Test and Commissioning of the Third Harmonic RF System for FLASH.

  title={Test and Commissioning of the Third Harmonic RF System for FLASH.},
  author={Eckhard Vogel and Christa Albrecht and N.Baboi and Christian Behrens and Thomas Delfs and T. Huw Edwards and Juergen Eschke and Ch. Gerth and Elvin R. Harms and Andy Hocker and Martin W. G. Hoffmann and Markus Huening and Renato Jonas and Justin Kahl and Denis Kostin and Gast{\'o}n Kreps and Michael Kuhn and F. Ludwig and Wolfgang Maschmann and Cai M{\"u}ller and Peter Nommensen and Jens Rothenburg and Holger Schlarb and Claudia Schmidt and Jacek Sekutowicz},
Ultra short bunches with high peak current are required for efficient creation of high brilliance coherent light at the free electron laser FLASH. They are obtained by a two stage transverse magnetic chicane bunch compression scheme based on acceleration of the beam off the rf field crest. The deviation of the rf field’s sine shape from a straight line leads to long bunch tails and reduces the peak current. This effect will be eliminated by adding the Fermilab-built third harmonic… CONTINUE READING


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