Speaker
Description
A segmented capillary gas-cell was developed to control the injection and acceleration for laser wakefield acceleration (LWFA).The design consists of multiple capillary blocks with engineered apertures fed by independent gas lines, creating controlled longitudinal density gradients. The central block features a reduced orifice diameter, establishing a down-gradient pressure profile that forms corresponding plasma density variations upon ionization. Stark broadening measurements of hydrogen emission confirmed the desired density profile Stark broadening measurements of hydrogen emission confirmed the desired density profile formation by discharged capillary gas-cell. LWFA experiments using a 150 TW laser system produced 300 MeV electron beams with improved energy spread and reduced shot-to-shot fluctuations compared to uniform capillaries. This segmented approach demonstrates significant potential for advancing plasma-based acceleration technologies through precise density control.
