35,693 research outputs found
Fully QED/relativistic theory of light pressure on free electrons by isotropic radiation
A relativistic/QED theory of light pressure on electrons by an isotropic, in
particular blackbody radiation predicts thermalization rates of free electrons
over entire span of energies available in the lab and the nature. The
calculations based on the QED Klein-Nishina theory of electron-photon
scattering and relativistic Fokker-Planck equation, show that the transition
from classical (Thompson) to QED (Compton) thermalization determined by the
product of electron energy and radiation temperature, is reachable under
conditions for controlled nuclear fusion, and predicts large acceleration of
electron thermalization in the Compton domain and strong damping of plasma
oscillations at the temperatures near plasma nuclear fusion.Comment: 9 pages, 2 figures. arXiv admin note: substantial text overlap with
arXiv:1410.695
Progress in Electroweak Baryogenesis
Recent work on generating the excess of matter over antimatter in the early
universe during the electroweak phase transition is reviewed.Comment: 50 pages (figures on request), uses harvmac (table of contents
correct for "l" format), UCSD-93-2,BU-HEP-93-
Ordered structures and jet noise
A series of measurements of near field pressures and turbulent velocity fluctuations were made in a jet having a Reynolds number of about 50,000 in order to investigate more quantitatively the character and behavior of the large scale structures, and to ascertain their importance to the jet noise problem. It was found that the process of interaction between vortices can be inhibited by artificially exciting the shear layers with periodic disturbances of certain frequency. The turbulent fluctuation amplitudes measured at four diameters downstream decreased considerably. Finally, it was observed that the passage frequency of the structures decreased with x in a similar manner as the frequency corresponding to the maximum intensity radiation emanating from the same value of x
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