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CERN Document Server Pronađeno je 12 zapisa  1 - 10slijedeći  idi na zapis: Pretraživanje je potrajalo 1.32 sekundi 
1.
Radiation emission as a virtually exact realization of Heisenbergs microscope / Andersen, K K (Aarhus U.) ; Brock, S (Aarhus U. (main)) ; Esberg, J (Aarhus U.) ; Thomsen, H D (Aarhus U.) ; Uggerhøj, U I (Aarhus U.)
Through the concept of ‘formation length’, recently observed directly in the radiation emission from ultrarelativistic electrons and an essential component in the interpretation of strong field radiation from electrons penetrating single crystals, we discuss the indeterminacy in the location of radiation emission. The analogy with the indeterminacy in the Heisenberg microscope Gedanken experiment is demonstrated from a number of viewpoints to be almost exact. [...]
2013 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., B 315 (2013) 278-282
2.
Measurements of the spectral location of the structured target resonance for ultrarelativistic electrons / CERN NA63 Collaboration
2014 - 6 p. - Published in : Phys. Lett. B 732 (2014) 309-314 Elsevier Open Access article: PDF;
3.
Experimental investigation of the Landau-Pomeranchuk-Migdal effect in low-Z targets / Andersen, K.K. (Aarhus U.) ; Andersen, S.L. (Aarhus U.) ; Esberg, J. (CERN) ; Knudsen, H. (Aarhus U.) ; Mikkelsen, R.E. (Aarhus U.) ; Uggerhøj, U.I. (Aarhus U.) ; Wistisen, T.N. (Aarhus U.) ; Sona, P. (Florence U.) ; Mangiarotti, A. (Sao Paulo U.) ; Ketel, T.J. (Vrije U., Amsterdam) /CERN NA63 Collaboration
In the CERN NA63 collaboration we have addressed the question of the potential inadequacy of the commonly used Migdal formulation of the Landau-Pomeranchuk-Migdal (LPM) effect by measuring the photon emission by 20 and 178 GeV electrons in the range 100 MeV - 4 GeV, in targets of LowDensityPolyEthylene (LDPE), C, Al, Ti, Fe, Cu, Mo and, as a reference target, Ta. For each target and energy, a comparison between simulated values based on the LPM suppression of incoherent bremsstrahlung is shown, taking multi-photon effects into account. [...]
arXiv:1309.5765.- 2013-10-15 - 8 p. - Published in : Phys. Rev. D 88 (2013) 072007 APS published version, local copy: PDF; Fulltext: PDF; External link: Preprint
4.
Physics at the CLIC $e^{+}e^{-}$ Linear Collider - Input to the Snowmass process 2013 / Abramowicz, H. (Tel Aviv U.) ; Abusleme, A. (Chile U., Catolica) ; Afanaciev, K. (Minsk, High Energy Phys. Ctr.) ; Alexander, G. (Tel Aviv U.) ; Alipour Tehrani, N. (CERN) ; Alonso, O. (Barcelona U.) ; Andersen, K.K. (Aarhus U.) ; Arfaoui, S. (CERN) ; Balazs, C. (Monash U.) ; Barklow, T. (SLAC) et al. /CLIC Detector and Physics Study
This paper summarizes the physics potential of the CLIC high-energy e+e- linear collider. It provides input to the Snowmass 2013 process for the energy-frontier working groups on The Higgs Boson (HE1), Precision Study of Electroweak Interactions (HE2), Fully Understanding the Top Quark (HE3), as well as The Path Beyond the Standard Model -- New Particles, Forces, and Dimensions (HE4). [...]
arXiv:1307.5288.- 2013 - 31 p. Fulltext: PDF; External links: PDF on ECONF; Proceedings write-up on ECONF
In : Community Summer Study 2013 : Snowmass on the Mississippi, Minneapolis, MN, USA, 29 Jul - 6 Aug 2013
5.
Comparison of analytical and Monte Carlo calculations of multi-photon effects in bremsstrahlung emission by high-energy electrons / Mangiarotti, A (LIP, Coimbra ; Coimbra U.) ; Sona, P (Florence U. ; INFN, Florence) ; Ballestrero, S (Witwatersrand U. ; CERN) ; Uggerhoj, U I (Aarhus U.) ; Andersen, K K (Aarhus U.)
