796 research outputs found
Broadband optical gain via interference in the free electron laser: principles and proposed realizations
We propose experimentally simplified schemes of an optically dispersive
interface region between two coupled free electron lasers (FELs), aimed at
achieving a much broader gain bandwidth than in a conventional FEL or a
conventional optical klystron composed of two separated FELs. The proposed
schemes can {\it universally} enhance the gain of FELs, regardless of their
design when operated in the short pulsed regime
Dynamical interpretation of chemical freeze-out in heavy ion collisions
It is demonstrated that there exists a direct correlation between chemical
freeze-out point and the softest point of the equation of state where the
pressure divided by the energy density, , has a minimum.
A dynamical model is given as an example where the passage of the softest point
coincides with the condition for chemical freeze-out, namely an average energy
per hadron 1 GeV. The sensitivity of the result to the equation of
state used is discussed.Comment: 10 pages, 2 figure
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