William Atwell
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View article: Beamline and Flight Comparisons of the ARMAS Flight Module With the Tissue Equivalent Proportional Counter for Improving Atmospheric Radiation Monitoring Accuracy
Beamline and Flight Comparisons of the ARMAS Flight Module With the Tissue Equivalent Proportional Counter for Improving Atmospheric Radiation Monitoring Accuracy Open
Ionizing radiation at aircraft and commercial suborbital spaceflight altitudes is driven by space weather and is a health concern for crew and passengers. We compare the response functions of two radiation detectors that were exposed to fo…
View article: The AE-9 Trapped Electron Model Radiation Environment and Effects on Electronics for Several Shielding Configurations
The AE-9 Trapped Electron Model Radiation Environment and Effects on Electronics for Several Shielding Configurations Open
William Atwell, Retired Boeing Technical Fellow, USA
View article: Influence of Aircraft Self-Shielding on World-Wide Calculations of Effective Dose Rates to Occupants
Influence of Aircraft Self-Shielding on World-Wide Calculations of Effective Dose Rates to Occupants Open
Kyle Copeland, Federal Aviation Administration
View article: Geostationary Space: The Radiation Environment and Effects on Electronics Under Various Shielding Configurations
Geostationary Space: The Radiation Environment and Effects on Electronics Under Various Shielding Configurations Open
William Atwell, Retired Boeing Technical Fellow, USA
View article: Global real-time dose measurements using the Automated Radiation Measurements for Aerospace Safety (ARMAS) system
Global real-time dose measurements using the Automated Radiation Measurements for Aerospace Safety (ARMAS) system Open
The Automated Radiation Measurements for Aerospace Safety (ARMAS) program has successfully deployed a fleet of six instruments measuring the ambient radiation environment at commercial aircraft altitudes. ARMAS transmits real-time data to …
View article: Segmental interpolating spectra for solar particle events and in situ validation
Segmental interpolating spectra for solar particle events and in situ validation Open
It is a delicate task to accurately assess the impact of solar particle events (SPEs) on future long-duration human exploration missions. In the past, researchers have used several functional forms to fit satellite data for radiation expos…
View article: Investigation of the Secondary Neutron Production in Large Space Vehicles for Deep Space
Investigation of the Secondary Neutron Production in Large Space Vehicles for Deep Space Open
Future NASA missions will focus on deep space and Mars surface operations with large structures necessary for transportation of crew and cargo. In addition to the challenges of manufacturing these large structures, there are added challeng…
View article: Investigation of Lithium Metal Hydride Materials for Mitigation of Deep Space Radiation
Investigation of Lithium Metal Hydride Materials for Mitigation of Deep Space Radiation Open
United States
View article: Probability Estimates of Solar Proton Doses During Periods of Low Sunspot Number for Short Duration Missions
Probability Estimates of Solar Proton Doses During Periods of Low Sunspot Number for Short Duration Missions Open
In an earlier paper presented at ICES in 2015, we investigated solar particle event (SPE) radiation exposures (absorbed dose) to small, thinly-shielded spacecraft during a period when the monthly smoothed sunspot number (SSN) was less than…