Overview of Photoinjectors

Journal Article · Thu Nov 04 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3520316· OSTI ID:21428773

Power, J G ^[1]

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1. High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States)

High-brightness electron beam sources play a crucial role in many advanced acceleration schemes as well as linac-based light sources such as Energy Recovery Linac (ERL) based light sources and FELs. Three varieties electron sources (photo, thermionic, and field emission) the photoinjector is especially attractive due to its innate ability to control the time structure of intense electron bunches with low transverse and longitudinal emittance. In all cases, the quality of the bunch begins with the intrinsic emittance and time response of the photocathode, and we discuss the trade-offs involved between the various material choices. A variety of longitudinal laser pulse-shaping techniques are currently being developed to linearize space charge forces or create trains of ultra-short bunches. The emittance compensation technique mitigates the growth of the projected emittance due to the linear space charge force while the bunch is accelerated and compressed in an injector. While the normal conducting rf photoinjector is the workhorse of this field, the dc photoinjector is being pushed to its high-voltage limits, and the year 2010 promises to be a critical year for the superconducting rf photoinjector. Parallel to the development of the hardware, rapid progress has also been made with modeling codes, theory, and bench marking of diagnostics. We attempt to give both a tutorial of photoinjectors and a review of the current state of the art in this rapidly developing field.

• OSTI ID: 21428773
• Journal Information: AIP Conference Proceedings, Vol. 1299, Issue 1; Conference: 14. advanced accelerator concepts workshop, Annapolis, MD (United States), 13-19 Jun 2010; Other Information: DOI: 10.1063/1.3520316; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATION
BEAM BUNCHING
BEAM EMITTANCE
BEAM PRODUCTION
COMPUTERIZED SIMULATION
ELECTRON BEAMS
ELECTRON SOURCES
FIELD EMISSION
FREE ELECTRON LASERS
LIGHT SOURCES
LINEAR ACCELERATORS
PHOTOCATHODES
SPACE CHARGE
WORK FUNCTIONS
ACCELERATORS
BEAM DYNAMICS
BEAMS
CATHODES
DYNAMICS
ELECTRODES
EMISSION
FUNCTIONS
LASERS
LEPTON BEAMS
MECHANICS
PARTICLE BEAMS
PARTICLE SOURCES
RADIATION SOURCES
SIMULATION