Speaker
Description
See the full abstract here:
http://ocs.ciemat.es/EPS2019ABS/pdf/P1.2020.pdf
The all-optical Compton backscattering setup by using laser pulses becomes a promising method in building a compact gamma-ray source [1]. Nevertheless, this method only produces a single gamma-ray flash and other sources are suppressed. In this work, we study the feasibility of producing double gamma-rays flashes by using one 1 PW laser pulse. This method utilises the alloptical setup with a structured solid target as a reflecting foil. The laser pulse is reflected by this foil after propagating a few millimetres into the underdense plasma. The reflected laser intensity is boosted strong enough to invoke radiation reaction as nonlinear Compton backscattering. After that, the electron bunch passes the foil for bremsstrahlung. Our simulation result shows that a collimated -ray beam from the nonlinear Compton backscattering (NCBS) with peak brilliance of 6.7 x 10^20 photons/s/mm^2/mrad^2/0 1%BW at 15 MeV is obtained. At the same energy, bremsstrahlung process provided another collimated gamma-ray beam with 2.1 x 10^16 photons/s/mm^2/mrad^2/0 1%BW. The double gamma-rays beams can find application for the pump-probe experiment down to the nuclear structure [2].
References
[1] K. Ta Phuoc, S. Corde, C. Thaury, V. Malka, A. Tafzi, J. P. Goddet, R. C. Shah, S. Sebban and A. Rousse, Nature Photonics 6, 308 (2012).
[2] J. F. Ong, A. C. Berceanu, K. Seto, S. Aogaki and L. Neagu, submitted
