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Topic: Range (particle radiation)

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P#3 ESA Utilization Workshop The charged particles causing the events are probably softer than the CPD range starting at 50 keV. The region void of radiation in the middle of the diagrams is the polar cap delimited by the auroral zones. The SIM observations of radiation induced anomalies are illustrated in world maps like the example shown in the figure to the right for the interval from 1 to 10 September 1999. www.dmi.dk /fsweb/Esautilw/Radeff.html   (2147 words)

Ionizing radiation - Wikipedia, the free encyclopedia Ionizing radiation is a type of particle radiation in which an individual particle (for example, a photon, electron, or helium nucleus) carries enough energy to ionize an atom or molecule (that is, to completely remove an electron from its orbit). While most solar radiation is electro-magnetic radiation, the sun also produces particle radiation, solar cosmic rays, which vary with the solar cycle. Although people cannot sense ionizing radiation, there is a range of simple, sensitive instruments capable of detecting minute amounts of radiation from natural and man-made sources. en.wikipedia.org /wiki/Ionizing_radiation   (3455 words)

Coherent Effects for Charged Particles As mentioned in the introduction, Cherenkov detectors are used primarily for identifying the type of a particle (whose momentum or energy is, at least approximately, known), rather than for tracking the position of the particle. This is typically arranged by being sensitive to a certain range of Cherenkov angles, for example by having mirrors and/or baffles between the radiator and the light detector. In this way, the centre of the ring indicates the position of the particle and the radius of the ring measures the Cherenkov angle and so the velocity of the particle. www.shef.ac.uk /physics/teaching/phy311/coherent.html   (853 words)

bg.html If the primary radiation is not charged (neutron, gamma), detection depends on interaction first to produce a moving charged particle, which will then generate the signal – no primary interaction, no signal. Betas always involve a range of energies, up to some maximum, and absorption of betas assumes a range of energies. Surface Barrier detectors used mainly for the detection of alpha and beta radiation. www.physics.rutgers.edu /ugrad/labs/bg.html   (2684 words)

Synchrotron - Wikipedia, the free encyclopedia Synchrotron radiation is useful for a wide range of applications and many synchrotrons have been built especially to produce synchrotron light. For applications of the synchrotron radiation produced by cyclic particle accelerators see synchrotron light. A synchrotron is a particular type of cyclic particle accelerator in which the magnetic field (to turn the particles so they circulate) and the electric field (to accelerate the particles) are carefully synchronized with the travelling particle beam. en.wikipedia.org /wiki/Synchrotron   (1171 words)

PAL Instrument For a given radiator, the range of measurable velocities for the ring imaging count is much wider since the upper velocity limit is determined by the position resolution of the detector and not by the point at which the Cherenkov light saturates. This detector allows for the separation of the lighter (and hence higher velocity) electrons, positrons, muons and pions from the heavier (slower moving) antiprotons and protons in the 4-20 GeV range. The GRICH detector represents the next major step in particle detectors for balloon-borne experiments. www.ece.nmsu.edu /pal/instrument.html   (1171 words)

capturewa.txt Particles then feel the immediate effect of radiation pressure and move on radiation-modified orbits that have new semimajor axis and eccentricity. An alternative technique that holds promise for epsilon prime ~ 0.4 for a film coating on a PVDF sensor with coating thickness in the range 1 to 2 micrometers was investigated and developed by the Aerospace Corp. [21]. For sensors used in a system requiring particle penetration of a coated sensor with minimum particle degradation (ablation, velocity loss, fragmentation), the Z-306 coating method is not suitable at present since it would introduce considerable particle degradation [4-7]. www.lpi.usra.edu /meetings/programs/capturewa.txt   (8132 words)

1st ASTROSAT Workshop - Pulsar Astrophysics In this case, the radiation is compressed into a small range of angles around the instantaneous velocity vector of the particle. Cyclotron and synchrotron radiation are strongly polarized; detection of polarization is regarded as strong observational evidence for synchrotron or cyclotron radiation. Synchrotron radiation is associated with the acceleration suffered by electrons as they spiral around magnetic field lines. www.tifr.res.in /~bpaul/asw/html/xrays.html   (907 words)

