A5035758860- Solar and Space Plasma Dynamics
- Radiation Therapy and Dosimetry
- Dark Matter and Cosmic Phenomena
- Radiation Effects in Electronics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Graphite, nuclear technology, radiation studies
- Spacecraft Design and Technology
- Neutrino Physics Research
- Atmospheric Ozone and Climate
- Nuclear Physics and Applications
- Planetary Science and Exploration
- Geomagnetism and Paleomagnetism Studies
- Radioactivity and Radon Measurements
- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Particle physics theoretical and experimental studies
- Solar Radiation and Photovoltaics
- Space exploration and regulation
- Calibration and Measurement Techniques
- Scientific Research and Discoveries
- Superconducting and THz Device Technology
Fifth Gait Technologies (United States)
2018-2023
University of Canterbury
2020
Marshall Space Flight Center
2005-2018
European Space Astronomy Centre
2016
University of Alabama in Huntsville
2008-2016
RIKEN Advanced Science Institute
2016
Universidad de León
2016
Instituto Nacional de Técnica Aeroespacial
2016
Universidad Politécnica de Madrid
2016
Science and Technology Facilities Council
2016
CREME96 is an update of the Cosmic Ray on Micro-Electronics code, a widely-used suite programs for creating numerical models ionizing-radiation environment in near-Earth orbits and evaluating radiation effects spacecraft. CREME96, which now available over World-Wide Web (WWW) at http://crsp3.nrl.navy.mil/creme96/, has many significant features, including: (1) improved galactic cosmic ray, anomalous solar energetic particle ("flare") components environment; (2) geomagnetic transmission...
The authors review various single event effects (SEE) testing and rate prediction methodologies recommend standard approaches. This discussion is limited to upset (SEU) for direct-ionization-induced effects. approach being recommended based partially on a different way of viewing the results SEU cross-section measurements. measurements are not measuring distribution cross-sections. They device sensitivities, due differences sensitive region critical charges charge collection. linear energy...
Progression of VLSI circuitry to smaller feature sizes raises questions about an increased severity the cosmic ray upset problem. In this paper we present a simple method calculating rates. We compare results exact calculation and apply both methods prediction rates as device are scaled submicron dimensions. The calculations presented for several environmental predictions. then discuss critical charge function size. consider versus scale parameter size charge. conclude that do not increase...
The RADSAFE simulation framework is described and applied to model SEU in a 0.25 mum CMOS 4 Mbit SRAM. For this circuit, the approach produces trends similar those expected from classical rectangular parallelepiped models, but more closely represents physical mechanisms responsible for SRAM circuit.
We describe a tool suite, CRÈME, which combines existing capabilities of CREME96 and CREME86 with new radiation environment models Monte Carlo computational for single event effects total ionizing dose.
A series of measurements 5–30 MeV/nucleon oxygen ions made with track detector stacks on Cosmos satellites show isotropic angular distributions during solar energetic particle events. Solar‐quiet times, the other hand, have highly anisotropic suggestive a trapped‐particle component. Detailed Monte Carlo simulations confirm this interpretation and allow us to measure trapped cosmic‐ray contributions observed fluxes. Our data are fully consistent anomalous ions, rather than radial diffusion...
The natural radiation environment varies drastically with solar activity, geomagnetic shielding and material shielding. This variability is reflected in the single event upset rates to be expected on various spacecraft.
Solar flare particle events pose the most extreme SEU producing environment. The severe aspects of several flares have been combined to produce a model for composite worst-case event. This is proposed as standard design spacecraft that must operate without interruption.
The natural radiation environment in space has been shown to produce soft upsets satellite-borne microelectronics. This varies with time, position the earth's magnetosphere and depth inside spacecraft. nature of these variations will be described uncertainties that result from deficiencies our basic knowledge discussed. Only those components can cause considered this report.
Direct charge collection measurements are presented, which prove that the presence of tungsten near sensitive volumes leads to extreme events through nuclear reactions. We demonstrate that, for a fixed incident particle linear energy transfer (LET), increasing beyond certain point causes decrease in reaction-induced collection. This suggests worst-case exists single-event effect (SEE) susceptibility, depends on technology, device layout, and ions' LET value. A Monte Carlo approach...
Voyager 1 (V1) spacecraft observed electrons of 6–14 MeV in the heliosheath which showed several enhancements significant flux variation. We compare these temporal electron variations, from time when V1 crossed termination shock (TS) up to mid-2008, with dynamical phenomena that are obtained our MHD simulations based on 2 (V2) solar-wind data. Our indicate all enhancements, except for one, correspond fairly well times a magnetosonic (MS) pulse was driven downstream TS due collision...
Contributions of the JEM-EUSO Collaboration to 32nd International Cosmic Ray Conference, Beijing, August, 2011.
The main goal of the JEM-EUSO experiment is study Ultra High Energy Cosmic Rays (UHECR, 1019−1021 e V), but method which will be used (detection secondary light emissions induced by cosmic rays in atmosphere) allows to other luminous phenomena. UHECRs detected through measurement emission range between 290 and 430 m, where some part Transient Luminous Events (TLEs) also appears. This work discusses possibility using Telescope get new scientific results on TLEs. high time resolution this...
The Radiation Hardened Electronics for Space Environments (RHESE) project develops advanced technologies needed high performance electronic devices that will be capable of operating within the demanding radiation and thermal extremes space, lunar, Martian environment. developed under this enhance enable avionics multiple mission elements NASA's Vision Exploration, including Constellation program's Orion Crew Exploration Vehicle, Lunar Lander project, Outpost elements, Extra Vehicular...