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"Detector for Displacement Damage Dose Monitoring in a Space Radiation " by Daniel John Bennett

This study investigates the use of a specially developed P-I-N diode to measure displacement damage in a silicon substrate caused by irradiation from 400 MeV/u 20Ne, 500 MeV/u 40Ar, 290 MeV/u 12C, and 6, 9, 12, 20 MeV electrons. Various energy levels of heavy ions attenuated by PMMA beam degraders were assessed. The study focuses on the forward voltage shift of the P-I-N diode as an indicator of displacement damage in silicon. Comparisons were made with simulated fluences, and the associated particle displacement Kinetic Energy Released per unit Mass (KERMA) to the silicon substrate.
The investigation revealed that the long base P-I-N diode's response is directly proportional to displacement damage, exhibiting a long dynamic range and independence from particle type, energy, and Linear Energy Transfer (LET). Applying a calibration factor demonstrated good agreement between simulation and experimental values. Diode fading was also assessed, showing a 20% voltage fade after sever ....

Linear Energy Transfer , Kinetic Energy , Kinetic Energy Released , Galactic Cosmic Ray , Displacement Damage ,

Rising melanoma cases in Finland prompt calls for enhanced sun protection

Melanoma incidence in Finland is on the rise, particularly among the younger population who often underestimate the long-term health risks posed by sun exposure. Despite increasing awareness about the dangers of ultraviolet (UV) radiation, many young Finns are failing to adopt adequate sun protection measures.

The Finnish Cancer Registry reported a significant uptick in melanoma cases, with 1,028 men and 811 women diagnosed in 2023. ....

Kaisa Lakkala , Laura Mikkola , Nuclear Safety Authority , Master Of Health Sciences , Research Scientist , University Of Eastern Finland , Health Promotion , Finnish Meteorological Institute , Northern Finland , Senior Specialist , Health Sciences , Eastern Finland ,

NanoTerasu accelerator goes into operation in northeastern Japan

The technology is expected to be used in research in a wide range of areas, from food to medicine. ....

Japan General , Tohoku University , Tohoku University ,