Wuppertal 2015 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 4: FEL, Seeding and Thomson Scattering

AKBP 4.6: Talk

Monday, March 9, 2015, 18:00–18:15, F.10.01 (HS 4)

Ultrashort VUV Synchrotron Radiation Pulses for Pump-Probe Experiments at DELTA — •Arne Meyer auf der Heide, Fin Hendrik Bahnsen, Max Bolsinger, Svenja Hilbrich, Markus Höner, Holger Huck, Maryam Huck, Shaukat Khan, Carsten Mai, Robert Molo, Helge Rast, Gholamreza Shayeganrad, and Peter Ungelenk — Center for Synchrotron Radiation (DELTA), TU Dortmund University, Dortmund, Germany

Since 2011, the coherent harmonic generation (CHG) principle is employed to produce ultrashort VUV pulses at the short-pulse facility of the 1.5-GeV synchrotron light source DELTA operated by the TU Dortmund University. CHG is based on the interaction of ultrashort laser pulses with electrons in an undulator to generate coherent radiation at harmonics of the laser wavelength. Studies to characterize the CHG pulses were performed and the facility was prepared for pump-probe experiments. However, in standard user mode, an RF phase modulation is applied to increase the electron beam lifetime which leads to a significant loss of efficiency of the laser-electron interaction. Recently, methods to avoid this difficulty have been found, allowing CHG operation while the RF phase modulation is applied.