle at Cape Canaveral Air Station (CCAS) on 10 July 1995 (mission #K19) are presented. These data will be used to determine the accuracy of the Rocket Exhaust Effluent Diffusion Model (REEDM). The imagery data, recorded from three camera sites, show that the ground cloud blew out to sea with a ... |
|
| Ground Cloud Dispersion Measurements During the Titan IV Mission #K23 (14 May 1995) at Cape Canaveral Air Station. Volume 1 - Test Overview and Data Summary |
27 FEB 96 |
199 pages |
| Authors:
AEROSPACE CORP EL SEGUNDO CA TECHNOLOGY OPERATIONS
|
| Launch plume imagery, airborne and ground-level HCl measurement results and meteorological data determined during the launch of a Titan IV vehicle at Cape Canaveral Air Station (CCAS) on 14 May 1995 (mission #K23) are presented. These data will be used to determine the accuracy of the Rocket Exhaust Effluent Diffusion Model (REEDM). The imagery and aircraft-based HCl measurements indicate that the plume separated into ground-cloud and launch- column segments below ... |
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| Thermoluminescence Radiation Dosimetry Using Transparent Glass Containing Nanocrystalline Phosphor. |
08 FEB 1996 |
25 pages |
| Authors:
Brian L. Justus; Alan L. Huston; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| Radiation is detected using a light transparent thermoluminescent dosimeter that comprises a nanocrystalline phosphor dispersed in a light transparent glassy matrix, such as Vycor glass. The dosimeter is placed in an environment in which radiation is present for a period of time, removed from the environment and then heated to emit light, the intensity of which is indicative of the radiation dose. The method of the invention is useful for ... |
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| The PASPlus Survey Graphics Package -- Applications and Design Elements |
19 SEP 95 |
19 pages |
| Authors:
John R. Palys; Dennis E. Delorey; BOSTON COLL CHESTNUT HILL MA INST FOR SCIENTIFIC RESEARCH
|
| This report describes the PASPlus Survey Graphics Package, which displays data from the full complement of instrumentation comprising the PASPlus payload, along with ephemeris and spacecraft state-of-health information. Graph types include instantaneous I-V curves for all sixteen of the research solar arrays, along with derived and ancillary information; biased-array current-loss data, as a time series; all parameters from the data-rich Transient Pulse Monitor, from which can be derived arcing rates ... |
|
| Ground Cloud Dispersion Measurements during the Titan IV Mission, Number K14 (22 December 1994) at Cape Canaveral Air Station |
15 JUN 95 |
80 pages |
| Authors:
AEROSPACE CORP EL SEGUNDO CA SPACE LAUNCH OPERATIONS
|
| Results of launch cloud imagery and ground-level HCl measurements performed at Cape Canaveral Air Station (CCAS) during the launch of a Titan IV vehicle from Complex 40 on 22 December 1994 are presented. Meteorological data measured at numerous CCAS locations prior to launch and during dispersion of the launch cloud are also presented. Such data will be used to determine how accurately atmospheric dispersion models such as the Rocket Exhaust ... |
|
| Radiation Belt Analysis and Modeling |
22 APR 95 |
158 pages |
| Authors:
J. N. Bass; U. DasGupta; C. A. Hein; J. M. Griffin; D. S. Reynolds; RADEX INC BEDFORD MA
|
| Efforts have been conducted in modeling of radiation belts, and cosmic radiation, principally in connection with the CRRES mission. Statistical studies of solar particle events have been conducted in a search for predictors of the occurrence of geomagnetic storms. Certain spectral and temporal properties of protons and electrons were found to correlate with the occurrence of storms. Comparative studies of solar proton fluxes observed at locations inside (using CRRES and ... |
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| Detailed Component Design for a Compact Environmental Anomaly Sensor (CEASE): Mechanical Design and Calibration |
17 APR 95 |
22 pages |
| Authors:
Bronislaw K. Dichter; David Sperry; John O. McGarity; Hugh Anderson; Alan C. Huber; AMPTEK INC BEDFORD MA
