On the macroscopic formation length for GeV photons

H. D. Thomsen; J. Esberg; K. Kirsebom; H. Knudsen; E. Uggerhøj; U. I. Uggerhøj; P. Sona; A. Mangiarotti; T. J. Ketel; A. Dizdar; M. M. Dalton; S. Ballestrero; S. H. Connell

doi:10.1016/j.physletb.2009.01.053

On the macroscopic formation length for GeV photons

H. D. Thomsen, J. Esberg, K. Kirsebom, H. Knudsen, E. Uggerhøj, U. I. Uggerhøj, P. Sona, A. Mangiarotti, T. J. Ketel, A. Dizdar, M. M. Dalton, S. Ballestrero, S. H. Connell

Physics

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11 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	323-327
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	672
Issue number	4-5
DOIs	https://doi.org/10.1016/j.physletb.2009.01.053
Publication status	Published - 2 Mar 2009

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.physletb.2009.01.053

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Thomsen, H. D., Esberg, J., Kirsebom, K., Knudsen, H., Uggerhøj, E., Uggerhøj, U. I., Sona, P., Mangiarotti, A., Ketel, T. J., Dizdar, A., Dalton, M. M., Ballestrero, S., & Connell, S. H. (2009). On the macroscopic formation length for GeV photons. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 672(4-5), 323-327. https://doi.org/10.1016/j.physletb.2009.01.053

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title = "On the macroscopic formation length for GeV photons",

abstract = "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.",

author = "Thomsen, {H. D.} and J. Esberg and K. Kirsebom and H. Knudsen and E. Uggerh{\o}j and Uggerh{\o}j, {U. I.} and P. Sona and A. Mangiarotti and Ketel, {T. J.} and A. Dizdar and Dalton, {M. M.} and S. Ballestrero and Connell, {S. H.}",

year = "2009",

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doi = "10.1016/j.physletb.2009.01.053",

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journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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Thomsen, HD, Esberg, J, Kirsebom, K, Knudsen, H, Uggerhøj, E, Uggerhøj, UI, Sona, P, Mangiarotti, A, Ketel, TJ, Dizdar, A, Dalton, MM, Ballestrero, S & Connell, SH 2009, 'On the macroscopic formation length for GeV photons', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 672, no. 4-5, pp. 323-327. https://doi.org/10.1016/j.physletb.2009.01.053

TY - JOUR

T1 - On the macroscopic formation length for GeV photons

AU - Thomsen, H. D.

AU - Esberg, J.

AU - Kirsebom, K.

AU - Knudsen, H.

AU - Uggerhøj, E.

AU - Uggerhøj, U. I.

AU - Sona, P.

AU - Mangiarotti, A.

AU - Ketel, T. J.

AU - Dizdar, A.

AU - Dalton, M. M.

AU - Ballestrero, S.

AU - Connell, S. H.

PY - 2009/3/2

Y1 - 2009/3/2

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=60449102242&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2009.01.053

DO - 10.1016/j.physletb.2009.01.053

M3 - Article

AN - SCOPUS:60449102242

SN - 0370-2693

VL - 672

SP - 323

EP - 327

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 4-5

ER -

On the macroscopic formation length for GeV photons

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