Positron Yield as a Function of Drive Beam Energy for a K=1, Planar Undulator-Based Source.

Sheppard, J. C.

Technical Information Center Oak Ridge Tennessee

关键词: Positrons;    Electron beam;    Positron sources;    Wiggler magnets;    Beam production;   

RP-ID  :  DE2004826493

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

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).