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Titolo:
Experiment of positron generation using a crystal target at the KEK electron/positron linac
Autore:
Inoue, M; Takenaka, S; Yoshida, K; Endo, I; Iinuma, M; Takahashi, T; Bogdanov, AV; Kolchuzkin, AM; Potylitsin, AP; Vnukov, IE; Okuno, H; Anami, S; Enomoto, A; Furukawa, K; Kamitani, T; Ogawa, Y; Ohsawa, S;
Indirizzi:
Hiroshima Univ, Ctr Synchrotron Radiat, Higashihiroshima 7398526, Japan Hiroshima Univ Higashihiroshima Japan 7398526 hihiroshima 7398526, Japan Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima 7398526, Japan Hiroshima Univ Higashihiroshima Japan 7398526 hihiroshima 7398526, Japan Tomsk Polytech Univ, Inst Nucl Phys, Tomsk 634050, Russia Tomsk Polytech Univ Tomsk Russia 634050 Nucl Phys, Tomsk 634050, Russia Tanashi Branch, High Energy Accelerator Res Org, Tokyo 1888501, Japan Tanashi Branch Tokyo Japan 1888501 lerator Res Org, Tokyo 1888501, Japan High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan High Energy Accelerator Res Org Tsukuba Ibaraki Japan 3050801 0801, Japan
Titolo Testata:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
fascicolo: 1-2, volume: 173, anno: 2001,
pagine: 104 - 111
SICI:
0168-583X(200101)173:1-2<104:EOPGUA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
RELATIVISTIC ELECTRONS;
Keywords:
linear accelerator; positron production; target; crystal tungsten; channeling radiation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Yoshida, K Hiroshima Univ, Ctr Synchrotron Radiat, 2-313 Kagamiyama, Higashihiroshima7398526, Japan Hiroshima Univ 2-313 Kagamiyama HigashihiroshimaJapan 7398526
Citazione:
M. Inoue et al., "Experiment of positron generation using a crystal target at the KEK electron/positron linac", NUCL INST B, 173(1-2), 2001, pp. 104-111

Abstract

We have performed an experiment of positron generation using a crystal target at an electron/positron linac at KEK. The target consists of a tungstencrystal to emit photons and an amorphous tungsten for pair creation, whosethicknesses are 0.5 and 2.0 radiation length, respectively. When the (III)crystal axis is oriented parallel to the 3 GeV incident electron beam, the positron yield is enhanced by 40% compared to values for the disoriented crystal. No effect of injecting intense ultra-short electron bunches on the crystalline structure is observed. The crystal orientation dependence of thepositron yield as well as the enhancement factor can be explained by a simulation assuming a coherent bremsstrahlung process of the electron in the crystal. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 23/01/21 alle ore 03:43:02