|
| The outer space environment experienced by a modern, electronically sophisticated spacecraft can be very hostile due to interactions between its complex, sensitive electronics systems and the naturally occurring energetic particle population indigenous to the solar system. The Compact Environmental Anomaly Sensor (CEASE) is being developed as a small, low-power device to monitor space "weather" and provide autonomous warnings of conditions that may cause operational anomalies in a host spacecraft. CEASE ... |
|
| Controlling Waste Anesthetic Gases |
DEC 94 |
20 pages |
| Authors:
Edward J. Primeau; ARMSTRONG LAB BROOKS AFB TX OCCUPATIONAL AND ENVIRONMENTAL HEALTH DIRECTORATE
|
| This technical report provides Bioenvironmental Engineers (BEEs) with information to effectively manage potential waste anesthetic gas hazards. It supplements Air Force Occupational Safety and Health (AFOSH) Standard 48-8, Controlling Exposures to Hazardous Materials. |
|
| Develop and Fabricate a Radiation Dose Measurement System for Satellites |
NOV 94 |
53 pages |
| Authors:
Paul R. Morel; Frederick Hanser; Jeff Belue; Ram Cohen; PANAMETRICS INC WALTHAM MA
|
| A second generation Dosimeter has been designed to fulfill the need for accurate radiation dose measurements. Two identical Dosimeters, a flight unit and a backup unit, have been fabricated, tested and calibrated. The backup Dosimeter was integrated into the payload of the Advanced Photovoltaic and Electronic Experiments (APEX) satellite, as part of the Photovoltaic Array Space Power Plus Diagnostics (PASP Plus) experiment. APEX was launched shortly after 1430 UT on ... |
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| PASP Plus Time History Data Base File Structures |
19 SEP 94 |
68 pages |
| Authors:
Dennis E. Delorey; BOSTON COLL CHESTNUT HILL MA INST FOR SPACE RESEARCH
|
| A Time History Data Base (THDB) is to be developed for the Photovoltaic Array and Space Power Experiment - Plus Diagnostics (PASP+) sensor package flown aboard the APEX satellite. A THDB system has been developed for the generation and display of the THDB data. |
|
| Radiation Detection Equipment (RDE) Comparative Evaluation Test Program. Volume 1. Point Source Measurements |
01 AUG 94 |
100 pages |
| Authors:
John H. McNeilly; Bernice D. Rothstein; SCIENCE APPLICATIONS INTERNATIONAL CORP NEWINGTON VA CENTER FOR VERIFICATION RESEARCH*
|
| Radiation detection equipment (RDE) will be used under the START treaty to verify that air-launched cruise missiles (ALCM) declared to be non- nuclear do not contain nuclear warheads and to verify that certain containers do not contain radiation attenuating material. Under the Intermediate-Range Nuclear Forces (INF) Treaty, neutron RDE was used and it is proposed that the same RDE be used for the START Treaty. However, the On-Site Inspection Agency ... |
|
| An Investigation of Nonuniform Dose Deposition From an Electron Beam |
AUG 94 |
17 pages |
| Authors:
William Lilley; Kieu X. Luu; ARMY RESEARCH LAB ADELPHI MD
|
| in a search for an explanation of nonuniform electron-beam dose deposition, the integrated TIGER Series (ITS) of coupled electron/photon Monte Carlo transport codes was used to calculate energy deposition in the package materials of an application-specific integrated circuit (ASIC) while the thicknesses of some of the materials were varied. The thicknesses of three materials that were in the path of an electron-beam pulse were varied independently so that analysis could ... |
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| Detailed Component Design for a Compact Environmental Anomaly Sensor (CEASE) |
25 MAR 94 |
74 pages |
| Authors:
John O. McGarity; Alan C. Huber; John A. Pantazis; David J. Sperry; Hugh Anderson; AMPTEK INC BEDFORD MA
|
| The outer space environment experienced by a modern, electronically sophisticated spacecraft can be very hostile due to interaction between its complex, sensitive electronics systems and the naturally occuring energetic particle population indigenous to the solar system. The Compact Environmental Anomaly Sensor (CEASE) is being developed as a small, low-power device to monitor space 'weather' and provide autonomous warnings of conditions that may cause operational anomalies in a host spacecraft. CEASE ... |
