Speaker
Dr
Oleg Bogdanov
(TSU&TPU)
Description
The concept of channeling in a Half-Wave Crystal (HWC) was proposed in [1-3] for a proton beam. In our previous works [4,5], the processes of scattering and radiation of relativistic electrons channeled in a Si HWC according the beam parameters of the SAGA LS accelerator (Japan) were studied in detail.
It is known, that the radiation from channeled electrons in a straight crystal has a linear polarization [6]. A distinctive feature of electrons motion under channeling in a HWC is that the part of electrons moves along arc-shaped trajectories. It can be expected that in this case the channeling radiation from HWC- channeled electrons will have interesting polarization properties.
In this study, we present the numerical calculations of the polarization features ( namely, the Stokes parameters) of radiation from 255 MeV electrons channeled in a HWC Si crystal. Every trajectory is simulated using BCM-2.0 code [7], and the averaging over electrons trajectories is performed. In contrary to ordinary planar channeling radiation, there appears some circular polarization, the degree of which is estimated.
References
1. Tsyganov E. N., Taratin A. Nucl. Instr. and Meth A 363 (1995), 511.
2. Guidi V., Mazzolari A., De Salvador D., Bacci L. Phys. Rev. Lett. 108 (2012) 014801.
3. Scandale W., Arduini G., Butcher M. et al Phys. Lett. B 734 (2014) 1.
4. Takabayashi Y., Pivovarov Yu.L., Tukhfatullin T.A. Phys. Lett. B 751 (2015) 453.
5. Takabayashi Y., Bagrov V. G., Bogdanov O. V., Pivovarov Yu. L., Tukhfatullin T. A. Nucl. Instrum. Methods B 355 (2015) 188.
6. Baier V. N., Katkov V. M., Strakhovenko V. M. 1998 Electromagnetic Processes at High Energies in Oriented Single Crystals (Singapoure: World Scientific Publishing)
7. Abdrashitov S. V. , Bogdanov O. V. , Korotchenko K. B. , Pivovarov Y. L. , Rozhkova E. I. , Tukhfatullin T. A. , Eykhorn Y. L. BCM-2.0 – The new version of computer code “Basic Channeling with Mathematica©” // Nuclear Instruments and Methods in Physics Research B. - 2017 - Vol. 402. - p. 106
Primary author
Dr
Oleg Bogdanov
(TSU&TPU)
Co-authors
Dr
Timur Tukhfatullin
(National Research Tomsk Polytechnic University)
Prof.
Yury Pivovarov
(National Research Tomsk Polytechnic University)
