Efficient forward direct laser acceleration of electrons in subcritical plasma with injection through hybrid parametric instability
Efficient forward electron acceleration by the direct laser acceleration (DLA) in the plasma channel was experimentally demonstrated using a 16 µm thick tape target. An electron beam with ∼0.05 rad divergence, 50-100 pC charge (for E<1.7 MeV), and temperature ∼ several MeV was observed on 1 TW laser system utilizing an additional controlled nanosecond prepulse. Using this beam, several near-threshold photonuclear reactions were studied and neutron flux of ∼ 105 − 106 s-1 J-1 was achieved. We also used neutron flux measurements to estimate electron beam charge, calculating conversion coefficients from GEANT4 simulations. Terahertz radiation emission from this type of interaction was also studied, exhibiting a two-maxima structure with the change of delay between main pulse and nanosecond prepulse.
M. V. Lomonosov Moscow State Univ. (Russian Federation), Institute of Nuclear Research (Russian Federation)
Gorlova D. is currently a 1st year Ph.D. student in Laboratory of Relativistic Laser Plasma, Physics Faculty, Lomonosov Moscow State University. She prevouisly graduated from that university with BS (2018) and MS (2020) in Physics, both with Honours. Since 2016 she is also working as an assistant in Photonuclear Laboratory of the Institute for Nuclear Research of RAS. Member of SPIE Student Chapter in MSU and Vice-president of the chapter (September 2018-Septemper 2020) and President of the chapter (September 2020 - currently).