|
| A HIFX Electron-Beam Dosimetry System. |
FEB 1994 |
23 pages |
| Authors:
Gregory K. Ovrebo; Steven M. Blomquist; Steven R. Murrill; ARMY RESEARCH LAB ADELPHI MD
|
| The U.S. Army Research Laboratory has developed a dosimetry system for use with the High-intensity Flash X-ray (HIFX) facility and the custom low-noise test fixture used to perform radiation tests of integrated circuits in vacuum. When the flash x-ray is used in its electron-beam mode, dose rates greater than 10(exp13) rads(Si)/s are achievable. This dose rate is above the useful limit of more conventional dosimetric methods, such as thermoluminescent dosimeters ... |
|
| CRRES High Energy Proton Flux Map |
JAN 94 |
9 pages |
| Authors:
M. S. Gussenhoven; E. G. Mullen; C. Hein; J. Bass; D. Madden; BOSTON COLL CHESTNUT HILL MA INST FOR SPACE RESEARCH
|
| Proton flux maps of near-Earth space are presented using the Proton Telescope (PROTEL) detector on CRRES. The proton energy range covered is 1 - 100 MeV. Contamination of PROTEL measurements due to > 100 MeV protons is corrected using loss cone data, resulting on consistency with dosimeter measurements and a Monte Carlo computer model of PROTEL. Two states of the inner magnetosphere were found during the CRRES mission, a quiet ... |
|
| CRRES High Energy Proton Flux Maps. |
JAN 1994 |
|
| Authors:
M. S. Gussenhoven; E. G. Mullen; M. D. Violet; C. Hein; J. Bass; D. Madden; BOSTON COLL CHESTNUT HILL MA INST FOR SPACE RESEARCH
|
| Proton flux maps of near-Earth space are presented using the Proton Telescope (PROTEL) detector on CRRES. The proton energy range covered is 1 - 100 MeV. Contamination of PROTEL measurements due to > 100 MeV protons is corrected using loss cone data, resulting in consistency with dosimeter measurements and a Monte Carlo computer model of PROTEL. Two states of the inner magnetosphere were found during the CRRES mission, a quiet ... |
|
| The PROTEL Contamination Code |
31 JUL 93 |
31 pages |
| Authors:
C. A. Hein; RADEX INC BEDFORD MA
|
| The Proton Telescope (PROTEL) was one of several instruments used to measure the proton populations encountered by the Combined Radiation and Release Experimental Satellite (CRRES) in its 15 months of successful operation. In the radiation environment encountered by CRRES, the PROTEL instrument was subjected to 'contamination' caused by the penetration of high energy protons passing through the instrument outside its nominal aperture, falsely trigger a valid detection response. The PROTEL ... |
|
| The PROTEL Contamination Code. |
31 JUL 1993 |
|
| Authors:
C. A. Hein; RADEX INC BEDFORD MA
|
| The Proton Telescope (PROTEL) was one of several instruments used to measure the proton populations encountered by the Combined Radiation and Release Experimental Satellite (CRRES) in its 15 months of successful operation. In the radiation environment encountered by CRRES, the PROTEL instrument was subjected to 'contamination' caused by the penetration of high energy protons passing through the instrument outside its nominal aperture, falsely trigger a valid detection response. The PROTEL ... |
|
| Develop and Fabricate a Radiation Dose Measurement System for Satellites. |
JUL 1993 |
|
| Authors:
Paul R. Morel; Frederick Hanser; Jeff Belue; Ram Cohen; PANAMETRICS INC WALTHAM MA
|
| A second generation dosimeter is being designed to fulfill the need for accurate radiation dose measurements. Two identical dosimeters, a flight unit and a backup unit, are being fabricated, tested and calibrated. The flight dosimeter is to be integrated into the payload of the Advanced Photovoltaic Electronic Experiment (APEX) satellite, as part of the Photovoltaic Array Space Power Plus Diagnostics (PASP Plus) experiment. |
|
| NMR Characterization of Polymers Formed in Diazotizing Mixtures of Luminol and 3-Amino-L-tyrosine |
24 MAY 93 |
52 pages |
| Authors:
John R. Wright; SOUTHEASTERN OKLAHOMA STATE UNIV DURANT DEPT OF PHYSICAL SCIENCES
|
