Design overview of a highly stable infrared free electron laser at LBL

Conference · Thu Nov 01 00:00:00 EST 1990

OSTI ID:6185762

Kim, K J; Berz, M; Chattopadhyay, S; Gough, R; Kim, C; Kung, A H; Xie, M ^[1]; Edighoffer, J ^[2]; Stein, W ^[3]

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1. Lawrence Berkeley Lab., CA (USA)
2. Pulse Sciences, Inc., San Leandro, CA (USA)
3. Industrial Radiation, Inc., Los Alamos, NM (USA)

An infrared free electron laser (IRFEL) is being designed for the Chemical Dynamics Research Laboratory (CDRL) at LBL. The FEL is based on a 50 MeV RF linac operating in synchronization to the Advanced Light Source (ALS), and will produce intense (100 {mu}J per micropulse), narrow bandwidth (narrower than 0.1%) radiation between 3 {mu} and 50 {mu}. In the design, we pay particular attention to the FEL stability issues and require that the fluctuations in electron beam energy and in timing be less then 0.05% and 0.1 ps respectively. The FEL spectrum can then be stabilized to about 10{sup {minus}3}, or if grating is used, to 10{sup {minus}4}. We discuss various sources of fluctuations in the gun, the bunchers and the accelerator sections, as well as the feedback and feedforward schemes to reduce these fluctuations. The accelerator structure is chosen to be of the side coupled, standing wave type for easier control. The beam transport is made isochronous to avoid the coupling between the energy and the timing fluctuations. 12 refs., 1 fig.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6185762
• Report Number(s): LBL-29957; CONF-9009166-20; ESG-112; ON: DE91009327; TRN: 91-008182
• Resource Relation: Conference: 12. international free electron laser conference (FEL-12), Paris (France), 17-21 Sep 1990
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
42 ENGINEERING
FREE ELECTRON LASERS
DESIGN
BEAM BUNCHERS
BEAM TRANSPORT
INFRARED RADIATION
LINEAR ACCELERATORS
OPTICAL SYSTEMS
PERFORMANCE
STABILITY
WIGGLER MAGNETS
ACCELERATORS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTROMAGNETS
EQUIPMENT
LASERS
MAGNETS
RADIATIONS
430100* - Particle Accelerators- Design
Development
& Operation
426002 - Engineering- Lasers & Masers- (1990-)