PAMELA@Siegen - Transition Radiation Detector Practically, this radiation only becomes useful for detectors in the case of ultrarelativistic particles (γ ≥ 1000), when the emission is mainly along the particle direction, and in the energy range of X-rays. Thus, a Transition Radiation Detector (TRD) can be employed as a mean of identifying particles measuring their γ, or as a threshold detector, to distinguish between particles which emit or not transition radiation. When a charged particle crosses the boundary between two media with different dielectric properties (that is to mean, with different index of refraction), it can emit an electromagnetic radiation, known as transition radiation, which was first observed by pamela.physik.uni-siegen.de /pamela/trd.html   (907 words)

Remote Sensing Tutorial Introduction - Part 2 Page 2 Radiation from specific parts of the EM spectrum contain photons of different wavelengths whose energy levels fall within a discrete range of values. Note that the radiation is moving in some direction or pathway relative to a reference line as defined by the angle θ. It is also described as the messenger particle for EM force or as the smallest bundle of light. rst.gsfc.nasa.gov /Intro/Part2_2.html   (2230 words)

19 May 2004 - DESY: 40 Years of Research with Synchrotron Radiation at DESY Moreover, starting in 2005 scientists will be able to carry out experiments at the free-electron laser VUV-FEL, which will generate radiation in the VUV and the soft X-ray range. Forty years ago, synchrotron radiation at DESY started from scratch: At the beginning of the 1960s, the intense light generated when accelerated electrons fly around a curved path was regarded by the DESY physicists as an unwanted, disruptive effect. A further milestone was marked in 1980 by the establishment of the Hamburg Synchrotron Radiation Laboratory HASYLAB, which maintains a large experimental hall with nearly 40 measuring stations at the DORIS accelerator. www.interactions.org /cms/?pid=1012146   (727 words)

references - light scattering Light scattering characteristics of spheroidal particles are studied for a wide range of particle parameters and orientations. The radiation pressure exerted on a circular cylinder is analyzed as a function of the diameter of the cylinder under the condition rho >>1, where rho =2 pi alpha / lambda, alpha is the radius of the cylinder, and lambda is the wavelength. Equations are given for calculating the mean cosine of radiation scattering by a circular cylinder in different cases of orientation of its axis in space relative to the direction of propagation of the incident radiation. atol.ucsd.edu /~pflatau/scatlib/scatlib/scatrefs/ref-cylinder.html   (6170 words)

Beta Radiation Beta particles ionize less easily than do the heavy particles and therefore they have a much longer range. Beta radiation is emitted during the radioactive decay of many beta-active, unstable nuclides. The beta particle, which is an electron, is emitted when a neutron in a nucleus is transformed into a proton. www.kose.ee /nucbasic/nucpedia/uk/beta_radiat.htm   (138 words)

Particle physics - Wikipedia, the free encyclopedia Particle physics is a branch of physics that studies the elementary constituents of matter and radiation, and the interactions between them. These include atomic constituents such as electrons, protons, and neutrons (protons and neutrons are actually composite particles, made up of quarks), particles produced by radiative and scattering processes, such as photons, neutrinos, and muons, as well as a wide range of exotic particles. Other important goals in particle physics are the determination of the neutrino masses and the clarification of the existence of double beta decay of the proton. en.wikipedia.org /wiki/Particle_physics   (138 words)

radiation on Encyclopedia.com Radiation is usually considered to travel from a source in straight lines, but its path may be affected by external factors; for instance, charged particles travel in curved paths in magnetic fields. Examples of particle radiation are alpha and beta rays in radioactivity, and many kinds of atomic and subatomic particles such as electrons, mesons, neutrons, protons, and heavier nuclei (see cosmic rays). Acoustic radiation, propagated as sound waves, may be sonic (in the frequency range from 16 to 20,000 cycles per sec), infrasonic, or subsonic (frequency less than 16 cycles per sec), and ultrasonic (frequency greater than 20,000 cycles per sec). www.encyclopedia.com /html/r1/radiatn.asp   (846 words)

Medcyclopaedia - Ionizing radiation In imaging, the ionizing radiations are X-rays and gamma rays as well as particle rays resulting from radioactive decay. radiation which is able to produce ions via the photoelectric effect, Compton scattering or pair production or the interaction of particles. As the atomic ionization energy is of the order of a few electron volts (eV), rays having an energy of over a few tens of electron volts are ionizing (ionization energy of hydrogen H : 13.6 eV), while visible light has energies in the range of 1 eV and thus is not ionizing. www.medcyclopaedia.com /library/topics/volume_i/i/IONIZING_RADIATION.aspx   (149 words)

