Jitter Studies for a 2.4 GeV Light Source Accelerator Using LiTrack

Technical Report · Fri Mar 19 04:00:00 UTC 2010

DOI:https://doi.org/10.2172/986209· OSTI ID:986209

Penn, Gregory E

Electron beam quality is an important factor in the performance of a free electron laser (FEL). Parameters of particular interest are the electron beam energy, slice emittance and energy spread, peak current, and energy chirp. Jitter in average energy is typically many times the slice energy spread. A seeded FEL is sensitive not only to these local properties but also to factors such as shot-to-shot consistency and the uniformity of the energy and current profiles across the bunch. The timing and bunch length jitter should be controlled to maximize the interval of time over which the electron beam can be reliably seeded by a laser to produce good output in the FEL. LiTrack, a one-dimensional tracking code which includes the effect of longitudinal wakefields, is used to study the sensitivity of the accelerator portion of a 2.4 GeV FEL to sources of variability such as the radio frequency (RF) cavities, chicanes, and the timing and efficiency of electron production at the photocathode. The main contributors to jitter in the resulting electron beam are identified and quantified for various figures of merit.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: Accelerator& Fusion Research Division
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 986209
• Report Number(s): LBNL-3768E
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
CAVITIES
EFFICIENCY
ELECTRON BEAMS
ELECTRONS
FEL
accelerator
electron beam
FREE ELECTRON LASERS
LASERS
LIGHT SOURCES
PERFORMANCE
PRODUCTION
SENSITIVITY