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The two counters consist of an electron counter and a photon counter that are placed in opposite sides from the beam. Due to the minimal energy of the recoil electron, the electron detection essentially occurs at their scattering site. Thus the scattering volume must be situated within the electron counter. [2]
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 ...
The counters are surrounded by lead or steel shielding, to eliminate background radiation and to reduce the incidence of cosmic rays. In addition, anticoincidence detectors are used; these record events outside the counter and any event recorded simultaneously both inside and outside the counter is regarded as an extraneous event and ignored.
e. Wheeler's delayed-choice experiment describes a family of thought experiments in quantum physics proposed by John Archibald Wheeler, with the most prominent among them appearing in 1978 and 1984. [ 1 ] These experiments are attempts to decide whether light somehow "senses" the experimental apparatus in the double-slit experiment it travels ...
LOPES (telescope) Coordinates: 49°05′57.8″N 8°26′14.7″E. The LOPES project (LOFAR PrototypE Station) was a cosmic ray detector array, located in Karlsruhe, Germany, and is operated in coincidence with an existing, well calibrated air shower experiment called KASCADE. In 2013, after approximately 10 years of measurements, LOPES was ...
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 ...
The Alpha Magnetic Spectrometer (AMS-02) is a particle physics experiment module that is mounted on the International Space Station (ISS). [4] The experiment is a recognized CERN experiment (RE1). [5][6] The module is a detector that measures antimatter in cosmic rays; this information is needed to understand the formation of the universe and ...
Citizen scientists spotted an object zipping through the Milky Way at more than 1 million miles an hour, and a new study shows it could be a rare hypervelocity star.