| A melanin-like polymer was prepared by diazotizing luminol (5-amino- 2,3-dihydro-1, 4-phthalazinedione) and 3-amino-L-tyrosine in a mixed water/ dimethylsulfoxide solvent; this was followed by acetone precipitation and aging of the solid residue for a month (the polymer forms slowly in the solid residue) . An aqueous solution containing 0.50 F NaOH, 0.0011 M luminol, 0.010 F potassium formate and the polymer at a concentration of 0.050 mg/mL was observed to undergo ... |
|
| Modeling the DMSP and CRRES Dosimeters Using the Path Length Distribution Method. |
14 MAY 1993 |
|
| Authors:
C. A. Hein; J. N. Bass; RADEX INC BEDFORD MA
|
| The Path Length Distribution method is used to model the dosimeter instruments used aboard the DMSP and the CRRES satellites. The Monte Carlo methods used to compute the path length distributions for the isotropic, mirror plane, and sin(N) alpha pitch angle proton angular distributions (N = 4, 6, 8 and N = 999 (for comparison with the Mirror Plane Distribution)) are described. The path length distributions are used to compute ... |
|
| Characterizing Noise Fields in Shipboard Spaces |
29 APR 93 |
19 pages |
| Authors:
R. J. Sylvester; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| Three methods of characterizing discrete tone sound fields were tested in a reverberant compartment. Method one uses sound field mapping, method two implements an integrating sound level meter, and method three uses personal noise dosimetry. Sound field mapping resulted in a detailed and accurate visual representation of the sound field, but because the procedure is both complicated and time consuming, it is not appropriate for day-today analysis of compartments. The ... |
|
| Analysis of Geophysical Measurements and Spacecraft Interactions |
29 JAN 93 |
286 pages |
| Authors:
J. N. Bass; K. H. Bhavnani; N. A. Bonito; K. H. Bounar; P. L. Grady; RADEX INC BEDFORD MA
|
| Investigations were supported to analyze geophysical measurements with integrated applications of ephemerides physics, and mathematics of the ionosphere and near space. Projects undertaken included analytical and computational simulation of spacecraft interactions processes associated with charging, contamination, liquid venting, and critical ionization velocity; data based and analytical investigations of trapped particles, dosage, magnetic fields and instrumentation for the CRRES experiment; data based studies of auroral electron and ion precipitation including neural ... |
|
| Space Systems Environmental Interaction Studies |
12 JAN 93 |
36 pages |
| Authors:
M. A. Morgan; Alan C. Huber; John O. McGarity; David J. Sperry; Scott J. Moran; AMPTEK INC BEDFORD MA
|
| Under Task 1, the Photovoltaic Array Space Power Plus Diagnostics PASP Plus experiment, encompassing most of Amptek's effort in the report period, Amptek has: (1) designed and built the experiment Controller; (2) provided an Electrostatic Analyzer (ESA), two QCMs, and three calorimeters (CALs); (3) worked with PL/GPSP on testing and integrating PASP Plus into the APEX satellite; and (4) provided Ground Support Equipment for spacecraft integration and mission operation. The ... |
|
| Detailed Component Design for a Compact Environmental Anomaly Sensor (CEASE) |
16 NOV 92 |
56 pages |
| Authors:
Alan C. Huber; John O. McGarity; Paul Okun; John A. Pantazis; David Sperry; AMPTEK INC BEDFORD MA
|
| As the size and sophistication of spacecraft have increased, anomalies in operational performance caused by the interaction of the energetic- particle population and the spacecraft have likewise increased. The Compact Environmental Anomaly Sensor (CEASE) is being developed as a small, low-power device to monitor space weather and provide autonomous warning of conditions that could cause operational anomalies. Based on the sensor-design and trade-off studies for CEASE, a dosimeter set consisting ... |
|
| Measuring Hearing Protection Device Performance Using the Metrosonics db-3100 Sound Level Analyzer(Dosimeter) |
NOV 92 |
23 pages |
| Authors:
Andrew T. Wells; Phillip L. Hopper; ARMSTRONG LAB BROOKS AFB TX
|
