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

Research output: Contribution to journal › Article › peer-review

13 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",

month = mar,

day = "2",

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

language = "English",

volume = "672",

pages = "323--327",

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 - https://www.scopus.com/pages/publications/60449102242

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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