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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 several months of room temperature annealing.
The long-base P-I-N diodes studied here can effectively measure displacement damage induced by most Galactic Cosmic Ray (GCR) components in free space. Further experiments, particularly with higher damaging particles like 56Fe, are needed to confirm their behaviour against the heaviest ion complement in GCR. Additionally, experiments conducted under cryogenic and extremely low-temperature conditions are necessary to ensure the diodes operate reliably in the thermal environment of space.

Linear-energy-transfer , Kinetic-energy , Kinetic-energy-released , Galactic-cosmic-ray , Space , Adiation , Etecotrs , Osimetry , Isplacement-damage ,

Russia's invasion of Ukraine has left the entire region at a heightened risk of radioactive pollution

The Russian invasion of Ukraine has placed Ukraine’s nuclear sites under considerable threat with a growing risk that further conflict may lead to radioactive contamination.

Kharkiv , Kharkivs-ka-oblast- , Ukraine , Zaporizhzhya , Zaporiz-ka-oblast- , Rivne , Rivnens-ka-oblast- , Kakhovka , Amurskaya-oblast- , Russia , Russian , Soviet

Paul Parker swore to fix some of California's deadliest jails. He gave up. | State and Regional

“Am I going to continue banging my head against the wall here for something I don’t think is going to change?” asked the leader of a civilian law enforcement review

San-diego , California , United-states , San-diego-county , Riverside-county , Luis-nolasco , Aaron-littman , Eileen-delaney , Sabrina-weddle , Saxon-rodriguez , Bill-gore , Paul-parker

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.

Kuusela , Lapland , Finland , Finnish , Kaisa-lakkala , Laura-mikkola , Nuclear-safety-authority , Master-of-health-sciences , Research-scientist , University-of-eastern-finland , Health-promotion , Finnish-meteorological-institute

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.

Sendai , Miyagi , Japan , Tohoku , Japan-general- , Tohoku-university , Ohoku-university , Adiation , Anoterasu ,

Scientists spot 'glory effect' on a world beyond our solar system for the first time | National

Astronomers have spotted what they believe to be a rainbow-like phenomenon occurring on a planet outside our solar system for the first time, and it could reveal new insights about

Portugal , Olivier-demangeon , Theresa-lueftinger , Institute-of-astrophysics , Warner-bros , Space-sciences , Cable-news-network-inc , European-space-agency-cheops , Discovery-company , Exoplanet-survey-satellite , European-space-agency-ariel , European-space-agency

26 years after The Eagle documented Melissa Adams-Matarazzo's fight against cancer, the Pittsfield woman faces brain surgery

Melissa Adams-Matarazzo and her family kept the clippings from The Berkshire Eagle that tell the story of how she beat cancer as a teenager in the 1990s. But there was

Boston , Massachusetts , United-states , Pittsfield , Berkshire , Melissa-adams-matarazzo , Alexandra-golby , Bryan-matarazzo , Colleen-adams , Harvard-medical-school , Herberg-middle-school , Berkshire-eagle

With inspiration from "Tetris," MIT researchers develop a better radiation detector | MIT News

A new detector system based on the game “Tetris” could enable inexpensive, accurate radiation detectors for monitoring nuclear sites.

Ukraine , Idaho , United-states , Japan , Ukrainian , Ryotaro-okabe , Jiankai-yu , Ryan-pavlovsky , Tongtong-liu , Mingda-li , Shangjie-xue , Stephanie-jegelka

Health Beat: Postage stamp-sized treatment for brain tumors

More than 200,000 people in the U.S. are diagnosed with an aggressive brain tumor each year.

Anthony-parise , Matthew-shepard , Allegheny-health-network , Anthony , Gamma-tile , Brain-tumor , Adiation , Umors , Nthony-parise , Atthew-shepard , Ri ,

Toxic site clean-ups are a lesson about polluting industries

The fact that these efforts are decades-long projects should act as a admonitory lesson concerning contemporary industries that can damage human health and the natural environment.

Russia , Tonawanda , New-york , United-states , Niagara-falls , Love-canal , Niagara-county , Russian , America , Lockport-simonds , Steel-co , Lockport-industrial-development-agency