Achromatic and isochronous electron beam transport for tunable free electron lasers

Conference · Sun Sep 01 00:00:00 EDT 1991

DOI:https://doi.org/10.1016/0168-9002(92)91078-N· OSTI ID:6110780

Bengtsson, J; Kim, K J

We have continued the study of a suitable electron beam transport line, which is both isochronous and achromatic, for the free electron laser being designed at Lawrence Berkeley Laboratory. A refined version of the beam transport optics is discussed that accommodates two different modes of FEL wavelength tuning. For the fine tuning involving a small change of the electron beam energy, sextupoles are added to cancel the leading nonlinear dispersion. For the main tuning involving the change of the undulator gap, a practical solution of maintaining the beam matching condition is presented. Calculation of the higher order aberrations is facilitated by a newly developed code. 11 refs., 4 figs., 3 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6110780
• Report Number(s): LBL-30674; ESG--133; CONF-9108118--34; ON: DE92003908
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
BEAM DYNAMICS
BEAM OPTICS
BEAM TRANSPORT
BEAMS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELECTRON BEAMS
EQUIPMENT
FREE ELECTRON LASERS
LASERS
LEPTON BEAMS
MAGNETS
NONLINEAR PROBLEMS
PARTICLE BEAMS
WIGGLER MAGNETS