Organization:
Physics (PH)

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The mission of the Physics Department is to provide defense-relevant, advanced education and research programs to meet Naval unique needs, and increase the warfighting effectiveness of the U.S. Naval Forces, DoD and allied armed forces.
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Publication Search Results

Now showing 1 - 10 of 20
  • Publication
    Cerenkov radiation in the neighborhood of the emission threshold
    (Monterey, CA; Naval Postgraduate School, 1984) Buskirk, Fred R.; Neighbours, John R.; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Naval Postgraduate School (U.S.); Dept. of Physics
  • Publication
    Cerenkov and sub-Cerenkov radiation from a charged particle beam
    (Monterey, CA; Naval Postgraduate School, 1987) Neighbours, John R.; Buskirk, Fred R.; Maruyama, Xavier K.; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Naval Postgraduate School (U.S.); Physics
    As a consequence of the relaxation of the phasing conditions between the moving charge and radiated wave for finite beam path lengths, the Cerenkov peak is broadened and the threshold energy is developed which is applicable to charged beams consisting of single point charge or charge bunch of finite size, as well as beams consisting of periodically repeated bunches
  • Publication
    A perturbation theory for light diffraction from a bigrating with multiple surface-polariton excitation
    (Monterey, CA; Naval Postgraduate School, 1986-12) Glass, Nathaniel E.; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Naval Postgraduate School (U.S.); Dept. of Physics
    A perturbation theory has recently been developed for treating the diffration of light, with surface polariton resonant excitation, from a bigrating surface. The theory is an approximation, to first order in the grating height, of an earlier theory based on the Rayleigh hypothesis. The perturbation theory holds for arbitrary polarization and for arbitrary plane of incidence with respect to the grating directions. It is, however, limited to treating only the possibility of two simultaneous resonant evanescent waves, whereas four are possible at normal incidence on a square grating, and three are possible on a rectangular grating. The present work generalizes the earlier work to allow for a four fold (or three fold) resonance. This extension also allows one now to determine the complex dispersion relation for surface-polaritons, for wavevectors at the intersection of two Brillouin zone boundary lines (not possible in the previous formulation). Keywords: Smith Purcell radiation; Bigrating; Grating; Surface plasmon; Polariton
  • Publication
    System for laser spot profile analysis
    (Monterey, CA; Naval Postgraduate School, 1983-05) Crittenden, Eugene Casson; Milne, Edmund Alexander; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Naval Postgraduate School (U.S.); Dept. of Physics
  • Publication
    Emission threshold for Cerenkov radiation
    (Monterey, CA; Naval Postgraduate School, 1985) Neighbours, John R.; Buskirk, Fred R.; Maruyama, Xavier K.; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Naval Postgraduate School (U.S.); Physics
  • Publication
    Modification, testing, and calibration of infrared search and target designator hardware received from NSWC
    (Monterey, California. Naval Postgraduate School, 1989-05) Crittenden, Eugene Casson; Cooper, Alfred William Madison; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Physics
  • Publication
    Laser altimeter for use over the ocean
    (Monterey, California. Naval Postgraduate School, 1989-04) Bourne, Carlton M.; Crittenden, Eugene Casson; Rodeback, George Wayne; Cooper, Alfred William; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Physics
  • Publication
    Observation of microwave Cerenkov radiation as a diffraction pattern
    (Monterey, CA; Naval Postgraduate School, 1985-08-01) Maruyama, Xavier K.; Neighbours, John R.; Buskirk, Fred R.; Snyder, D. D.; Bruce, Robert G.; Vujaklija, Milorad; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Naval Postgraduate School (U.S.); Physics
    Measurement of microwave Cerenkov radiation in air exhibits the diffraction pattern predicted in earlier work. The radiation appears only at harmonics of the frequency of periodic electron bunches, angular distribution power measurements are presented for frequencies of 2.86, 5.71, 8.57 and 11 & 12 GHz corresponding to the fundamental and the first three harmonics of an S band RF linac
  • Publication
    Measured plume dispersion parameters over water. Volume I
    (Monterey, CA; Naval Postgraduate School, 1984-09) Skupniewicz, C. E.; Schacher, G. E. (Gordon Everett); Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Naval Postgraduate School (U.S.); Dept. of Physics
  • Publication
    Professor John Dyer Memorial Lecture : the origin of the universe from quantum chaos, an introduction to current ideas
    (Monterey, California. Naval Postgraduate School, 1989-05) Woehler, Karlheinz E.; Physics (PH); Graduate School of Operational and Information Sciences (GSOIS); Physics
    In his recently published book 'A Brief History of Time', S. Hawking describes his remarkable insights into the problem of the origin of our universe. In this talk a more quantitative description of some of the important principles from this book is presented as a mathematical appendix to it. A brief review of the ideas of the Standard Big Bang Model of the Universe is given in terms of the evolution equation that follows from Einstein's theory. The meaning of the Cosmological Constant, its relation to Vacuum Energy, the model of the empty DeSitter Space and Gravity is derived. By analogy to Schrodinger mechanics one can give the general features of Quantum Cosmology', in which the origin of the universe can be viewed as a Quantum tunneling process in imaginary time from a Quantum Chaos state of no space, no time, no matter to an inflationary expanding DeSitter space which eventually transits into the Hot Big Bang Expansion that we see