Behavior of the positron beam of the Super-ACO storage ring in response to a modification of the RF frequency for free-electron laser experiments

Journal Article · Tue Mar 01 04:00:00 EST 1994 · IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/3.286169· OSTI ID:6957668

Couprie, M E ^[1]; Billardon, M ^[2]

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1. Univ. de Paris-Sud, Orsay (France) CEN-Saclay, Gif-sur-Yvette (France)
2. Univ. de Paris-Sud, Orsay (France) ESPCI, Paris (France)

The macrotemporal structure of the Super-ACO Storage ring free-electron laser (FEL) can be either continuous, pulsed, or chaotic, and can present some rapid fluctuations. The temporal evolution of a storage ring FEL involves both the longitudinal motion of the positron beam (especially the synchrotron oscillations) and the FEL dynamics, as in a coupled system. Studies on the dynamics of the positron beam are performed here, in the goal to have a stable source for FEL applications, and to determine the conditions for a stable Q-switching experiment. The employed method is to study the influence of a controlled change of the radio frequency (RF) (modulation or frequency jump) on the beam. A simple theoretical model taking into account the perturbed RF system is presented to help the understanding of the experimental data. The different methods of measurement are described. Then, the results are given for several experimental conditions and the influence of different possible adjustments (synchrotron feedback, RF loop ...) is presented. Consequences are derived for the FEL.

• OSTI ID: 6957668
• Journal Information: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States) Vol. 30:3; ISSN 0018-9197; ISSN IEJQA7
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002 -- Engineering-- Lasers & Masers-- (1990-)
43 PARTICLE ACCELERATORS
430200 -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
430400* -- Particle Accelerators-- Storage Rings
ACO
BEAM DYNAMICS
BEAMS
DATA
EXPERIMENTAL DATA
FREE ELECTRON LASERS
INFORMATION
LASERS
LEPTON BEAMS
MATHEMATICAL MODELS
NUMERICAL DATA
OPERATION
PARTICLE BEAMS
POSITRON BEAMS
STORAGE RINGS