1. A positron source using an axially oriented crystal associated to a granular amorphous converter
- Author
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Xu, C., Chehab, R., Sievers, P., Artru, X., Chevallier, M., Dadoun, O., Pei, G., Stakhovenko, V., Variola, A., Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institute of High Energy Physics (IHEP), Chinese Academy of Sciences [Changchun Branch] (CAS), CAS-PHABIO, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), European Organization for Nuclear Research (CERN), Théorie, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Budker Institute of Nuclear Physics (BINP), and Siberian Branch of the Russian Academy of Sciences (SB RAS)
- Subjects
Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,Oriented crystal ,[PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph] ,Photon radiation ,chemistry.chemical_element ,Astronomy and Astrophysics ,Electron ,Tungsten ,01 natural sciences ,7. Clean energy ,Amorphous solid ,Crystal ,Positron ,chemistry ,0103 physical sciences ,Physics::Accelerator Physics ,Atomic physics ,010306 general physics ,Axial symmetry ,Instrumentation - Abstract
Submitted to Chinese Physics C; A non conventional positron source using the intense γ radiation from an axially oriented monocrystal which materialize into e+e- pairs in a granular amorphous converter is described. The enhancement of photon radiation by multi-GeV electrons crossing a tungsten crystal along its axis is reported. The resulting enhancement of pair production in an amorphous converter placed 2 meters downstream, is also reported. Sweeping off the charged particles from the crystal by a bending magnet upstream of the converter allows a significant reduction of the deposited energy density. Substituting a granular target made of small spheres to the usual compact one, makes easier the energy dissipation. The deposited energy and corresponding heating are analyzed and solutions for cooling are proposed. The configurations studied here for this kind of positron source allow its consideration for unpolarized positrons for the ILC.
- Published
- 2012