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CERN Document Server 11 záznamov nájdených  1 - 10ďalší  skoč na záznam: Hľadanie trvalo 0.64 sekúnd. 
1.
Measurements and theories of the King–Perkins–Chudakov effect / Thomsen, H D (Aarhus U., ISA) ; Uggerhøj, U I (Aarhus U.)
We discuss the available experimental results, based on cosmic rays as well as laboratory measurements, for the King–Perkins–Chudakov (KPC) effect where pairs – when detected close to the creation vertex – suffer a reduced energy loss due to the internal screening of the charges constituting the pair. It is shown that the overall best description of data is obtained from the original theoretical expression by Chudakov based on classical electrodynamics, or the semi-classical extension by Burkhardt. [...]
2011 - 6 p. - Published in : Nucl. Instrum. Methods Phys. Res., B 269 (2011) 1919-1924
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2.
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
Úplný záznam - Podobné záznamy
3.
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;
Úplný záznam - Podobné záznamy
4.
End to End Beam Dynamics of the ESS Linac / Eshraqi, M (ESS, Lund) ; Bustinduy, I (ESS, Bilbao) ; Celona, L (INFN, LNS) ; Comunian, M (INFN, Legnaro) ; Danared, H (ESS, Lund) ; Holm, A S (Aarhus U.) ; Møller, S P (Aarhus U.) ; Ponton, A (ESS, Lund) ; Stovall, J (CERN ; Rutherford) ; Thomsen, H D (Aarhus U.)
The European Spallation Source, ESS, uses a linear accelerator to deliver the high intensity proton beam to the target station. The nominal beam power is 5 MW at an energy of 2.5 GeV. [...]
2012 - 3 p. - Published in : Conf. Proc.: C1205201 (2012) , pp. THPPP085
External link: Published from JaCoW
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.3933-3935
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5.
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;
Úplný záznam - Podobné záznamy
6.
Experimental investigation of strong field trident production / CERN NA63 Collaboration
We show by experiment that an electron impinging on an electric field that is of critical magnitude in its rest frame, may produce an electron-positron pair. Our measurements address higher-order QED, using the strong electric fields obtainable along particular crystallographic directions in single crystals. [...]
2010 - Published in : Phys. Rev. D 82 (2010) 072002 APS published version, local copy: PDF;
Úplný záznam - Podobné záznamy
7.
On the macroscopic formation length for GeV photons / CERN NA63 Collaboration
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. [...]
2009 - Published in : Phys. Lett. B 672 (2009) 323-327
Úplný záznam - Podobné záznamy
8.
Direct measurement of the Chudakov effect / CERN NA63 Collaboration
Experimental results for the restricted energy loss of pairs created from 1–178 GeV photons in a thin Au target and subsequently passing a CCD detector are presented. It is shown that pairs—when detected close to the creation vertex—suffer a reduced energy loss due to the internal screening of the charges constituting the pair. [...]
2008 - Published in : Phys. Rev. Lett. 100 (2008) 164802 APS Published version, local copy: PDF;
Úplný záznam - Podobné záznamy
9.
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
Úplný záznam - Podobné záznamy
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
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CERN Document Server : 11 záznamov nájdených   1 - 10ďalší  skoč na záznam:
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