On the macroscopic formation length for GeV photons

Experimental results for the radiative energy loss of 206 and 234 GeV electrons in 5–10 μm thin Ta targets are presented. An increase in radiation emission probability at low photon energies compared to a 100 μm thick target is observed. This increase is due to the formation length of the GeV photon...

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Detalles Bibliográficos
Autores principales: Thomsen, H D, Esberg, J, Kirsebom, K, Knudsen, H, Uggerhøj, E, Uggerhøj1, U I, Sona, P, Mangiarotti, A, Ketel, T J, Dizdar, A, Dalton, M M, Ballestrero, S, Connell, S H
Lenguaje:eng
Publicado: 2009
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2009.01.053
http://cds.cern.ch/record/1495626
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author Thomsen, H D
Esberg, J
Kirsebom, K
Knudsen, H
Uggerhøj, E
Uggerhøj1, U I
Sona, P
Mangiarotti, A
Ketel, T J
Dizdar, A
Dalton, M M
Ballestrero, S
Connell, S H
author_facet Thomsen, H D
Esberg, J
Kirsebom, K
Knudsen, H
Uggerhøj, E
Uggerhøj1, U I
Sona, P
Mangiarotti, A
Ketel, T J
Dizdar, A
Dalton, M M
Ballestrero, S
Connell, S H
author_sort Thomsen, H D
collection CERN
description Experimental results for the radiative energy loss of 206 and 234 GeV electrons in 5–10 μm thin Ta targets are presented. An increase in radiation emission probability at low photon energies compared to a 100 μm thick target is observed. This increase is due to the formation length of the GeV photons exceeding the thickness of the thin foils, the so-called Ternovskii–Shul'ga–Fomin (TSF) effect. The formation length of GeV photons from a multi-hundred GeV projectile is through the TSF effect shown directly to be a factor 1010 longer than their wavelength.
id cern-1495626
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
record_format invenio
spelling cern-14956262019-09-30T06:29:59Zdoi:10.1016/j.physletb.2009.01.053http://cds.cern.ch/record/1495626engThomsen, H DEsberg, JKirsebom, KKnudsen, HUggerhøj, EUggerhøj1, U ISona, PMangiarotti, AKetel, T JDizdar, ADalton, M MBallestrero, SConnell, S HOn the macroscopic formation length for GeV photonsParticle Physics - ExperimentExperimental results for the radiative energy loss of 206 and 234 GeV electrons in 5–10 μm thin Ta targets are presented. An increase in radiation emission probability at low photon energies compared to a 100 μm thick target is observed. This increase is due to the formation length of the GeV photons exceeding the thickness of the thin foils, the so-called Ternovskii–Shul'ga–Fomin (TSF) effect. The formation length of GeV photons from a multi-hundred GeV projectile is through the TSF effect shown directly to be a factor 1010 longer than their wavelength.oai:cds.cern.ch:14956262009
spellingShingle Particle Physics - Experiment
Thomsen, H D
Esberg, J
Kirsebom, K
Knudsen, H
Uggerhøj, E
Uggerhøj1, U I
Sona, P
Mangiarotti, A
Ketel, T J
Dizdar, A
Dalton, M M
Ballestrero, S
Connell, S H
On the macroscopic formation length for GeV photons
title On the macroscopic formation length for GeV photons
title_full On the macroscopic formation length for GeV photons
title_fullStr On the macroscopic formation length for GeV photons
title_full_unstemmed On the macroscopic formation length for GeV photons
title_short On the macroscopic formation length for GeV photons
title_sort on the macroscopic formation length for gev photons
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/j.physletb.2009.01.053
http://cds.cern.ch/record/1495626
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