Evaluation of a positron-beam-pulsing system in KUR reactor-based positron beam facility

14th International Workshop on Slow Positron Beam Techniques & Applications

Yabuuchi, A.^1 ; Kinomura, A.^1 ; Kuzuya, Y.^1 ; Sato, K.^2 ; Xu, Q.^1 ; Oshima, N.^3 ; O'Rourke, B.E.^3

Research Reactor Institute, Kyoto University, Kumatori, Osaka

590-0494, Japan^1

Department of Mechanical Engineering, Kagoshima University, Kagoshima

890-0065, Japan^2

National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Tsukuba

305-8568, Japan^3

关键词: Beam lines;    Electron pulse;    Kyoto University Research Reactors;    Positron annihilation lifetime measurement;    Positron beams;    Pulsing system;    Slow positron;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/791/1/012013/pdf
DOI  :  10.1088/1742-6596/791/1/012013

来源: IOP

【 摘 要 】

The pulsing performance of the positron-beam-pulsing system of the slow positron beamline at Kyoto University research Reactor was tested using electron beams trimmed by 5-mm- or 15-mm-diameter apertures. Electron pulses with full width at half maximum of 143 ps were obtained with a 5-mm-diameter beam which corresponds to the diameter of the brightness-enhanced positron beam. This indicates the pulsing system has a sufficient pulsing performance for positron annihilation lifetime measurements.