Speaker
Dr
Vladimir Ganenko
(National Scientific Center "Kharkov Institute of Physics&Technology", Kharkov, Ukraine)
Description
Coherent bremsstrahlung (CB) linearly polarized photon beam has been produced at the MAX-lab facility at interaction of electron beam with energy E0=192.7 MeV with diamond crystals 0.1 mm [1].
Since then the CB characteristics of the A-type were studied for diamond crystal 0.1 mm and more thin crystal 0.5 mm thick, as well, for orientations when main contribution to the CB cross section gave both one and many points of the reciprocal lattice of the crystal and various photon beam collimation was applied. A beam polarization ~25% was obtained at the CB peak energy ~50 MeV without any beam collimation. The polarization was increased up to ~45-50% when strong beam collimation (c~0.5) was applied. (=mc2/E0, m is the electron mass, E0 is the electron energy).
The spectra of the CB of B-type were also measured for axial orientation of the diamond crystal when the electrons move near the crystal axes. An enhancement was observed nearby the end of the photon spectrum. The results obtained are compared with theoretical calculation based on semi-classical model developed by the Kharkov’s group [2].
References
1. K. Fissum, J. Brudvik, D. Burdeinyi, V. Ganenko, K. Hansen, L. Isaksson, K. Livingston, M. Lundin, V. Morokhovskyi, B. Nilsson, B. Schröder, G. Vashchenko, The Coherent Bremsstrahlung Beam at MAX-lab Facility "Charged and Neutral Particles Channeling Phenomena - Channeling 2008", Proceedings of the 51st Workshop of the INFN Eloisatron Project, S.B. Dabagov and L. Palumbo, Eds., World Scientific, 2010 (The Science and Culture series - Physics, Series Ed. A. Zichichi), p. 49.
2. N.F. Shul’ga, V.I. Truten’, A.A. Greenenko, Nual.Instr.Meth. B145 (1988)
Primary author
Dr
Vladimir Ganenko
(National Scientific Center "Kharkov Institute of Physics&Technology", Kharkov, Ukraine)
Co-authors
Bent Schröder
(Department of Physics, Lund University, SE-221 00 Lund, Sweden)
Bjorn Nilsson
(MAX-lab, Lund University, SE-221 00 Lund, Sweden)
Dmytro Burdeinyi
(National Scientific Center “Kharkov Institute of Physics & Technology”, 61108 Kharkov, Ukraine)
Jason Brudvik
(MAX-lab, Lund University, SE-221 00 Lund, Sweden)
Ken Livingston
(Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, UK)
Kevin Fissum
(Department of Physics, Lund University, SE-221 00 Lund, Sweden)
Kurt Hansen
(MAX-lab, Lund University, SE-221 00 Lund, Sweden)
Lennart Isaksson
(Department of Physics, Lund University, SE-221 00 Lund, Sweden)
Magnus Lundin
(MAX-lab, Lund University, SE-221 00 Lund, Sweden)
Nicolai Shul’ga
(National Scientific Center “Kharkov Institute of Physics & Technology”, 61108 Kharkov, Ukraine)
Valentin Truten’
(National Scientific Center “Kharkov Institute of Physics & Technology”, 61108 Kharkov, Ukraine)
