Radiation environment of Spacelab-1

1985 ◽  
Author(s):  
E. BENTON ◽  
A. FRANK ◽  
T. PARNELL ◽  
J. WATTS, JR. ◽  
J. GREGORY
Keyword(s):  
Radiation Environment

Pulsed Laser Stimulation Coupled with Optical Failure Analysis Technique—A Methodology to Help Space Application Electrical Designers

2015 ◽  
Author(s):  
G. Bascoul ◽  
K. Sanchez ◽  
G. Perez ◽  
F. Bezerra ◽  
H. Chauvin
Keyword(s):  
Heavy Ions ◽  
Pulsed Laser ◽  
Radiation Sensitivity ◽  
Radiation Environment ◽  
Physical Analysis ◽  
Space Application ◽  
Voltage Converter ◽  
Industrial Laboratory ◽  
Sensitivity Evaluation ◽  
Analysis Technique

Abstract Pulsed laser for radiation sensitivity evaluation has become a common tool used in research and industrial laboratory. This paper aims to highlight an approach to understand weaknesses of a component under radiation environment using a short pulsed width laser beam coupled to thermography technique, heavy ions test inputs and physical analysis. This paper is based on a study of a PWM device embedded on voltage converter.

Temporal Telomere and DNA Damage Responses in the Space Radiation Environment

2020 ◽  
Author(s):  
Jared J. Luxton ◽  
Miles J. McKenna ◽  
Lynn E. Taylor ◽  
Kerry A. George ◽  
Sara Zwart ◽  
...  
Keyword(s):  
Dna Damage ◽  
Space Radiation ◽  
Radiation Environment ◽  
Dna Damage Responses ◽  
Space Radiation Environment

Kinetics studies on free radical scavenging property of ceria in polysulfone–ceria radiation resistant mixed-matrix membrane

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Amita Bedar ◽  
Beena G. Singh ◽  
Pradip K. Tewari ◽  
Ramesh C. Bindal ◽  
Soumitra Kar
Keyword(s):  
Radical Scavenging ◽  
Radiation Environment ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Ceria Nanoparticles ◽  
Ros Scavenging ◽  
Mixed Matrix ◽  
Stable States ◽  
Host Matrix ◽  
Γ Radiation

Abstract Cerium oxide (ceria) contains two stable states of cerium ions (Ce3+ and Ce4+). The presence of these two states and the ability to swap from one state to another (Ce3+ ↔ Ce4+) by scavenging the highly reactive oxygen species (ROS) generated from radiolysis of water, ensure the enhanced stability of polysulfone (Psf) membranes in the γ-radiation environment. In this study, the ROS scavenging ability of ceria was studied. Ceria nanoparticles were found to scavenge ROS like hydroxyl radicals and hydrogen peroxide (H2O2). The H2O2 scavenging is due to the peroxidase-like catalytic activity of ceria nanoparticles. The ROS scavenging is responsible for offering protection to the Psf host matrix and in turn the stability to the Psf-ceria mixed-matrix membranes (MMMs) in γ-radiation environment. Thus, presence of ceria nanoparticles provides an opportunity for utilizing Psf-ceria MMMs in ionizing radiation environment with increased life span, without compromise in the performance.

Observations of neutron radiation environment during Odyssey cruise to Mars

2021 ◽  
Vol 29 ◽  
pp. 53-62
Author(s):  
M.L. Litvak ◽  
I.G. Mitrofanov ◽  
A.B. Sanin ◽  
B. Bakhtin ◽  
D.V. Golovin ◽  
...  
Keyword(s):  
Neutron Radiation ◽  
Radiation Environment

scholarly journals The durability of flexible eddy current array (FECA) sensors in harsh service environments

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yujian Song ◽  
Tao Chen ◽  
Ronghong Cui ◽  
Yuting He ◽  
Xianghong Fan ◽  
...  
Keyword(s):  
Eddy Current ◽  
Fatigue Cracks ◽  
Radiation Environment ◽  
The Finite Element Method ◽  
Integrated Sensor ◽  
High Durability ◽  
Vibration Experiment ◽  
Service Environments ◽  
Salt Fog Corrosion ◽  
Salt Fog

