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Yin, Y.

Paper Title Page
TUPCH100 Fiberoptics-based Instrumentation for Storage Ring Longitudinal Diagnostics 1247
 
  • S. De Santis, J.M. Byrd, A. Ratti, M.S. Zolotorev
    LBNL, Berkeley, California
  • Y. Yin
    Y.Y. Labs, Inc., Fremont, California
 
  Many beam diagnostic devices in today's synchrotron rings make use of the radiation emitted by the circulating particles. Such instruments are placed in close proximity of the accelerator, where in many instances they cannot be easily accessed for safety consideration, or at the end of a beamline, which because of its cost, can only move the light port a few meters away from the ring. We present a study on the coupling of synchrotron light into an optical fiber for all those application where the longitudinal properties of the beam are measured (i.e., bunch length, phase, intensity, etc.). By choosing an appropriate fiber it is possible to keep attenuation and dispersion at negligible values over a large bandwidth, so that this method would allow to have the diagnostic instruments directly in the control room, or wherever convenient, up to several hundred of meters away from the tunnel. This would make maintaining and replacing instruments, or switching between them, possible without any access to restricted areas. Additionally, the few components required to be near the ring (lenses and couplers) in order to couple the light into the fiber are intrinsically radiation-hard.  
TUPCH103 New Developments on Single-shot Fiber Scope 1253
 
  • Y. Yin, X. Che
    Y.Y. Labs, Inc., Fremont, California
 
  New development has been done to reduce the noise and improve the stability of the single-shot fiber scope, which used an optical fiber recirculating delay line to regenerate the single-shot very short electrical pulse, so a sampling scope can recover the original signal. New measurements have been done and will be reported.