Radiation Effects Facility - The Cyclotron Institute - Texas A&M University With the modern K500 superconducting cyclotron and the advanced ECR ion source, a diverse range of particle beams and energies are available for radiation effects testing. Welcome to the Radiation Effects Facility at The Cyclotron Institute located on the campus of Texas AandM University in College Station, Texas. Radiation Effects Facility / Cyclotron Institute / Texas AandM University / MS #3366 / College Station, TX 77843 cyclotron.tamu.edu /ref   (124 words)

Phys. Rev. ST Accel. Beams 2, 122802 (1999): Le Sage et al. - Transverse phase space mapping... Optical transition radiation (OTR) has proven to be a versatile and effective diagnostic for measuring the profile, divergence, and emittance of relativistic electron beams with a wide range of parameters. Transition radiation techniques are unaffected by space charge considerations; See Helmut Wiedemann, Particle Accelerator Physics: Basic Principles and Linear Beam Dynamics (Springer-Verlag, New York,1993). Transverse phase space mapping of relativistic electron beams using optical transition radiation prst-ab.aps.org /abstract/PRSTAB/v2/i12/e122802   (124 words)

Experimental Elementary-Particle Physics The Experimental Particle Astrophysics group mainly uses natural cosmic radiation as a source of elementary particles to study the character of the fundamental interactions, and the structure and evolution of large-scale astrophysical systems. Current projects include the world's largest neutrino detector, a long base line neutrino experiment with a neutrino source from the KEK proton accelerator (the K2K experiment), a satellite born gamma ray observatory, and the use of balloon-borne detectors to extend direct observations of the primary cosmic ray spectrum to the highest accessible energy range. Most ultra-high energy cosmic ray detectors are ground based and have to infer spectra from observations of particle cascades induced in the atmosphere by cosmic ray interactions at high altitudes. www.phys.washington.edu /expelem.htm   (1478 words)

6th Radioactivity, Radionuclides, and Radiation Training Course : Slovenia Interaction of Radiation with Matter: Range of charged particle and photos in materials, biological effects of ionising radiation, radiation hormesis and LNT model The 6th European Commission sponsored training course on Radioactivity, Radionuclides and Radiation with Nuclides.net was held at the Nuclear Training Centre of the Jozef Stefan Institute in Ljubljana, Slovenia from the 14th to 16th of September, 2005. Recent developments on the Oklo nuclear geyser, laser transmutation (download below), nuclear forensic science and radiation hormesis were just a few of the special topics covered at the sixth Nuclear Science training course with Nuclides.net. www.radiochemistry.org /2005_slovenia/index.html   (282 words)

Civil Defense Radiation Detection Survey Meters, Geiger Counters & Dosimeters FAQ Beta particle radiation is generally a slight external exposure hazard, although prolonged exposure to large amounts can cause skin burns and it is also a major hazard when interacting with the lens of the eye. Radiation threats are unique in that you can't see, smell, taste, hear or feel them, until it's already done its damage and you are suffering the effects. Also, where authorities are warning of radiation fallout not yet arrived, but anticipated to be heading your way, with a radiation meter you'll be able to confirm that the suggested protective action is in fact reducing your exposure and not inadvertently increasing it. www.radmeters4u.com   (11676 words)

Physics In the next several years, particle accelerators will begin probing energy scales in the TeV range, in which experimentalists are hoping to find evidence for the higgs boson and supersymmetric particles. Atom -- Electron -- Gluon -- Graviton -- Neutrino -- Neutron -- Quark -- Photino -- Photon -- Proton -- W and Z bosons -- Particle radiation -- Phonon -- Roton In particle physics, the first pieces of experimental evidence for physics beyond the Standard Model have begun to appear. www.sciencedaily.com /encyclopedia/physics   (11676 words)

Experimental Elementary-Particle Physics The Experimental Particle Astrophysics group mainly uses natural cosmic radiation as a source of elementary particles to study the character of the fundamental interactions, and the structure and evolution of large-scale astrophysical systems. Current projects include the world's largest neutrino detector, a long base line neutrino experiment with a neutrino source from the KEK proton accelerator (the K2K experiment), a satellite born gamma ray observatory, and the use of balloon-borne detectors to extend direct observations of the primary cosmic ray spectrum to the highest accessible energy range. Most of what is currently known about elementary particles is described by the "Standard Model" of particle physics. www.phys.washington.edu /expelem.htm   (11676 words)