| This report provides detailed operating instructions to be used by base-level bioenvironmental engineers and technicians to determine appropriate personal hearing protection devices (HPD) and to calculate allowable exposure times for individuals wearing different HPDs in hazardous noise. In addition, this report presents a computer program that uses dosimeter time histories from Metrosonics noise dosimeters to streamline and increase the accuracy of HPD assessments.... Noise, Hearing Protection, Noise Control. |
|
| Supplement to Audit Report 91-029- Utilization of the William Langer Jewel Bearing Plant |
31 AUG 1992 |
99 pages |
| Authors:
INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA
|
| Having fully considered management responses to Report No. 91-029 as well as the results of our follow-on work, we revised the thrust of our recommendations. Essentially, we recommended that the Assistant Secretary of Defense (Production and Logistics) take the following sequence of actions: establish qualitative and quantitative requirements that will result in the optimum use of the facility, establish criteria for stockpiling jewel bearings, ... |
|
| Radiation Surveys of the Naval Postgraduate School LINAC |
JUN 92 |
108 pages |
| Authors:
David F. Davidson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The NPS LINAC was initially designed for use in radiation damage and nuclear structure studies. The LINAC's role has subsequently evolved to include research in a variety of other areas such as the generation of coherent microwave, optical, and x- radiation. The use of high energy electrons produces a radiation environment for which personnel and equipment safety must be addressed. It is the purpose of this study to measure the ... |
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| Assessing Hearing Protector Device Performance and Calculating Allowable Exposure Durations in Hazardous Noise |
APR 92 |
29 pages |
| Authors:
John G. Schleifer; Terry M. Fairman; ARMSTRONG LAB BROOKS AFB TX
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| This report reviews procedures used by base-level bioenvironmental engineers and technicians to determine appropriate personal hearing protection devices (HPD) and to calculate allowable exposure times for individuals wearing different HPDS in hazardous noise. Limitations of these procedures are discussed, and a preferred method is presented. Additionally, this report presents a BASIC program for use with noise dosimeter time history data which simplifies all the required calculations. Noise, Hearing Protection, Noise ... |
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| Analysis and Modeling of the CRRES Satellite Data |
20 MAR 92 |
110 pages |
| Authors:
J. N. Bass; C. A. Hein; C. E. Jordan; R. P. Vancour; RADEX INC BEDFORD MA
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| The radiation belts consist of energetic charged particles trapped by the Earth's magnetic field which consists of an internal field and an external field. The external field dominates the non-dipole portions of the internal field at and above geosynchronous altitude. External field modeling usually begins with models of the various current systems from which the field is derived. CRRES data provides for a generation of new models of the radiation ... |
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| PASP Plus: An Experiment to Measure Space-Environment Effects on Photovoltaic Power Subsystems, |
05 MAR 1992 |
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| Authors:
Donald A. Guidice; PHILLIPS LAB KIRTLAND AFB NM
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| The Photovoltaic Array Space Power Plus Diagnostics experiment (PASP Plus for short) has been accepted as part of the APEX mission payload aboard a Pegastar satellite to be orbited by a Pegasus launch vehicle in late 1992. The mission's elliptical orbit (190 nmi perigee, 1000 nmi apogee, nominal) will allow us to investigate both space plasma and space radiation effects. PASP Plus will have eleven types of solar arrays and ... |
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