AbstractSensors for structural health monitoring (SHM) need to be permanently integrated on structures and withstand the harsh service environments, which has been a big challenge for the application of SHM in aircrafts. This paper focuses on the durability of flexible eddy current array (FECA) sensors in harsh service environments of aircrafts, including vibration environment and several typical exposed environments. First, a kind of FECA sensor is illustrated and its integration method is proposed. Moreover, in order to study the durability of the sensor in vibration environment, the modal analysis is performed by the finite element method. According to the simulation results, the durability experiment in vibration environment is carried out under the fourth order vibration mode, which makes the sensor suffer the harshest vibration loads. During the vibration experiment, output signals of the sensor keep stable and the sensor is well bonded to the structure, which shows the integrated sensor has high durability in vibration environment. Finally, the durability of integrated sensors is separately tested in three exposed environments, including salt fog corrosion environment, fluid immersion environment, as well as hygrothermal and ultraviolet-radiation environment. After these environmental exposure experiments, all sensors are well bonded to structures and can effectively monitor fatigue cracks, which shows great durability. Therefore, FECA sensors can survive in harsh service environments of aircrafts, which provides important support for the engineering applications of FECA sensors.

Dosimetry Mapping of Mixed-Field Radiation Environment Through Combined Distributed Optical Fiber Sensing and FLUKA Simulation

2019 ◽  
Vol 66 (1) ◽  
pp. 299-305 ◽  
Author(s):  
Diego Di Francesca ◽  
Angelo Infantino ◽  
Gaetano Li Vecchi ◽  
Sylvain Girard ◽  
Antonino Alessi ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Radiation Environment ◽  
Fiber Sensing ◽  
Field Radiation ◽  
Optical Fiber Sensing ◽  
Mixed Field ◽  
Distributed Optical Fiber

scholarly journals Subsurface Radiation Environment of Mars and Its Implication for Shielding Protection of Future Habitats

2020 ◽  
Vol 125 (3) ◽  
Author(s):  
Lennart Röstel ◽  
Jingnan Guo ◽  
Saša Banjac ◽  
Robert F. Wimmer‐Schweingruber ◽  
Bernd Heber
Keyword(s):  
Radiation Environment

Irradiation Induced Changes in Semiconducting Thin Films

2013 ◽  
Vol 341 ◽  
pp. 181-210 ◽  
Author(s):  
S.K. Tripathi
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Heavy Ions ◽  
Semiconductor Device ◽  
High Energy ◽  
Device Fabrication ◽  
Electrical Performance ◽  
Radiation Environment ◽  
Extended Defects ◽  
Semiconducting Thin Films

High-energy electron, proton, neutron, photon and ion irradiation of semiconductor diodes and solar cells has long been a topic of considerable interest in the field of semiconductor device fabrication. The inevitable damage production during the process of irradiation is used to study and engineer the defects in semiconductors. In a strong radiation environment in space, the electrical performance of solar cells is degraded due to direct exposure to energetically charged particles. A considerable amount of work has been reported on the study of radiation damage in various solar cell materials and devices in the recent past. In most cases, high-energy heavy ions damage the material by producing a large amount of extended defects, but high-energy light ions are suitable for producing and modifying the intrinsic point defects. The defects can play a variety of electronically active roles that affect the electrical, structural and optical properties of a semiconductor. This review article aims to present an overview of the advancement of research in the modification of glassy semiconducting thin films using different types of radiations (light, proton and swift heavy ions). The work which has been done in our laboratory related to irradiation induced effects in semiconducting thin films will also be compared with the existing literature.

The ionizing radiation environment on the moon

2007 ◽  
Vol 40 (3) ◽  
pp. 338-341 ◽  
Author(s):  
J.H. Adams ◽  
M. Bhattacharya ◽  
Z.W. Lin ◽  
G. Pendleton ◽  
J.W. Watts
Keyword(s):  
Ionizing Radiation ◽  
Radiation Environment ◽  
The Moon
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