| Paper |
Title |
Page |
| WEPCH006 |
Comparison between Simulations and Measurements of Low Charge Electron Bunch in the ELSA Facility
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1927 |
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- J.-L. Lemaire, A.B. Binet, A.B. Bloquet, D. Guilhem, V. Le Flanchec, S. Pichon
CEA, Bruyeres-le-Chatel
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Dedicated focal spot size measurements carried out at the ELSA electron linear accelerator facility have provided detailed data which are suitable for benchmarking of different simulation codes for high charge bunch beam acceleration issued from an RF photo-injector source. We present some characteristic features of bunched electron beam propagation from beam formation at the photo-cathode to acceleration through RF cavities until the final focussing on a target, by using numerical simulations obtained with MAGIC, PARMELA, MAFIA, PARTRAN tool box codes. The challenges for the planned benchmarking are discussed.
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| THPCH158 |
A Phased-locked S.A.M. Mode-locked Laser for the ELSA Photoinjector
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3164 |
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- V. Le Flanchec, P. Balleyguier
CEA, Bruyères-le-Châtel
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A new laser oscillator has been developed for the ELSA photoinjector. It is a fibered-diode-pumped mode-locked Nd:YVO4 laser, with a completely passive cooling design. Mode-locking is achieved by a saturable absorber mirror. Such a passive laser oscillator must be synchronized with the ELSA electron bunches. A phased-locked loop has been developed for that purpose. We present the main design aspects resulting from the high stability requirement of ELSA. The first electron spectra measurements show the high level of energy stability achieved. We also present improvements in the laser injection system leading to a higher transverse stability, a more uniform cathode illumination, and a better transmission of the whole system.
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