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Design and Simulation of a Trap-based Pulsed Slow Positron Beam
He Chunqing * #,Wang Juncheng,Zhu Jun,Wang Shaojie
Key Lab of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072
*Correspondence author
#Submitted by
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Funding: National Natural Science Foundation of China （No.No.10975108 ), National Natural Science Foundation of China）
Opened online: 6 November 2012
Accepted by: none
Citation: He Chunqing,Wang Juncheng,Zhu Jun.Design and Simulation of a Trap-based Pulsed Slow Positron Beam[OL]. [ 6 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4493655
 
 
A simple pulsed slow positron beam based on a Penning-trap has been designed and is being constructed in Wuhan University. The cooled positrons from the trap with very low energy dispersion are dumped and chopped to pulses of a few tens of ns in width. Positron pulses are bunched by adjusting the potential of drift tube using an arbitrary wave generator, then accelerated to the target. Influences of the pulse width, the energy dispersion of positrons etc. on the time resolution of bunched positron pulse are simulated. The result shows that lower energy dispersion of positrons leads to much narrower positron pulses, indicating that a trap-based slow positron beam has a great advantage in developing a pulsed slow positron beam.
Keywords:positron; slow positron beam; Penning-trap; bunching; energy dispersion; time resolution
 
 
 

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