Author: Ganter, R.
Paper Title Page
Observation of SASE at the SwissFEL Injector Test Facility  
  • R. Ganter
    PSI, Villigen PSI, Switzerland
  The SwissFEL Injector Test Facility is the primary test bed for the validation of new components as well as beam dynamics concepts for the SwissFEL project. In early 2014 it was operated for three months with an undulator prototype integrated into the beamline. SASE radiation was observed in the optical and ultraviolet. The SASE nature of the radiation was confirmed by both the determination of pulse energy statistics and the measurement of the photon beam divergence.  
slides icon Slides MOA02 [23.883 MB]  
MOP040 General Strategy for the Commissioning of the ARAMIS Undulators with a 3 GeV Electron Beam 107
  • M. Calvi, M. Aiba, M. Brügger, S. Danner, R. Ganter, R. Ischebeck, L. Patthey, T. Schietinger, T. Schmidt
    PSI, Villigen PSI, Switzerland
  The commissioning of the first SwissFEL undulator line (Aramis) is planned for the beginning of 2017. Each undulator is equipped with a 5-axis camshaft system to remotely adjust its position in the micrometer range and a gap drive system to set K-values between 0.1 and 1.8. In the following paper the beam-based alignment of the undulator with respect to the golden orbit, the definition of look-up tables for the local correction strategy (minimization of undulator field errors), the fine-tuning of the K-values as well as the setting of the phase shifters are addressed. When applicable both electron beam and light based methods are presented and compared.  
MOP041 Summary of the U15 Prototype Magnetic Performance 111
  • M. Calvi, M. Aiba, M. Brügger, S. Danner, R. Ganter, C. Ozkan, T. Schmidt
    PSI, Villigen PSI, Switzerland
  The first undulator prototype (U15) was assembled and magnetically tested. The instrumentation and the algorithms developed for the undulator optimization are presented and a comparison among different approaches is reviewed. The magnetic measurement results before and after the installation of the vacuum components are discussed. The summary of the undulator test with 100 MeV electron beam is presented and the impact of the radiation on the magnetics is addressed.  
THP046 Cu and Cs2Te Cathodes Preparation and QE History at the SwissFEL Injector Test Facility. 832
  • J. Bossert, R. Ganter, M. Schaer, T. Schietinger
    PSI, Villigen PSI, Switzerland
  The installation of a load-lock chamber attached to the SwissFEL gun gives the possibility to carefully prepare the metallic cathodes under vacuum and also to use semiconductor cathodes like Cs2Te cathodes which cannot be transported through air. The paper presents the preparation procedures used for copper (QE>1.e-4) and Cs2Te cathodes (based on a CERN recipe) together with surface analysis results (SEM, EDX, interferometry, microscopy). Finally, the QE evolutions obtained in the SwissFEL Injector test facility as well as in a test stand are discussed for both materials.  
THC02 Thermal Emittance Measurements at the SwissFEL Injector Test Facility 970
  • E. Prat, S. Bettoni, H.-H. Braun, M.C. Divall, R. Ganter, C.P. Hauri, T. Schietinger, A. Trisorio, C. Vicario
    PSI, Villigen PSI, Switzerland
  • C.P. Hauri
    EPFL, Lausanne, Switzerland
  In a laser-driven RF-gun the ultimate limit of the beam emittance is the transverse momentum of the electrons as they exit the cathode, the so-called intrinsic or thermal emittance. In this contribution we present measurements of the thermal emittance at the SwissFEL Injector Test Facility for electron beam charges down to a few tens of fC. We have studied the thermal emittance and QE dependence on the laser wavelength, the RF-gun gradient and the cathode material (Cu and Cs2Te).  
slides icon Slides THC02 [1.063 MB]