ACTA

High Stability Positron Beam Generation Based on Ultra-intense Laser

F. Lei^a, J. Jing^a, M. Yan-Yun^a, Z. Zi-Jia^a, L. Yi-Fei^b, T. Jun-Hao^b, F. Jie^b, Z. Chang-Qing^b, C. Li-Ming^b, L. Song^c, N. Hafz^c
^aDepartment of Physics, National University of Defense Technology, Changsha. 410073, China
^bInstitute of Physics CAS, Beijing, 100190, China
^cParticle and Terahertz Sources Division, ELI-ALPS, ELI-HU Non-Profit, Ltd., H-6720 Szeged, Hungary

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Relativistic positron beams were generated by laser wakefield electrons bombarding on solid target. Very stable positron beams were generated in our experiments. The total yield of positrons is about 4.4×10⁸/shot. The energy spectra of positrons and electrons obey quasi-Maxwell distribution. Compared with the direct method, the indirect method produces positrons (38.5 MeV) and electrons (50.5 MeV) with much higher slope temperature.

DOI:10.12693/APhysPolA.137.156
PACS numbers: 52.38.Kd, 52.59.-f, 25.20.-x