Computer simulation of electron-positron pair production by channeling radiation in amorphous converter

11th International Symposium on Radiation from Relativistic Electrons in Periodic Structures

Abdrashitov, S.V.^1,2 ; Bogdanov, O.V.^1,2 ; Dabagov, S.B.^3,4,5 ; Pivovarov, Yu L^1 ; Tukhfatullin, T.A.^1

National Research Tomsk Polytechnic University, Lenin Ave. 30, Tomsk

634050, Russia^1

National Research Tomsk State University, Lenin Ave. 36, Tomsk

634050, Russia^2

INFN - Laboratori Nazionali di Frascati, Via E. Fermi 40, Frascati (RM)

I-00044, Italy^3

RAS PN Lebedev Physical Institute, Lenin Ave. 53, Moscow

119991, Russia^4

NRNU MEPhI, Kashirskoe highway 31, Moscow

115409, Russia^5

关键词: Axial channeling;    Channeling radiation;    Electron positron pair production;    Total yield;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/732/1/012021/pdf
DOI  :  10.1088/1742-6596/732/1/012021

来源: IOP

【 摘 要 】

We consider the radiator-converter approach at 200 MeV channeled electrons (the SPARC-LAB LNF facility energies) for the case of using W crystalline radiator and W amorphous converter. A comparison of the positron production by the axial channeling radiation and the bremsstrahlung is performed. The positron stopping in the convertor is studied by means of computer simulations. It is shown that for the maximum yield of positrons the thickness of the W amorphous converter should be taken 0.35 cm in the case of using the axial channeling radiation resulting to total yield of positrons 5 10-3e+/e-and 0.71 cm in the case of using the bremsstrahlung resulting to total yield of positrons 3.3 10-3e+/e-.