Space-Charge Limitation of a Femtosecond Photoinjector

Longitudinal Bunch Lengthening Compensation in a High Charge Rf Photoinjector

In high charge RF photoinjectors for wakefield two beam acceleration studies, due to the strong longitudinal space charge, bunch lengthening between the photocathode and photoinjector exit is a critical issue. We present beam dynamics studies of bunch lengthening in an RF photoinjector for a high charge electron beam and describe methods to compensate the bunch lengthening to various degrees. I...

Femtosecond Thermionic Emission in the Space-Charge Limited Regime

Charge and Wavelength Scaling of RF Photoinjector Designs

The optimum design of an emittance compensated rf photoinjector is very complicated and time-consuming, relying heavily on multi-particle simulations without good analytical models as a guide. Emittance compensated designs which have been developed, however, can be used to generate other designs with no additional effort if the original design is scaled correctly. This paper examines the scalin...

Observation and simulation of space-charge effects in a radio-frequency photoinjector using a transverse multibeamlet distribution

M. Rihaoui, P. Piot, J. G. Power, Z. Yusof, and W. Gai Northern Illinois Center for Accelerator & Detector Development and Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA Accelerator Physics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA (Received...

Measurement and Simulation of Space Charge Effects in a Multi-beam Eletron Bunch from an Rf Photoinjector

We report on a new experimental study of the space charge effect in a space-charge-dominated multi-beam electron bunch. A 5 MeV electron bunch, consisting of a variable number of beamlets separated transversely, was generated in a photoinjector and propagated in a drift space. The collective interaction of these beamlets was studied for different experimental conditions. The experiment allowed ...