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AdV-ISC (Commissioning up to first full interferometer lock)
boldrini, mantovani, spinicelli, pinto, bossilkov, liu - 15:02 Monday 07 September 2026 (69700) Print this report
DRMI 3F recovery

We recovered the DRMI state to allow the INJ crew to proceed with the reduction of the injected power. 

We needed to change a few phases that were preventing the lock:

DRMI_1F:

  • MICH_phi0: -1.95 -> -2.35 
  • PR_TX_GAIN 0.75 -> 0.55

DRMI 3F:

  • MICH_phi0: -0.45 -> 3.7

 

Noticeably, the image of B1p is different from before, as it now looks like there are two beams impinging on the photodiode (Fig.1).

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Comments to this report:
mwas - 15:01 Monday 07 September 2026 (69701) Print this report

Piernicola mentioned that this double spot shape of B1p in DRMI was already present in August. Figure 1 shows an example showing that.

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