Position Sensitive Detectors in Particle Physics Particle Physics 'experiments' are capital facilities that are like astronomical observatories, in that a range of studies may be undertaken over a period of years using the same kit of parts. Particle Physics continues to set exacting demands on detector technology and readout: in speed, position resolution, double hit resolution, material thickness, radiation hardness, data flow, data compression and event triggering. A detector which is sensitive to minimum-ionising particles is vulnerable to streamer discharges caused by heavily ionising particles such as nuclear fragments which are always present at a low rate in reactions involving hadrons. ppewww.ph.gla.ac.uk /preprints/1999/17/SaxonPSD5web.html8   (11676 words)

radiation on Encyclopedia.com Radiation is usually considered to travel from a source in straight lines, but its path may be affected by external factors; for instance, charged particles travel in curved paths in magnetic fields. Examples of particle radiation are alpha and beta rays in radioactivity, and many kinds of atomic and subatomic particles such as electrons, mesons, neutrons, protons, and heavier nuclei (see cosmic rays). Acoustic radiation, propagated as sound waves, may be sonic (in the frequency range from 16 to 20,000 cycles per sec), infrasonic, or subsonic (frequency less than 16 cycles per sec), and ultrasonic (frequency greater than 20,000 cycles per sec). www.encyclopedia.com /html/r1/radiatn.asp   (11676 words)

Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations 440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation ;430303 -- Particle Accelerators-- Experimental Facilities & Equipment; ;FERMILAB ACCELERATOR-- TRANSITION RADIATION DETECTORS;TRANSITION RADIATION DETECTORS-- PERFORMANCE TESTING; EXPERIMENTAL DATA;GEV RANGE 100-1000 Energy Citations Database (ECD) Document #6306772 - Beamline transition radiation detector for MW Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link. For a journal article, please see the Resource Relation field. www.osti.gov /energycitations/product.biblio.jsp?osti_id=6306772   (11676 words)

Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations 440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation ;430303 -- Particle Accelerators-- Experimental Facilities & Equipment ;662340 -- Hadron Interactions-- (1992-); EXOTIC RESONANCES-- FERMILAB COLLIDER DETECTOR;EXOTIC RESONANCES-- PARTICLE IDENTIFICATION;PROTON-ANTIPROTON INTERACTIONS-- EXOTIC RESONANCES; CHARGED PARTICLES;CROSS SECTIONS;FERMILAB TEVATRON;GLUONS;MASS SPECTRA;PAIR PRODUCTION;PARTICLE PRODUCTION;QUARKS;REST MASS;STANDARD MODEL;SUPERSYMMETRY;TEV RANGE 01-10 Energy Citations Database (ECD) Document #5037723 - Search for exotic particles at CDF Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link. www.osti.gov /energycitations/product.biblio.jsp?osti_id=5037723   (11676 words)

NASA - Radiation "Safe Zone" Migrates During Solar Cycle As the spacecraft flew in their polar orbits, they detected fewer radiation belt particles at a certain latitude range, indicating safe zone passages by the spacecraft. The wave-particle interaction regions (red), characterized by a specific combination of plasma density and magnetic field strength, change locations over the solar cycle, causing the apparent migration of the radiation belt slot. If the radiation belts were visible, they would resemble a pair of donuts around the Earth, one inside the other with the Earth in the "hole" of the innermost donut. www.nasa.gov /centers/goddard/news/topstory/2006/safe_zone_shift.html   (1209 words)

Course Notes for EE480 Acoustics and Audio Spherical waves: specific acoustic impedance, relationship between pressure and particle velocity. Audio connections, standard signal levels (consumer and pro), and dynamic range. Finish comments regarding sound pressure level; start sound radiation discussion from Chapter 7. www.coe.montana.edu /ee/rmaher/EE480/notes.htm   (568 words)

eecs512_final.doc As amorphous silicon radiation sensors are most efficient in the visible light range, the down converting of the high-energy particles to within that range is extremely important for efficient operation. Interacting with the metal layer, the radiation particle will emit secondary particles which may or may not be the same type of the primary one. While the absorption of radiation particles mainly occurs in metal layers, the secondary particles originating from the metal layers are responsible for electron-hole pair generation in the pin diode intrinsic layer (Fig. www.eecs.umich.edu /~jpotkay/docs/eecs512_final.doc   (7642 words)

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