A5034321878- Radiation Effects in Electronics
- Spacecraft Design and Technology
- Silicon and Solar Cell Technologies
- solar cell performance optimization
- Silicone and Siloxane Chemistry
- Satellite Communication Systems
- Space Satellite Systems and Control
- Photovoltaic System Optimization Techniques
- Ion-surface interactions and analysis
- Ionosphere and magnetosphere dynamics
- Polymer Nanocomposite Synthesis and Irradiation
- Solar and Space Plasma Dynamics
- Luminescence Properties of Advanced Materials
- Atmospheric Ozone and Climate
- Spacecraft and Cryogenic Technologies
- Radiation Detection and Scintillator Technologies
- Semiconductor materials and interfaces
- Aluminum Alloys Composites Properties
- Microwave Dielectric Ceramics Synthesis
- Virtual Reality Applications and Impacts
- Integrated Circuits and Semiconductor Failure Analysis
- Radiation Therapy and Dosimetry
- Scientific Research and Discoveries
- Nonlinear Optical Materials Studies
- High-Velocity Impact and Material Behavior
National Authority for Remote Sensing and Space Sciences
2010-2025
Cairo University
2022
Toyota Technological Institute
2010-2011
Abstract Satellites are exposed to various types of radiation and extreme temperatures in space, which can lead damage malfunctioning critical components. Therefore, the use an efficient shielding system is essential for ensuring longevity performance satellites. In ever-evolving landscape space exploration, demand resilient materials safeguard delicate internal components microsatellites has never been more critical. This work investigated gamma-ray performance, physical mechanical...
Herein, the proposed work reports a simple chemical approach; solution combustion method to synthesize ZnO nanoparticles and Nd-doped (Nd2O3-ZnO) nanocomposites (0.001 g–5 g) using technique. The approach is considered one of environmentally friendly, cost-effective, high yields, most straightforward procedures for rapidly preparing nanomaterials on large scale. prepared nano samples were characterized through standard analytical methods, including scanning electron microscopy (SEM), X-ray...
The simplification of space science and technology for students K–12 is a challenging task educators. Virtual reality augmented are educational techniques that introduce the concept games. Moreover, those have stunning effect on students. This work presents utilization virtual models to teach about satellite types, subsystems, assembly integration process, watching rocket launch carrying observing in its orbit laboratories. A 10-min mission laboratories will effectively improve learning...
This work presents the development and fabrication process of a radiation dosimeter based on Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) technology, known as RadFET. The aim this study is to determine specifications RadFET sensor for use in space missions by Egyptian Space Agency SPNeX mission. We have successfully determined specifications, specified required electronic components readout circuits, confirmed correct operation device through simulations radiation-induced...
One of the fundamental objectives for research and development space solar cells is to improve their radiation resistance. InGaP with low base carrier concentrations under low-energy proton irradiations have shown high resistances. In this study, an analytical model damage subcells based on a approach radiative nonradiative recombinations has been proposed. The resistance as function concentration analyzed by using recombination lifetime coefficient K minority-carrier InGaP. Numerical...
GaAs solar cells with the lower base carrier concentration under low energy proton irradiations had shown experimentally better radiation-resistance. Analytical model based on fundamental approach for radiative and non-radiative recombination has been proposed radiation damage in sub-cells. The resistance of sub-cells as a function analyzed by using lifetime coefficient minority lifetime. Numerical analysis shows good agreement experimental results. effect upon change constant removal rate...
Polymeric composites are widely used in manufacturing the space structures because of their superior light weight compared with either metallic ferrous or non-ferrous materials. These materials should secure high strength to ratio and reasonable thermal and/or optical properties. In this work, selected polymeric matrix reinforced three different types fibers, namely, carbon, fiberglass, Kevlar were manufactured low-cost hand lay-up method. samples irradiated doses γ-rays. prescribed chosen...
In the vacuum deep space, outgassing has contributed to degraded mechanical performance of composite materials used in spacecraft. Three types polymer based material we concerned on this study epoxy resin with carbon fiber, glass and Kevlar, which manufactured by hand lay-up method without autoclave curing is a commercial low cost production. These have been widely satellite structures. The forth polyamide thin sheet layer multilayer insulation for spacecraft protection against space...
Numerical analyses are carried out to optimize radiation resistant of InGaP solar cell under the effect low energy protons. The degradation parameters used investigate configuration, base thickness, junction depth, carrier concentration, and AlInP window layer. for both cells structure n–p p–n shows that, is more in a with shallow (0.05 µm), thin thickness (0.4 µm) concentration (1 ×10 16 cm -3 ), while relatively deep (0.1 concentration. formation layer increases structure, no significant...
Numerical analyses are carried out to optimize radiation resistant of InGaP solar cell under the effect low energy protons. The degradation parameters used investigate configuration, base thickness, junction depth, carrier concentration, and AlInP window layer. for both cells structure n–p p–n shows that, is more in a with shallow (0.05 µm), thin thickness (0.4 µm) concentration (1 ×1016 cm-3), while relatively deep (0.1 concentration. formation layer increases structure, no significant...
The effects of 28 GeV 56Fe and 13.72 28Si ion irradiation on the structural properties two types Bayfol, namely DPF 5023 CR 1–4 polycarbonates, have been investigated. It is worth mentioning that this report almost first one dealing with topic material changes in such a high energy range. Samples from each type Bayfol were classified into groups. group has exposed to Fe fluences at levels between 2000 8000 ion/cm2. second Si ions similar fluences. total deposited 27.44 224 E12 eV....
Proton energy dependence of radiation damage to GaAs/Ge solar cells irradiated by protons with various energies (50 keV, 200 1 MeV and 9.5 MeV) were analyzed using PC1D simulation together SRIM simulations investigate their electrical properties. The degradation the open-circuit voltage is highest for 50 keV irradiation lowest irradiation. According above changes in properties are mainly related different regions cells.
Despite the harshness of space radiation on satellite electronic components, some Commercial Of The Shelf (COTS) can sustain such harsh environment. Thus, low-cost advantage COTS be utilized given that these components meet technical design requirements targeted subsystem. Because complexity microcontrollers and their various integrated functionality, they present a hardness assurance challenge. A careful technique was followed in analyzing effects. Then rigorous tests should conducted to...
Egypt, the region’s agricultural powerhouse, has largest irrigation area among eleven Nile Basin countries. Meanwhile, demand for water and management is becoming necessary. The Internet of Things (IoT) plays a key role in smart agriculture to cope with modern scarcity. This paper presents methodology design assessment small IoT satellite constellation providing continuous coverage over Egypt decides on optimal location ground stations serve sector Egypt. Moreover, it evaluates latency...
This research focuses on metal additive manufacturing (MAM) and examines the impact of alloying materials anodized produced layer, placing particular emphasis its use in construction NARSSCube satellite's frame. To enhance AA6061-T6 Al alloy's mechanical physical qualities, Mg, Mn, Si, Cr concentrations were changed. As a result, seven different alloys cast, their characteristics assessed. It is essential to anodize aluminum alloy H2SO4 solution order produce an oxide film (AOF) that...
Abstract This paper presents a standalone predictive model for Atomic Oxygen (AO), Coronal Mass Ejections (CMEs) and other space-environment parameters. The prediction is based on the numerical method of Holt–Winter’s triple smooth exponential forecasting atmospheric constituents. Solar cycle 25 likely to show about same activity as 23. corresponding AO-flux–solar-activity correlation coefficients altitudes 100, 200, 300 km are: 0.62, 0.53, 0.48, respectively, while higher are lower than an...