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Detector characteristics A major difficulty of this technique is trying to determine the energy of the incoming photon. Researchers don't have the luxury of calibrating their instruments at an accelerator or other laboratory.
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Metal detectors use electromagnetic induction to detect metal. Uses include de-mining , the detection of weapons such as knives and guns, especially at airport security, geophysics, archaeology and treasure hunting.... and bomb detectorBomb disposal ...
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Detector Arrays During the past few decades, infrared astronomy has become a major field of science due to rapid advances in infrared detector technology. Many of these advances arose from U.
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Detectors CCDBerry, R. Choosing and Using a CCD Camera: A Practical Guide to Getting Maximum Performance from Your CCD Camera. Richmond, VA: Willmann-Bell, 1992.
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DetectorDevice for recording the presence of subatomic particles. A typical modem detector consists of an array of electronic sensors connected to a computer, ...
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detector noise Readings produced by an instrument even when it's not observing anything; produced by the electronic components within the detector itself. deuterium ...
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A detector is placed in the nose cone section of a sounding rocket and launched above the atmosphere. This was first done at White Sands missile range in New Mexico with a V2 rocket in 1949.
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UV detectors are sensitive to most fires, including hydrocarbons, metals, sulfur, hydrogen, hydrazine, and ammonia.
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Two detectors, in Washington (top) and Louisiana, are trying to detect gravitational waves from some of the most violent events in the universe.
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Dust Detectors CASSINI COSMIC DUST ANALYZER Click image for larger view. Dust detectors measure the number, velocity, mass, charge, and flight direction of dust particles striking the instrument.
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Gallium detectors are similar to chlorine detectors but more sensitive to low- energy neutrinos. A neutrino would convert gallium to germanium which could then be chemically detected.
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Meteoroid Detectors Twenty 0.025-millimeter beryllium copper pressurized cell detectors were used to provide direct measurements in the near-lunar environment of the rate of penetration by micro meteoroids.
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The S-CAM detector under development at the ESTEC laboratory. Image: Astrophysics Division, ESA/ESTEC.
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An electronic detector that records visible light from stars and galaxies to make photographs. These detectors are very sensitive to the extremely faint light of distant galaxies.
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Avalanche Photo detector. The solid-state equivalent of a PMT, usually restricted to operation in the red, near- infrared and infrared part of the spectrum. For photon-counting applications, they are operated in the so-called "Geiger Mode".
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Schematics for SID detectors have been published in a few places, and I know of some schools and universities that built them for educational purposes. There's also a thriving community of amateur astronomers and others who observe SIDs for fun.
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CCD (SOHO Glossary - GSFC) Charge Coupled Device--A semiconductor light detector which converts light to electrical impulses. CCD star tracker (NASA Thesaurus) Navigation instrument designed for the NASA space transportation system.
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phase detector A device that continuously compares the phase of two signals and provides an output proportional to their difference in phase.
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Explorations of Neutrino Detectors Here are some links to the homepages of neutrino ``observatories'' that are in operation around the world. All of the sites will be displayed in another window.
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Astronomy has led to other technological advances, such as low-noise radio receivers, detectors ranging from photographic emulsions to electronic cameras, and image-processing techniques now used routinely in medicine, remote sensing etc.
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The directional accuracy of a single detector was (and remains) poor; the best positions for bursts use time-of-flight " triangulation" from multiple detections including interplanetary spacecraft (for the stronger bursts, ...
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Today, modern electronic detectors (like the CCD chips in digital cameras) provide much greater sensitivity than photographic plates.
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After eliminating all possible sources of detector or experimental noise they concluded that they were picking up a genuine microwave signal from the sky.
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They react with chlorine in the detector to produce a radioactive isotope of argon, which is detectable. Because of its proximity, the sun is expected to be by far the most intense source of neutrinos and has been the initial object of study.
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Obviously, replacing an eye with a different detector solves the above problems. Photographic film can be placed at the focal plane of the telescope to record the image.
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To Alice in the cube, the pulse has to move an equal distance to hit the front and back, and so the pulse hits both detectors simultaneously.
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Explorer 1 carried only one instrument, a small detector of energetic particles, a Geiger counter designed to observe cosmic rays (ions of very high energy and unknown origin, arriving at Earth from distant space--see later section).
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Your skin acts as an infrared detector. If you turn the heat up eventually coil begins to glow dull red (take your hand away!). Now in addition to the infrared radiation some noticeable amount of red light is being emitted.
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In this equation, the first E is the value for energy that we got from the solid state detector. That's simple enough. But q/E is a little different. It is the reciprocal of the energy-per-charge ratio that we found with the electrostatic analyzer.
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Onboard detectors will measure radiation to determine the minerals that make up Mars. The detectors will also measure the composition, pressure, water content, dust content, and changes in the Martian atmosphere.
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When accurate thermal observations became possible through the use of infrared detectors, reasonable conclusions about the outer surface characteristics could finally be made.
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It took them years to analyze the data because rather than relying on automatic detectors to spot new particles, ...
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"The difference in their contributions is mainly the capability of their equipment - if the amateurs had the big telescopes and sensitive detectors, they would be cranking out the same type of results (on a learning curve of course).
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The GRS instrument had three detector systems that together measured the spectra of flare X-rays and gamma rays with energies from 14keV to 140 MeV.
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Detector artifacts create the diagonal streaks on bright star images in this mosaic, which is made from 57 1°-square CCD frames stepped across the galaxy's disk.
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The SDSS survey collects data with modern, digital detectors. An enormous array of CCD detectors takes images, and a pair of spectrographs, fed by optical fibers, collects spectra. The CCD Camera ...
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Energy-loss stack The arrangement in an instrument of a stack of detectors, each of which measures the energy loss of particles as they slow and stop in the stack. Energy-loss stacks are used in both the SIS and CRIS instruments on the ACE spacecraft.
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A sensitive radiation detector. Celestial sphereAn imaginary sphere surrounding the Earth. It is used to help astronomers explain where objects a found in the sky.
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The human eye is a logarithmic detector, and in 1854 Pogson formalized this scale and defined a difference of 5 magnitudes to be exactly a factor of 100 in brightness.
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Note that this list is continually changing as astronomers discover nearby stars with ever more sensitive detectors in a variety of spectral ranges, especially the infrared, where numerous small stars emit their energy.
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Starting in the 1990s, the use of detectors with improved resolution and sensitivity for spectral reflectance measurements resulted in revised taxonomies.
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Definition: pixel: Contraction of "picture element"; the area on the ground represented by each digital number in a digitized image; an individual element in a detector. Space Tragedies9 Planets in Nine Days Astronomy 101 Related Articles ...
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Optical fibers on the beam combiner table guide the combined star light to the electronics room. From there the light travels to photodiode detectors and associated electronics. Electronics Lab ...
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En comparación con la Tierra, la superficie de la Luna es inactiva, sin embargo, cuando ocurren movimientos sísmicos, usualmente estos provienen de la corteza y núcleo de la Luna. La medición de eventos de desgasamiento, a través de detectores ...
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For 20 years the RGO provided expert technical support for the telescopes, including optics, mechanical engineering, electronics, computing, development of new detectors and the twice-yearly round of allocating and scheduling observing time to ...
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 See also: Light, Earth, Energy, Time, Field
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