Design and simulation of a pulsed positron beam at ELI-NP

14th International Workshop on Slow Positron Beam Techniques & Applications

Djourelov, N.^1 ; Dinescu, D.^1

Extreme Light Infrastructure - Nuclear Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, P.O. Box MG-6, Magurele, Ilfov county

077125, Romania^1

关键词: Back-scattered;    Bunchers;    Comsol multiphysics;    Design and simulation;    Effective solution;    MATLAB program;    Pulsed positron beams;    Pulsing system;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/791/1/012010/pdf
DOI  :  10.1088/1742-6596/791/1/012010

来源: IOP

【 摘 要 】

The design of the pulsing system for the slow e+beam at ELI-NP is presented. It will deliver narrow time width e+pulses, achieved by a combination of prebuncher, chopper and buncher. The effect of the different components on the pulse compression is simulated by a Matlab program. The results show that the best compression of the e+pulses, which can be achieved by the proposed pulsing system, is limited to about 100 ps (FWHM). The most effective solution, applied up to now, for minimizing the influence of the backscattered e+on the PALS spectra by using a bent tube filter is simulated by Comsol Multiphysics.