Space charge effects in the injector and driver accelerator for a UV FEL at CEBAF

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.51093· OSTI ID:383705

Liu, H; Neuffer, D ^[1]

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1. CEBAF, 12000 Jefferson Ave., Newport News, Virginia 23606 (United States)

A high-intensity CW photocathode electron injector test stand has been designed and is being built for a 200 MeV two-pass recirculating CW superconducting accelerator. The accelerator is being designed to drive a high average power (1 kW) UV free-electron laser (FEL). This FEL requires beam emittances as small as 11 mm mrad for the transverse normalized rms emittance and 30 deg-keV for the longitudinal rms emittance. The electrons contained in a 135 pC charged bunch are compressed from an initial bunch length of 90 ps (6{sigma}) at the photocathode down to 1.2 ps (a factor of 75 compression) at the wiggler. In this paper, we present our studies on the space charge effects that determine the magnitude of beam emittance growth during the various stages of beam transport from the injector through the driver accelerator to the wiggler. {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Thomas Jefferson National Accelerator Facility
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 383705
• Report Number(s): CONF-9510361--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 377; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM BUNCHING
BEAM EMITTANCE
CEBAF ACCELERATOR
DESIGN
FREE ELECTRON LASERS
MEV RANGE 100-1000
SPACE CHARGE