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Brilliant positron sources for CLIC and other collider projects

The CLIC (Compact Linear Collider), as future linear collider, requires an intense positron source. A brief history is given up to the present baseline configuration which assumes unpolarized beams. A conventional scheme, with a single tungsten target as source of e-e+ pairs, has been studied severa...

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Autores principales: Rinolfi, Louis, Chehab, Robert, Dadoun, Olivier, Kamitani, Takuya, Strakhovenko, Vladimir, Variola, Alessandro
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:http://cds.cern.ch/record/1602023
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author Rinolfi, Louis
Chehab, Robert
Dadoun, Olivier
Kamitani, Takuya
Strakhovenko, Vladimir
Variola, Alessandro
author_facet Rinolfi, Louis
Chehab, Robert
Dadoun, Olivier
Kamitani, Takuya
Strakhovenko, Vladimir
Variola, Alessandro
author_sort Rinolfi, Louis
collection CERN
description The CLIC (Compact Linear Collider), as future linear collider, requires an intense positron source. A brief history is given up to the present baseline configuration which assumes unpolarized beams. A conventional scheme, with a single tungsten target as source of e-e+ pairs, has been studied several years ago. But, in order to reduce the beam energy deposition on the e+ target converter, a double-target system has been studied and proposed as baseline for CLIC. With this ‘‘hybrid target’’, the positron production scheme is based on the channeling process. A 5 GeV electron beam impinges on a thin crystal tungsten target aligned along its <111> axis, enhancing the photon production by channeling radiation. A large number of photons are sent to a thick amorphous tungsten target, generating large number of e-e+ pairs, while the charged particles are bent away, reducing the deposited energy and the PEDD (Peak Energy Deposition Density). The targets parameters are optimized for the positron production. Polarized positron beams are an option for CLIC, which needs R&D. Some brilliant positron sources are briefly reviewed.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
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spelling cern-16020232023-07-20T15:02:36Zhttp://cds.cern.ch/record/1602023engRinolfi, LouisChehab, RobertDadoun, OlivierKamitani, TakuyaStrakhovenko, VladimirVariola, AlessandroBrilliant positron sources for CLIC and other collider projectsAccelerators and Storage RingsThe CLIC (Compact Linear Collider), as future linear collider, requires an intense positron source. A brief history is given up to the present baseline configuration which assumes unpolarized beams. A conventional scheme, with a single tungsten target as source of e-e+ pairs, has been studied several years ago. But, in order to reduce the beam energy deposition on the e+ target converter, a double-target system has been studied and proposed as baseline for CLIC. With this ‘‘hybrid target’’, the positron production scheme is based on the channeling process. A 5 GeV electron beam impinges on a thin crystal tungsten target aligned along its <111> axis, enhancing the photon production by channeling radiation. A large number of photons are sent to a thick amorphous tungsten target, generating large number of e-e+ pairs, while the charged particles are bent away, reducing the deposited energy and the PEDD (Peak Energy Deposition Density). The targets parameters are optimized for the positron production. Polarized positron beams are an option for CLIC, which needs R&D. Some brilliant positron sources are briefly reviewed.CERN-OPEN-2013-022CLIC-Note-985oai:cds.cern.ch:16020232013-05-27
spellingShingle Accelerators and Storage Rings
Rinolfi, Louis
Chehab, Robert
Dadoun, Olivier
Kamitani, Takuya
Strakhovenko, Vladimir
Variola, Alessandro
Brilliant positron sources for CLIC and other collider projects
title Brilliant positron sources for CLIC and other collider projects
title_full Brilliant positron sources for CLIC and other collider projects
title_fullStr Brilliant positron sources for CLIC and other collider projects
title_full_unstemmed Brilliant positron sources for CLIC and other collider projects
title_short Brilliant positron sources for CLIC and other collider projects
title_sort brilliant positron sources for clic and other collider projects
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1602023
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AT chehabrobert brilliantpositronsourcesforclicandothercolliderprojects
AT dadounolivier brilliantpositronsourcesforclicandothercolliderprojects
AT kamitanitakuya brilliantpositronsourcesforclicandothercolliderprojects
AT strakhovenkovladimir brilliantpositronsourcesforclicandothercolliderprojects
AT variolaalessandro brilliantpositronsourcesforclicandothercolliderprojects