Skip to main content
Open Access Publications from the University of California

Enhancement of Laser Injection Methods by Plasma Density Gradients


Plasma density down-ramps are proposed as a method for improving the performance of laser injection schemes. A decrease in density implies an increase in plasma wavelength, which can shift a relativistic electron from the defocusing to the focusing region of the accelerating wakefield. Also, a decrease in density leads to a decrease in wake phase velocity, which lowers the trappingthreshold. The specific method of two-pulse colliding pulse injector was examined using a 3D test particle tracking code. A density down-ramp of 30% led to an order of magnitude enhancement of the trapping fraction compared to the uniform plasma case, without degrading other bunch properties.

Main Content
For improved accessibility of PDF content, download the file to your device.
Current View