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Laser's Particle Analog Demonstrated

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UPTON, N.Y., Sept. 13, 2006 -- Particle acceleration by stimulated emission of radiation (PASER), a sort of particle analog of the laser process, has been demonstrated for the first time by a team of physicists, according to the American Institute of Physics (AIP). In a regular laser, photons traveling through an active medium (a body of excited atoms) will stimulate the atoms, through collisions, to surrender their energy in the form of additional emitted photons; this coherent process builds on itself until a large pulse of intense light exits the cavity in which the amplification takes place. Top image: Four...Read full article

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    Published: September 2006
    Glossary
    radiation
    The emission and/or propagation of energy through space or through a medium in the form of either waves or corpuscular emission.
    stimulated emission
    Radiation similar in origin to spontaneous emission but determined by the presence of other radiation having the same frequency. Because the phase and amplitude of the stimulated wave depend on the stimulating wave, this radiation is coherent with the stimulating wave. The rate of stimulated emission is proportional to the intensity of the stimulating radiation.
    AIPBrookhaven National LabelectronsnanoscienceNews & FeaturesparticlePASERPhysics News Updateradiationstimulated emissionTechnion-Israel Institute of Technologyx-rayLasers

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