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        A study of the amplification of laser and VLF waves using a simple pendulum model

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        Iconstudyofamplifica00stur.pdf (5.313Mb)
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        Author
        Sturgess, Keith Alan
        Date
        1993-06
        Advisor
        Colson, William B.
        Second Reader
        Naval Postgraduate School
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        Abstract
        The Lorentz force equation governing the interaction between radiation and charged particles in the presence of a static magnetic field can be reduced to the form of the simple pendulum equation, when applied to the Free Electron Laser (FEL) and to the amplification of whistler waves in the magnetosphere. The first topic in this thesis is the start-up of an FEL with a compact design having a small, spatial undulator period, many periods, and a small undulator field strength. Under these conditions, the number of photons spontaneously emitted into the resonator mode each pass is so small that a classical field cannot be established. Quantum fluctuations affect the wave- particle interaction and therefore diminish weak field gain. An FEL start-up condition, several orders of magnitude more restrictive than determined by quantum recoil alone, is derived from the photon rate equation. The next topic is the evolution of a weak, classical radiation field driven by a long electron pulse
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        Approved for public release, distribution is unlimited
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        http://hdl.handle.net/10945/26794
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        • 1. Thesis and Dissertation Collection, all items

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          Studies of periodically quenched regenerative systems. 

          Harris, Jack Redver (Monterey, California: U.S. Naval Postgraduate School, 1965);
          The general method of amplification by periodically quenching an unstable system under the influence of an input signal is investigated by the use of mathematical calculation, digital computation and experimental verification. ...
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          Acoustic Interaction with the Positive Column of a Neon Glow Discharge 

          Melville, Richard Devern Samuels (Monterey, California. Naval Postgraduate School, 1967-12);
          Compressive acoustic pulses were produced by an impulsive abnormal-glow discharge and the interaction of these pulses with the positive column of a dc neon glow discharge was studied. The acoustic pulses are analyzed and ...
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          Wullenwebber antenna vibration study 

          Breckon, Richard Louis; Hite, Philip R. (Monterey, California: U.S. Naval Postgraduate School, 1965);
          The U.S. Navy is completing a world-wide radio directional antenna system, which has exhibited an undesirable wind induced oscillation of one of the primary structural members, resulting in physical damage and failure. ...
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