40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Wed Nov 27 18:51:22 2019, Gavin Wallace, Update, IMC, Q Measurement of Test Masses 
    Reply  Tue Dec 3 14:52:13 2019, rana, Update, IMC, Q Measurement of Test Masses 
Message ID: 15065     Entry time: Tue Dec 3 14:52:13 2019     In reply to: 15055
Author: rana 
Type: Update 
Category: IMC 
Subject: Q Measurement of Test Masses 

crying

Quote:

[Yehonathan, Gavin]

  1. Lock IMC
  2. Lock one of the arms (only) using the IR PDH signal feeding back to an ETM.
  3. Excite the ITM using the SR785 near 28.8 kHz
  4. Look for the resulting peak using the SR785 spectra of the POX or POY error signal from the demod board
  5. Based on the calibrated noise level of the POX/POY, estimate what the SNR will be of the internal mode peak.
ELOG V3.1.3-