Speaker
Prof.
Igor Vnukov
(Belgorod National Research University, 14 Studencheskaya str., 308007 Belgorod, Russia)
Description
The authors of the papers [1,2] proposed to measure the transverse size of an electron beam using the PXR spatial distribution at short distances between a crystalline target and a detector. The experiment described in Ref. [3] was performed with the 855 MeV electron beam of the MAMI-B microtron and a 50 μm thick silicon crystal (100) acting as target, which was oriented under a Bragg angle of 11.25 deg. PXR with energies hω(220) = 16.55 keV and hω(400) = 23.40 keV was detected using an X-ray camera (ProxiVision HR-25) with spatial resolution of about 30 μm [4]. The obtained results confirmed the possibility to utilize such measurements for electron beam size estimation. However, the results of this experiment are not well described by the kinematic PXR theory.
The detailed data treatment of the experiment [3], taking into account the contribution of both diffracted transition radiation and bremsstrahlung, is presented in this report. The X-ray camera efficiency was additionally taken into account. The simulated PXR pattern as a whole agrees with the experimental one. However, along the Bragg direction where the influence of the beam size on the PXR spatial distribution is most noticeable, a discrepancy between the model and the experiment is observed. Possible reasons of such discrepancy will be discussed.
References
1. A. Gogolev, A. Potylitsyn, G. Kube // J. Phys. Conference Series, 2011. – V. 357, – 012018.
2. Y. Takabayashi // Phys. Lett. A 376 (2012) 2408.
3. G. Kube. et al. // Proceedings of IPAC2013, Shanghai, China, P. 491 http://accelconf.web.cern.ch/accelconf/IPAC2013/papers/mopme011.pdf
4. http://www.proxivision.de/datasheets/X-Ray-Camera-HR25-x-ray-PR-0055E-03.pdf
Primary author
Prof.
Igor Vnukov
(Belgorod National Research University, 14 Studencheskaya str., 308007 Belgorod, Russia)
Co-authors
Dr
Aleksey Gogolev
(Tomsk Polytechnic University, 30 Lenin av., 634050 Tomsk, Russia)
Prof.
Alexander Potylitsyn
(Tomsk Polytechnic University, 30 Lenin av., 634050 Tomsk, Russia)
Mr
C. Behrens
(DESY, 85 Notkestraße, 22607 Hamburg, Germany)
Prof.
Gero Kube
(DESY, 85 Notkestraße, 22607 Hamburg, Germany)
Mr
Mikhail Sidnin
(Belgorod National Research University, 14 Studencheskaya str., 308007 Belgorod, Russia)
Prof.
Werner Lauth
(Institut für Kernphysik, 45 Johann-Joachim-Becher-Weg, 55128 Mainz, Germany)
Mr
Yurii Goponov
(Belgorod National Research University, 14 Studencheskaya str., 308007 Belgorod, Russia)
