Total yield and spectra of positrons produced by channeling radiation from 0.1 ÷ 1.6 GeV electrons

被引：7

作者：

Abdrashitov, S. V. ^{[1
,2
]}

Bogdanov, O. V. ^{[1
,2
]}

Dabagov, S. B. ^{[3
,4
,5
]}

Pivovarov, Yu. L. ^{[1
]}

Tukhfatullin, T. A. ^{[1
]}

机构：

[1] Natl Res Tomsk Polytech Univ, Lenin Ave 30, Tomsk 634050, Russia

[2] Natl Res Tomsk State Univ, Lenin Ave 36, Tomsk 634050, Russia

[3] INFN Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, RM, Italy

[4] RAS PN Lebedev Phys Inst, Lenin Ave 53, Moscow 119991, Russia

[5] NRNU MEPhI, Kashirskoe Highway 31, Moscow 115409, Russia

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2017年 / 402卷

关键词：

Channeling radiation; Photon; Positron source; RELATIVISTIC ELECTRONS; SIMULATION;

D O I：

10.1016/j.nimb.2017.03.105

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The hybrid scheme of positron source involving channeling radiation from 0.1 divided by 1.6 GeV < 1 0 0 > channeled electrons in a crystalline W target (radiator) and subsequent electron-positron pair production in a downstream thick amorphous W target (converter) is investigated by means of computer simulation using the BCM-1 code. Computer simulation is carried out taking into account positron energy loss in a thick converter. Total yield of positrons as a function of the thickness of the converter as well as the energy spectrum of positrons for the chosen converter thickness are obtained. According to the calculations, the total yield of positrons produced by channeling radiation from 0.1 divided by 1.6 GeV electrons in a 10 mu m W crystal equals 0.5 divided by 160 positrons per 10(3) incident electrons, respectively, with the maximum of positron energy spectrum in the energy range 1 divided by 3 MeV. Calculations are performed within the framework of the planned experimental program at SPARC_LAB LNF. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：54 / 57

页数：4

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