Speaker
Description
Laser plasma accelerator (LPA) electron beams need to be controllably transported and focused for applications requiring coupling of high-brightness charge beams into small apertured structures, such as free-electron lasers (FEL) or high-gradient wakefield structures. A critical challenge faced by LPAs is the intrinsic shot-to-shot fluctuations in generated electron beam pointing, transverse position, and emittance, and coupling the energy-spread beams into a chromatic transport line. The BELLA Center’s HTU beamline supports variable LPA injection mechanisms and boasts an advanced beam transport system capable of precision energy filtering and controlled electron delivery to a high-brightness focus. Here we present a study of electron beam stability at a downstream focus using variable electron energy filtering and two injection mechanisms: ionization injection and shock-induced down-ramp injection. Furthermore, we discuss a scheme for precision coupling of LPA beams into small aperture structures.
Acknowledgments
This work was supported by the U.S. Department of Energy (DOE), Office of High Energy Physics, and Laboratory Directed Research and Development Program of Lawrence Berkeley National Laboratory, under Contract No. DE-AC02-05CH11231.
K. Jensen is currently supported by an SCGSR fellowship award conducted at the BELLA Center at Lawrence Berkeley National Laboratory and supported by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR) program. The SCGSR program is administered by the Oak Ridge Institute for Science and Education (ORISE) for the DOE. ORISE is managed by ORAU under contract number DE‐SC0014664. All opinions expressed in this paper are the author’s and do not necessarily reflect the policies and views of DOE, ORAU, or ORISE.