2012 - 13 p. - Published in : Nucl. Instrum. Methods Phys. Res., B 289 (2012) 5-17
6.
Direct measurement of the formation length of photons / Andersen, Kristoffer K (Aarhus U.) ; Andersen, Søren L (Aarhus U.) ; Esberg, Jakob (Aarhus U.) ; Knudsen, Helge (Aarhus U.) ; Mikkelsen, Rune (Aarhus U.) ; Uggerhøj, Ulrik I (Aarhus U.) ; Sona, Pietro (Florence U.) ; Mangiarotti, Alessio (Coimbra U.) ; Ketel, Tjeerd J (Vrije U., Amsterdam) ; Ballestrero, Sergio (Johannesburg U.) /CERN NA63 Collaboration
We report the first observation of a shoulder in the radiation spectrum from GeV electrons in a structured target consisting of two thin and closely spaced foils. The position of the shoulder depends on the target spacing and is directly connected to the finite formation length of a low-energy photon emitted by an ultrarelativistic electron. [...]
2012 - Published in : Phys. Rev. Lett. 108 (2012) 071802 APS published version, local copy: PDF;
7.
Distorted Coulomb field of the scattered electron / CERN NA63 Collaboration
Experimental results for the radiation emission from ultrarelativistic electrons in targets of 0.03%–5% radiation length is presented. For the thinnest targets, the radiation emission is in accordance with the Bethe-Heitler formulation of bremsstrahlung, the target acting as a single scatterer. [...]
2010 - Published in : Phys. Rev. D 81 (2010) 052003 APS published version, local copy: PDF;
8.
Restricted energy loss of ultrarelativistic particles in thin targets: A search for deviations from constancy / CERN NA63 Collaboration
Experimental results for the restricted energy loss of ultrarelativistic electrons, with Lorentz factors up to 3x10^5, in a 535@mm thin silicon detector are presented. The combination of high Lorentz factors and thin targets, opens for the possibi lity to study two mutually excluding effects, both based upon theory and on scarce experimental observations. [...]
2010 - Published in : Nucl. Instrum. Methods Phys. Res., B 268 (2010) 1412-1415
9.
Status and plans for 2013, CERN NA63 / Andersen, K K (Department of Physics and Astronomy Aarhus University) ; Uggerhoj, U I (Department of Physics and Astronomy Aarhus University)
We summarize the status and plans for the future for the CERN NA63 collaboration. [...]
CERN-SPSC-2012-027 ; SPSC-SR-105.
- 2012.
Fulltext
10.
Experimental investigations of synchrotron radiation at the onset of the quantum regime / Andersen, K.K. (Aarhus U.) ; Esberg, J. (Aarhus U.) ; Knudsen, H. (Aarhus U.) ; Thomsen, H.D. (Aarhus U.) ; Uggerhoj, U.I. (Aarhus U.) ; Sona, P. (Florence U.) ; Mangiarotti, A. (Coimbra U.) ; Ketel, T.J. (Vrije U., Amsterdam) ; Dizdar, A. (Istanbul U.) ; Ballestrero, S. (Johannesburg U.) /CERN NA63
The classical description of synchrotron radiation fails at large Lorentz factors, $\gamma$, for relativistic electrons crossing strong transverse magnetic fields $B$. In the rest frame of the electron this field is comparable to the so-called critical field $B_0 = 4.414\cdot10^9$ T. [...]
arXiv:1206.6577.- 2012 - 11 p. - Published in : Phys. Rev. D 86 (2012) 072001 APS published version, local copy: PDF; Preprint: PDF; External link: Preprint

CERN Document Server : Pronađeno je 12 zapisa   1 - 10slijedeći  idi na zapis:
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6 Andersen, K
1 Andersen, K E
23 Andersen, K H
9 Andersen, K K
5 Andersen, K K S
2 Andersen, K.
1 Andersen, KK
1 Andersen, Kasper Gnutzmann
3 Andersen, Kasper K S
1 Andersen, Ken
1 Andersen, Ken H
1 Andersen, Kenneth K
2 Andersen, Kent
2 Andersen, Kirsti
1 Andersen, Kristian G
1 Andersen, Kristoffer
2 Andersen, Kristoffer K
1 Andersen, Kristoffer K.
1 Andersen, Kurt
1 Andersen, Kurt Munk
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