منابع مشابه
Relativistic Ionization Fronts
We derive the equations for the propagation of relativistic ionization fronts (I-fronts) in both static and moving gases, including the cosmologically-expanding intergalactic medium (IGM). We focus on the supersonic R-type phase that occurs right after a source turns on, and we compare the nonrelativistic and relativistic solutions for several important cases. Relativistic corrections can be si...
متن کاملRelativistic runaway ionization fronts.
We investigate the first example of self-consistent impact ionization fronts propagating at relativistic speeds and involving interacting, high-energy electrons. These fronts, which we name relativistic runaway ionization fronts, show remarkable features such as a bulk speed within less than one percent of the speed of light and the stochastic selection of high-energy electrons for further acce...
متن کاملFrequency Upshifting and Pulse Compression via Underdense Relativistic Ionization Fronts
When pulse of electromagnetic radiation impinges upon a moving plasmalneutral gas boundary, i.e., an ionization front, its frequency and duration are altered. The largest frequency upshifts and pulse compressions are obtained when radiation is incident on an ionization front moving at close to the speed of light. Such an ionization front is created when a short laser pulse photo-ionizes a gas t...
متن کاملTwo-dimensional collision of probe photons with relativistic ionization fronts.
The collision of a probe laser pulse with a relativistic ionization front is analyzed via two-dimensional ray-tracing theory and simulations. It is shown that collisions in higher dimensions lead to new regimes for the frequency upshift of the probe photons; the frequency upshift can be considerably higher for particular collision angles that maximize the interaction length with the ionization ...
متن کاملFingering from Ionization Fronts in Plasmas
In this paper we describe the formation of fingers from ionization fronts for a hydrodynamic plasma model. The fingers result from a balance between the destabilizing effect of impact ionization and the stabilizing effect of electron diffusion on ionization fronts. We show that electron diffusion acts as an effective surface tension on moving fronts and estimate analytically the size of the fin...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2006
ISSN: 0004-637X,1538-4357
DOI: 10.1086/506242