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Cherenkov Radiation

All articles tagged with #cherenkov radiation

space21 days ago•10 min saved

Cosmic Rays Flash Lights for ISS Crews

Astronauts aboard the International Space Station report seeing flashes of light with eyes closed caused by high-energy cosmic rays passing through their bodies, either directly ionizing the retina or via Cherenkov radiation. Historical experiments (SilEye/ALTEA) linked particle tracks to the flashes, confirming the phenomenon and highlighting space radiation as a detectable, personal readout of exposure and a major shielding challenge for long-duration missions.

via Space Daily|

#cherenkov-radiation #cosmic-rays #iss

science6 months ago•5 min saved

Ghostly Vacuum Signals Could Redefine Gravity

A theoretical study suggests Cherenkov radiation in empty space could arise from a negative-energy ghost instability, uniting two seemingly different phenomena and offering a potential window into modified gravity; if true, the vacuum would have structure and stored energy, but the idea remains purely theoretical with no practical detection method yet.

via ScienceAlert|

#cherenkov-radiation #cosmology #gravity

science1 year ago•4 min saved

Record-Breaking Cosmic-Ray Electrons Detected Near Earth

The H.E.S.S. Observatory in Namibia has detected the most powerful cosmic-ray electrons and positrons ever observed, with energies up to 40 teraelectronvolts. These particles, known as cosmic ray electrons (CRe), likely originate from a few sources within a few thousand light-years of our Solar System. The detection of these high-energy particles, which create Cherenkov radiation when they hit Earth's atmosphere, provides new insights into their origins, possibly linked to supernova remnants or pulsars. The findings, published in Physical Review Letters, advance our understanding of cosmic rays and their sources.

via ScienceAlert|

#astrophysics #cherenkov-radiation #cosmic-rays

science1 year ago•3 min saved

Record-Breaking Cosmic Rays Detected Near Earth

Scientists have detected the most powerful cosmic rays ever, with energies up to 40 teraelectronvolts, using the HESS observatory in Namibia. These rays, consisting of electrons and positrons, likely originate from sources within a few thousand light-years of Earth, as they lose energy while traveling through space. The exact sources remain unknown, but the findings, published in Physical Review Letters, provide crucial data on cosmic rays in an unexplored energy range, impacting our understanding of the local cosmic neighborhood.

via Livescience.com|

#astrophysics #cherenkov-radiation #cosmic-rays

science-and-technology3 years ago•5 min saved

2D Interaction Unveils Surprising Quantum Radiation Properties

Researchers from Technion have presented the first-ever experimental observation of Cherenkov radiation confined within a two-dimensional space, revealing the quantum properties of the radiation. The low dimensionality of the effect permitted a glimpse into the quantum nature of the process of radiation emission from free electrons, and the entanglement of the electrons with the light waves they emit. The study links this phenomenon to potential future applications in photonic quantum computing and free-electron quantum light sources.

via SciTechDaily|

#cherenkov-radiation #free-electron-quantum-light-sources #photonic-quantum-computing