Affiliation: Particle Beam Physics Lab (PBPL), Department of Physics and Astronomy, University of California Los Angeles (UCLA)
Time: At 10:30AM，1 June，2016
Place: Multi-functional Hall
Abstract: Recent plasma wakefield accelerator (PWFA) experiments have successfully shown the high-gradient and high efficiency acceleration of either electrons or positrons [1, 2, 3]. A new hybrid scheme of laser-driven under-dense photocathode PWFA to produce electron witness bunches with extreme brightness is reported, which requires precisely spatial alignment and temporal synchronization of the electron and laser pulses in the scale of the wake structure. The latest experiment on the Facility for Advanced Accelerator Experimental Tests (FACET) at SLAC shows the promise of such hybrid acceleration system and their potential as future plasma-based accelerators performance light sources is discussed.
1. Blumenfeld, I. et al. Energy doubling of 42 GeV electrons in a metre-scale plasma wakefield accelerator. Nature 445, 741–744 (2007).
2. Litos, M. et al. High-efficiency acceleration of an electron beam in a plasma wakefield accelerator. Nature 515, 92–95 (2014).
3. Corde S. et al. Multi-giga electron volt acceleration of positrons in a self-loaded plasma wakefield. Nature 524,442–445 (2015)
Biography: Dr. Aihua Deng is currently a postdoc researcher employee in Department of Physics and Astronomy, University of California Los Angeles (UCLA). She got the doctor degree from Shanghai Institute of Optics and Fine Mechanics (SIOM), CAS in 2012. In SIOM, Dr. Aihua Deng was working on experiments of relativistic laser wakefield electron acceleration from discharged capillary and two-staged accelerator as well as the particle-in-cell (PIC) simulations of laser wakefield acceleration (LWFA). In UCLA, Dr. Aihua Deng was leading a project on “high brightness beam generation via Trojan Horse injection in plasma wakefield acceleration (PWFA)”, nominated E210 experiment on FACET user facility at SLAC and is now working on the new lab called “SAMURAI” at UCLA with a TW laser system and an accelerator beam line for physics research and medical applications.