Gutenberg Open Science: Design study for a 500 MeV positron beam at the Mainz Microtron MAMI

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-8361

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DC Field	Value	Language
dc.contributor.author	Backe, Hartmut	-
dc.contributor.author	Lauth, Werner	-
dc.contributor.author	Drexler, Peter	-
dc.contributor.author	Heil, Philipp	-
dc.contributor.author	Klag, Pascal	-
dc.contributor.author	Ledroit, Ben	-
dc.contributor.author	Stieler, Frederic	-
dc.date.accessioned	2022-12-19T08:32:35Z	-
dc.date.available	2022-12-19T08:32:35Z	-
dc.date.issued	2022	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/8377	-
dc.description.abstract	A design study has been performed for a positron beam with an energy of 500 MeV to be realized at the applied physics area of the Mainz Microtron MAMI. Positrons will be created after pair conversion of bremsstrahlung, produced by the 855 MeV electron beam at MAMI in a tungsten converter target. From the two conceivable geometries (1) pair conversion in the bremsstrahlung converter target itself, and (2) bremsstrahlung pair conversion in a separated lead foil, the former was considered in detail. Positrons will be energy selected within an outside open electron beam-line bending magnet, and bent back by an additional sector magnet. Magnetic focusing elements in between are designed to prepare in a well shielded positron target chamber about 6 m away from the target a beam with horizontal and vertical emittances of ϵv = 0.055 π mm mrad (1 σ), and ϵh=0.12π mm mrad (1 σ), respectively, for a 10 μm thick amorphous tungsten target and negligible momentum spread. At an accepted positron band width of 1 MeV, spots are expected vertically with an angular spread of 0.064 mrad and a size of 5.0 mm (FWHM), and horizontally with an angular spread of 0.64 mrad and a size of 7.7 mm (FWHM). The positron yield amounts to 13.1 per second, 1 MeV positron energy band width, and 1 nA electron beam current.	en_GB
dc.description.sponsorship	Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 491381577	de
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	530 Physik	de_DE
dc.subject.ddc	530 Physics	en_GB
dc.title	Design study for a 500 MeV positron beam at the Mainz Microtron MAMI	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-8361	-
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 08 Physik, Mathematik u. Informatik	de
jgu.organisation.number	7940	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	The European physical journal : D	de
jgu.journal.volume	76	de
jgu.pages.alternative	150	de
jgu.publisher.year	2022	-
jgu.publisher.name	Springer	de
jgu.publisher.place	Berlin u.a.	de
jgu.publisher.issn	1434-6079	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	530	de
jgu.publisher.doi	10.1140/epjd/s10053-022-00465-9	de
jgu.organisation.ror	https://ror.org/023b0x485	-
jgu.subject.dfg	Naturwissenschaften	de
Appears in collections:	DFG-491381577-H

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