PHASE-SPACE MEASUREMENT OF STORED ELECTRON-BEAM AT THE CORNELL ELECTRON STORAGE-RING USING A COMBINATION OF SLIT ARRAY AND CCD DETECTOR

A new technique for fast phase-space measurement has been developed and tested during a recent APS/CHESS undulator run. A measurement time of a few seconds was obtained by using a slit array and a high-resolution position sensitive detector system. The detector system consists of a CdWO4 scintillation crystal, an optical imaging system, and a CCD detector. The short measurement time increases the measurement accuracy by reducing the effects from the instabilities of the electron beam in storage ring. The vertical emittance at the Cornell Electron Storage Ring in single-bunch and low-current mode was measured, and reasonable agreement with the expected values for both source size and source divergence were obtained (σy=75 μm and σy'=12 μrad). The effects of the finite size of the first slit on the measurement results are discussed, and a comprehensive data analysis procedure is described. © 1995 American Institute of Physics.