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Sasaki, S.

Paper Title Page
PS18 Planned X-Ray Imaging of the Electron Beam at the SPRING-8 Diagnostics Beamline BL38B2 145
 
  • S. Takano, M. Masaki, H. Ohkuma, S. Sasaki, M. Shoji, K. Tamura
    SPring, Japan Synchrotron Radiation Research Institute, SPring-8, Hyogo, Japan
 
  X-ray imaging observation of the electron beam is planned at the SPring-8 storage ring diagnostics beamline BL38B2 to evaluate small vertical emittance. The resolution target is 1 micron of electron beam size (1s). The synchrotron radiation from a dipole magnet source will be imaged by a single phase zone plate. Monochromatic X-ray with energy of 8keV will be selected by a double crystal monochromator. The magnification factor of the zoneplate is 0.27, and an X-ray zooming tube will be used as a detector to compensate for demagnification.  
PM02 Signal Processor for Spring8 Linac BPM 162
 
  • K. Yanagida, T. Asak, H. Dewa, H. Hanaki, T. Hori, T. Kobayashi, A. Mizuno, S. Sasaki, S. Suzuki, T. Takashima, T. Taniushi, H. Tomizawa
    SRRI, Japan Synchrotron Radiation Research Institute, Mikazuki, Hyogo, Japan
 
  A signal processor of the single shot BPM system consists of a narrow-band BPF unit, a detector unit, a P/H circuit, an S/H IC and a 16-bit ADC. The BPF unit extracts a pure 2856MHz RF signal component from a BPM and makes the pulse width longer than 100ns. The detector unit that includes a demodulating logarithmic amplifier is used to detect an S-band RF amplitude. A wide dynamic range of beam current has been achieved; 0.01 ~ 3.5nC for below 100ns input pulse width, or 0.06 ~ 20mA for above 100ns input pulse width. The maximum acquisition rate with a VME system has been achieved up to 1kHz.