Time: Wednesday, Nov. 13, 2:00 pm
Venue: Rm. 413, Bld. 11#, Yuquan Campus
Speaker 1: Xiaochuan Ning
Title: Propagation of an ion beam in plasma
Abstract:
Ion beams now have a lot of important applications in many fields, such as inertial confinement fusion(ICF), particle colliders, therapy. However, due to the strong Coulomb repulsion of the particle beam, it is difficult to transmit over a long distances in vacuum. Using plasma is a good way to restrain Coulomb expansion, but this also leads to another problem, energy loss(stopping power). In many cases, it is necessary to reduce stopping power(like transmission). Therefore, a further study on stopping power is quite needed.
Speaker 2: Obaydur Rahman
Title: Heavy ion acceleration using double-laser pulses plasma interactions
Abstract:
A double-laser pulses scheme is used to generate a high-quality GeV carbon (C6+) ion beam from a μm thick carbon layer target using 2D-PIC simulations. It is observed that the second pulse not only boost the maximum energy but also increase the total charge the of C6+ ion beam. A quasi-monoenergetic C6+ ion beam of about 2 GeV maximum energy can be obtained, which is more than a factor of two higher than a single-laser pulse (SLP) case. In addition, the total charge of the accelerated C6+ ions is also found to 53 times higher as compared to the SPL case. The influences of the time intervals and the laser energies on the C6+ ion acceleration are also studied.
Speaker 3: Niaz Wali khattak
Title: Density profile measurement using Langmuir probe diagnostics on ZPED