Open AccessPositron Yield as a Function of Drive Beam Energy for a K=1, Planar Undulator-Based Source(LCC-0090)
Author(s) -
Jackson Sheppard
Publication year - 2003
Language(s) - English
Resource type - Reports
DOI - 10.2172/826493
Subject(s) - undulator , positron , beam (structure) , yield (engineering) , thermal emittance , physics , atomic physics , planar , range (aeronautics) , phase space , beam emittance , linear particle accelerator , nuclear physics , materials science , optics , electron , computer science , thermodynamics , computer graphics (images) , composite material
The yield of positrons as a function of drive beam energy for a K=1, planar undulator-based positron source is evaluated using the EGS4 simulation code. Raw yield, yield into a fixed phase space acceptance, and rms emittance of emitted positrons is calculated. For a fixed geometry, the yield varies as the square of the drive beam energy. A faster fall off at the low energy end is seen and is due to reduced emission of positrons produced with initially low energies (in the range of a few MeV). The yield of positrons as a function of drive beam energy for a K=1, planar undulator-based positron source is evaluated using the EGS4 simulation code. Raw yield, yield into a fixed phase space acceptance, and rms emittance of emitted positrons is calculated. For a fixed geometry, the yield varies as the square of the drive beam energy. A faster fall off at the low energy end is seen and is due to reduced emission of positrons produced with initially low energies (in the range of a few MeV).
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