Hybrid spacecraft processing platforms that combine radiation-hardened components with commercialgrade COTS components have the potential to dramatically improve performance while reducing overall project cost and risk. However, the susceptibility of COTS components to single-event upsets and other radiation effects can diminish their benefits without adequate mitigation techniques. As a major ...

We examine cosmic ray rejection methodology on data collected from InSb and Si:As detectors. The application of an Up-the-Ramp sampling technique with onthe-fly cosmic ray identification and mitigation is the focus of this study. This technique is valuable for space-based observatories which are exposed to high-radiation environments. We validate the Up-the-Ramp approach on radiation-test data ...

The topic of this thesis is about soft-errors in digital systems. Different aspects of soft-errors have been addressed here, including an accurate simulation model to emulate soft-errors in a gate-level net list, a simulation framework to study the impact of soft-errors in a VHDL design and an efficient architecture to minimize the impact of soft-errors in a DSP processor. The first two chapter...

Significant progress has been made in macromolecular crystallography over recent years in both the understanding and mitigation of X-ray induced radiation damage when collecting diffraction data from crystalline proteins. In contrast, despite the large field that is productively engaged in the study of radiation chemistry of nucleic acids, particularly of DNA, there are currently very few X-ray...

Abstract A series of experiments have been executed at JET to assess the efficacy newly installed shattered pellet injection (SPI) system in mitigating effects disruptions. Issues, important for ITER disruption mitigation system, such as thermal load mitigation, avoidance runaway electron (RE) formation, radiation asymmetries during quench electromagnetic control and RE energy dissipation addre...

The additional dose contribution to the radiation exposure at aviation altitudes during Solar Particle Events (SPEs) has been a matter of concern for many years. After the Halloween storms in 2003 several airlines began to implement mitigation measures such as rerouting and lowering flight altitudes in response to alerts on the NOAA S-scale regarding solar radiation storms. These alerts are bas...

Radiation exposure to astronauts could be a significant obstacle for long duration manned space exploration because of current uncertainties regarding the extent of biological effects. Furthermore, concepts for protective shielding also pose a technically challenging issue due to the nature of cosmic radiation and current mass and power constraints with modern exploration technology. The concer...

Studying cellular response to radiation damage is important from the perspectives of both radiotherapy and the mitigation of radiation damage. In the case of the former, the goal is the induction of cell death, whereas in the latter case a cellular response leading to organismal survival is required. The fate of the organism after radiation damage is linked in a complex manner to cellular fate....

Orbital remote sensing instruments and systems benefit from high performance, adaptable computing systems. Field programmable SRAM-based gate arrays (FPGAs) are usually the chosen platform for real-time reconfigurable computing. This technology is driven by the commercial sector, so devices intended for the space environment must be adapted from commercial product. Total ionizing dose, heavy io...

background: indoor radon gas (222rn) has been recognized as one of the health hazards for human. air radon comes mainly from basement soil and construction materials. saghand region with rich uranium mines lies 180 km from yazd, so the indoor radon concentration can be high. yazd, with population of about 457000, is the biggest city near saghand, thus, indoor gamma background radiation of yazd ...