Bpm Processing

Work on flexible, system-independent and highly configurable processing code.

Beam arrival time detection

• Using diode signal for detecting bunches
• The number of signal peaks gives the number of bunches
• The derivative peaks at the signal front
• Use 3-point parabola to find the peak time
• Need to include cross-checks on the number of peaks detected for the signal and its derivative

• Bunch 1, Cband, 4 ps RMS jitter:
  

• Bunch 2, Cband, 2 ps RMS jitter:
  

• Bunch 1, Sband, 7 ps RMS jitter:
  

• Bunch 2, Sband, 6 ps RMS jitter:
  

• Bunch 2 vs. bunch 1, Cband, 5 ps RMS jitter:
  

• Bunch 2 vs. bunch 1, Sband, 10 ps RMS jitter:
  

Signal arrival time detection

• Signals do not seem to follow the trigger
  

• This can be seen in the rectified amplitudes
  

• This is seen for all signals, and the jitter seems to be independent
• Relative jitter does not depend on the bandwidth of the smoothing filter
  

• rectX2Norm52.png:
  

• rectX2NormMax.png:
  

• rectY2NormMax.png:
  

• rectRXYNormMax.png:
  

• T0vsPhi.png: