A5085577497- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Ionosphere and magnetosphere dynamics
- Astrophysics and Star Formation Studies
- Electrohydrodynamics and Fluid Dynamics
- Radiation Therapy and Dosimetry
- Planetary Science and Exploration
- Solar Radiation and Photovoltaics
- Spaceflight effects on biology
- Advanced Sensor Technologies Research
- Nuclear Issues and Defense
- Atmospheric Ozone and Climate
- Advanced Measurement and Metrology Techniques
- Photovoltaic System Optimization Techniques
- Superconducting Materials and Applications
- Spacecraft Design and Technology
- Graphite, nuclear technology, radiation studies
- Structural Health Monitoring Techniques
- Space exploration and regulation
- Space Satellite Systems and Control
- Frailty in Older Adults
- Geophysics and Gravity Measurements
Leidos (United States)
2022-2023
Johnson Space Center
2019-2022
University of New Hampshire
2016-2019
Solar Energetic Particle (SEP) events are interesting from a scientific perspective as they the product of broad set physical processes corona out through extent heliosphere, and provide insight into particle acceleration transport that widely applicable in astrophysics. From operations perspective, SEP pose radiation hazard for aviation, electronics space, human space exploration, particular missions outside Earth's protective magnetosphere including to Moon Mars. Thus, it is critical...
Abstract Interstellar neutrals (ISNs), pick-up ions (PUIs), and energetic neutral atoms (ENAs) are fundamental constituents of the heliosphere its interaction with neighboring interstellar medium. Here, we focus on selected aspects present-day theory modeling these particles. In last decades, progress in understanding role PUIs ENAs for global very local medium is impressive still growing. The increasing number measurements allows verification continuing development theories model attempts....
ABSTRACT Recent observations of the pickup helium focusing cone by STEREO /Plasma and Suprathermal Ion Composition indicate an inflow longitude interstellar wind that differs from IBEX <?CDATA $1\buildrel{\circ}\over{.} 8\pm 2\buildrel{\circ}\over{.} 4$?> . It has been under debate whether transport ions with anisotropic velocity distribution is cause this difference. If so, roughly field-aligned ion streaming relative to solar should create a shift in density cone. A large depends on size...
Abstract We performed the first systematic analysis of pickup ion (PUI) cutoff speed variations, across compression regions and due to fast fluctuations in solar wind (SW) magnetic field strength. This study is motivated by need remove or correct for effects on determination interstellar flow longitude based longitudinal variation PUI cutoff. Using 2007–2014 STEREO A PLASTIC observations, we identified SW accumulated contained velocity distributions a superposed epoch analysis. The shift...
Abstract Inner source pickup ions (PUIs) are believed to be created by the interaction between solar wind and interplanetary dust grains. The production mechanism, however, is not well understood. We use Stopping Range of Ions in Matter Energetic Particle Radiation Environment Module simulate transport inner C + O produced five mechanisms: recycling, neutralization, backscattering, sputtering, sputtering-induced recycling. This first study consider backscattering compare velocity...
Radiation in the form of solar energetic particles (SEPs) presents a severe risk to short-term health astronauts and success human exploration missions beyond Earth's protective shielding. Modeling how shielding mitigates dose accumulated by is an essential step toward reducing these risks. PREDICCS (Predictions radiation from REleASE, EMMREM, Data Incorporating CRaTER, COSTEP, other SEP measurements) online tool for near real-time prediction exposure at Earth, Moon, Mars behind various...
Abstract Inner source pickup ions (PUIs) are thought to be produced by the interaction between solar wind and interplanetary dust particles (IDPs). The amount of PUIs their velocity distribution depend on composition, density, porosity, size IDPs. Quinn et al. simulated production from chondritic porous (CP) study showed that composition CP IDPs nearly resembled wind. purpose this is expand upon smooth (CS) get a more complete description inner PUI production. We simulate transport C + O...
Whitepaper #430 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications; basic research. Additional user-need-driven
Abstract Introduction There is evidence that dedicated units provide comprehensive geriatric assessment can reduce inpatient falls and other iatrogenic harm1. The Emergency Department (ED) in Morriston Hospital has 90,000 attendances a year. 4,000 patients &gt;65 years presented with falls. Between January 2018–November 2021, ED reported 207 incidents of via the Health Board Datix System. Intervention Phase 1 In April 2018, Older Person’s Assessment Service (OPAS) (Geriatrician led...