Positron sources using channeling: A promising device for linear colliders

Artru, X. and Chaikovska, I. and Chehab, R. and Chevallier, M. and Dadoun, O. and Furukawa, K. and Kamitani, T. and Omori, T. and Pei, G. and Poirier, F. and Rinolfi, L. and Satoh, M. and Strakhovenko, V. M. and Sugimura, T. and Suwada, T. and Takahashi, T. and Umemori, K. and Urakawa, J. and Variola, A. and Vivoli, A. and Xu, C. (2011) Positron sources using channeling: A promising device for linear colliders. Il nuovo cimento C, 34 (4). pp. 141-148. ISSN 1826-9885

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The need of intense and bright positron sources for linear colliders has urged the researches on polarized and unpolarized positrons. For 20 years, continuous theoretical and experimental investigations on unpolarized positron sources using axially channelled electrons in aligned monocrystals have pointed to efficient solutions concerning not only the source intensity, but also the minimization of the deposited energy. Simulations using the channelling programme of V. Strakhovenko associated to GEANT4, provided a description of such sources composed of tungsten crystals as photon radiators and amorphous tungsten as converters, the so-called hybrid source; the incident electron energies are taken between 5 and 10 GeV. Here, some applications are shown for CLIC, for which this source is the baseline, and also for ILC. The simulations are also concerning the test at KEK of such hybrid source, with a sweeping magnet separating the crystal radiator and an amorphous converter. Future developments on the simulation programme are also reported. The main issues for such sources are also analyzed.

Item Type: Article
Uncontrolled Keywords: Linear accelerators ; Particle sources and targets ; Physical radiation effects, radiation damage ; Channeling phenomena (blocking, energy loss, etc.)
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 07 Apr 2020 16:02
Last Modified: 07 Apr 2020 16:02
URI: http://eprints.bice.rm.cnr.it/id/eprint/17326

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