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PEM (Center)
tatsuki.washimi - 16:43 Friday 19 May 2023 (25312) Print this report
Comparison of the acoustic injection results at the MCF area

I compared the results of the swept sine acoustic injection tests at the MCF area, performed on May 14.
The first figure is the 0-1000 Hz range and the others are their zooming up.

  • 50 counts (orange) vs. 200 counts (green) of the DAC output, 100-120 Hz scan with 1 Hz steps
    • The results are almost similar for all frequencies. the green could project for a wider frequency range.
  • Around 120 Hz, 220 Hz, 340 Hz, and 520 Hz: The current sensitivity looks to be occupied by this acoustic noise.
    • Probably these projections have double counting with the REFL results, because these location are close each other.

   

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