Title: Enhancement of Proton acceleration & CE using intense DLP scheme
Abstract: We report an efficient scheme to improve the proton acceleration and energy conversion efficiency from the laser to proton beam by using double laser pulses foil interaction. We found a significant increase of the peak energy, the total number, and the maximum energy of the accelerated protons for the double laser pulses foil interaction over that of single laser pulse foil interaction. The proton acceleration proceeds in three distinct stages. First, the pre-pulse accelerates the foil electrons and generate a weak electric field, which accelerates the foil protons due to TNSA, and reduces the reflection of succeeding laser pulse so that the more energy of the second laser pulse is converted into the particle energy. Second, the main pulse preferentially accelerates the slower protons located deeper in the plasma as well as it also accelerates the fast protons due to an enhanced TNSA. Finally, the protons are further accelerated due to the laser break-out afterburner, when the target becomes relativistically transparent to the laser pulse.
Speaker2: Ning Xiaochuan(宁小川)
Title: A simple introduction of a charged particle beam propagating in vacuum and plasma
Abstract: Since the 1970s, great progress has been made in the study of intense charged particle beams(ICPB). ICPB now have a lot of important applications in many fields, such as inertial confinement fusion(ICF), particle colliders. However, due to the strong Coulomb repulsion of the particle beam, it is difficult to transmit over a long distances in vacuum. Therefore, how to improve the propagation of ICPB has become a hot topic today.