Photocathode Laser for the Superconducting Photo Injector at the Forschungszentrum Rossendorf


Photocathode Laser for the Superconducting Photo Injector at the Forschungszentrum Rossendorf

Will, I.; Klemz, G.; Teichert, J.; Staufenbiel, F.

We report on the design of the photocathode laser for a superconducting RF gun, which is presently under development at the Forschungszentrum (FZ) Rossendorf. This laser is foreseen to drive the RF gun in CW mode with up to 1 nC bunch charge. It generates pulses of 12...14 ps duration with 500 kHz repetition rate and 0.8 μJ pulse energy at 263 nm wavelength. This should provide sufficient pulse energy for generation of bunches with 1 nC charge using caesium telluride photocathodes. Due to two active modelockers in the laser oscillator, the latter operates in tight synchronism to the RF master oscillator of the linac. The laser consists of a short-pulse oscillator, a pulse picking Pockels cell, a regenerative amplifier and a wavelength conversion unit. The latter converts the infrared laser radiation to the ultra-violet (UV). This unit turns out to be a particularly critical element of such a photocathode laser driving a RF gun in CW mode.

  • Contribution to proceedings
    28th International Free Elektron Laser Conference FEL 2006, 27.08.-01.09.2006, Berlin, Germany
    Proceedings of FEL 2006, BESSY, 978-3-9809534-3-6, 564-566
  • Poster
    28th International Free Electron Laser Conference FEL 2006, 27.08.-01.09.2006, Berlin, Germany

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Publ.-Id: 9372