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Pierre Auger Observatory. The Pierre Auger Observatory is an international cosmic ray observatory in Argentina designed to detect ultra-high-energy cosmic rays: sub-atomic particles traveling nearly at the speed of light and each with energies beyond 1018 eV. In Earth's atmosphere such particles interact with air nuclei and produce various ...
The IceCube Neutrino Observatory (or simply IceCube) is a neutrino observatory developed by the University of Wisconsin–Madison and constructed at the Amundsen–Scott South Pole Station in Antarctica. [1] The project is a recognized CERN experiment (RE10). [2][3] Its thousands of sensors are located under the Antarctic ice, distributed over ...
Coincidence method. In particle physics, the coincidence method (or coincidence technique) is an experimental design through which particle detectors register two or more simultaneous measurements of a particular event through different interaction channels. Detection can be made by sensing the primary particle and/or through the detection of ...
planned. Cosmic Vision. ← ATHENA. The Laser Interferometer Space Antenna (LISA) is a planned space probe to detect and accurately measure gravitational waves [2] —tiny ripples in the fabric of spacetime —from astronomical sources. [3] LISA will be the first dedicated space-based gravitational-wave observatory.
A complete Geiger counter, with the Geiger–Müller tube mounted in a cylindrical enclosure connected by a cable to the instrument. The Geiger–Müller tube or G–M tube is the sensing element of the Geiger counter instrument used for the detection of ionizing radiation. It is named after Hans Geiger, who invented the principle in 1908, [1 ...
Albert Einstein proposed [3][4] three tests of general relativity, subsequently called the "classical tests" of general relativity, in 1916: the perihelion precession of Mercury 's orbit. the deflection of light by the Sun. the gravitational redshift of light. In the letter to The Times (of London) on November 28, 1919, he described the theory ...
The counter was 10.2 cm (4.0 in) long by 2.0 cm (0.79 in) diameter and the internal wire was 10 cm (3.9 in) in length. The tube had a very small variation in counting efficiency over the range -55° to +175 °C. It had approximately 85% counting efficiency for cosmic rays, and about 0.3% counting efficiency for photons of energy 660 keV. The ...
The final test for Marine recruits at Parris Island is a grueling 54-hour training exercise called “The Crucible.”. In 2021, two recruits collapsed during the challenge and received medical ...