Electron Source Characterizations and a New Spectrometer at PITZ

by Dr Sakhorn Rimjaem (DESY Zeuthen, Germany)

Tuesday 1 Feb 2011, 14:00 → 15:00 Europe/Zurich

WBGB/019 (PSI)

The Photo Injector Test facility at DESY, Zeuthen site (PITZ), has been established to characterise and optimise electron sources for the Free-Electron LAser in Hamburg (FLASH) and the European X-ray Free-Electron Laser (European XFEL). Dedicated diagnostic systems have been developed and installed on the PITZ beam line to study electron beam properties. Transverse projected emittance and phase space are measured using a single slit scan technique at the Emittance Measurement SYstem (EMSY) stations. Longitudinal phase space, beam momentum and momentum spread distributions are measured at spectrometers using a combination of a dipole magnet and an observation screen equipped with a TV system and/or streak camera readout. To demonstrate the European XFEL operation, an electron bunch train containing 3250 pulses of 1 nC bunch charge at a repetition rate of 10 Hz is required. The spectrometer and related equipment for studying the longitudinal phase space for such long pulse trains do not yet exist at PITZ. Construction of a new spectrometer and corresponding components in the dispersive arm is currently in progress. Besides the requirement to handle long electron bunch trains, the new dispersive arm is designed to allow measurements of the electron beam momentum up to 40 MeV/c, longitudinal phase space with high resolution of slice momentum spread and vertical slice emittance. In this presentation, details of the electron beam diagnostics at PITZ will be discussed. Details of the physics design, technical specifications and construction of the new spectrometer will be also presented.

 

Contact: Terence Garvey (4637)<o:p></o:p>