This project explores the formation, acceleration, and manipulations of electron beams with significant canonical angular momentum (CAM) often referred to as CAM-dominated or "magnetized" beams. Such beams are foreseen to be used as "cooling" beams in high-energy electron cooling for future electron-ion colliders. Likewise, the manipulation of CAM-dominated beams enables the generation of "flat" beams, i.-e., with large transverse emittance ratio. These flat beams are expected to benefit other applications including advanced linear-collider concepts, beam-driven wakefield accelerators using asymmetric structure or plasma channel, and novel accelerator-based light sources.

In its present phase (FY19-20), the project focuses on the formation of high-charge magnetized beams with parameters consistent with requirements associated with the JLEIC project at Jefferson Lab. The project also investigates the transport (manipulation in focusing system, acceleration), halo formation, and possible beam-degradation in a new merger concept. This research is performed in collaboration with Jefferson Lab.

The project also leverages on past research (FY17-18) on flat beam generation at the FAST-IOTA injector and earlier at the A0 photoinjector.

The original objectives are detailed in [[]] and consist of three thrusts:
  1. The generation and characterization of 3.2-nC magnetized electron bunch
  2. The transport and halo formation in magnetized beams
  3. The investigation of a straight merger concept


  • Stephen Benson, Thomas Jefferson National Laboratory
  • Aaron Fetterman, Northern Illinois University (graduate student)
  • Joseph Gubeli, Thomas Jefferson National Laboratory
  • Christopher Marshall, Northern Illinois University (graduate student)
  • Philippe Piot, FermiLab & Northern Illinois University (PI)
  • Jinhao Ruan, Fermilab