Hybrid scheme of positron source at SPARC_LAB LNF facility S. V. Abdrashitov, O. V. Bogdanov, S. B. Dabagov [et al.]
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ArticleSubject(s): гибридные схемы | фоторождение | позитроны | осевое каналированиеGenre/Form: статьи в журналах Online resources: Click here to access online
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Nuclear instruments and methods in physics research. Section B : Beam interactions with materials and atoms Vol. 355. P. 65-68Abstract: The hybrid scheme of the positron source for SPARC_LAB LNF facility (Frascati, Italy) is proposed. The comparison of the positron yield in a thin amorphous W converter of 0.1 mm thickness produced by bremsstrahlung, by axial 〈1 0 0〉 and planar (1 1 0) channeling radiations in a W crystal is performed for the positron energy range of 1 ÷ 3 MeV. It is shown that the radiation from 200 MeV electrons (parameters of SPARC_LAB LNF Frascati) in a 10 μm W crystal can produce positrons in the radiator of 0.1 mm thickness with the rate of 10–102 s−1 at planar channeling, of 102–103 s−1 at bremsstrahlung and of 103–104 s−1 at axial channeling.
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The hybrid scheme of the positron source for SPARC_LAB LNF facility (Frascati, Italy) is proposed. The comparison of the positron yield in a thin amorphous W converter of 0.1 mm thickness produced by bremsstrahlung, by axial 〈1 0 0〉 and planar (1 1 0) channeling radiations in a W crystal is performed for the positron energy range of 1 ÷ 3 MeV. It is shown that the radiation from 200 MeV electrons (parameters of SPARC_LAB LNF Frascati) in a 10 μm W crystal can produce positrons in the radiator of 0.1 mm thickness with the rate of 10–102 s−1 at planar channeling, of 102–103 s−1 at bremsstrahlung and of 103–104 s−1 at axial channeling.
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