Speaker
Description
We have developed a new segmented capillary gas cell for laser wakefield acceleration (LWFA) and plasma lenses. This capillary enables the tailoring of longitudinal density profiles in gases or plasmas, with a transverse guiding structure when discharged with high-voltage pulses. For instance, a down-gradient density profile can be used for controlled injection in LWFA. We tested this segmented capillary gas cell using a 150 TW laser system at IBS in GIST, which resulted in a reduced energy spread of the electron beam. We also measured the longitudinal plasma density profile of the discharged capillary plasma density using the Stark broadening of hydrogen gas. This novel capillary has potential applications in LWFA, PWFA, and plasma lenses with a controllable density profile. In this presentation, we will discuss the development of the segmented capillary, recent experimental results from LWFA, and its future applications.
