First, I measured the spectrum with excitation.
Fig.1 - Fig.6. showed the results compared with the Aug 2024
We adjuseted NBDAMP filters (L1,2,3, and 5)
- L1: changed the filter from FM3(pink) to FM1(red)
- L2: changed the filter from FM3(brown) to FM1(red)
- L3: checked FM3(original one) and FM1(300K one). As FM3(brown) looks better than FM1(red), we keep using FM3.
- (L4: not be closed at LOCK_AQUISITION)
- L5: Measured TF had too large gain peaking. So we comment out the line which closes this loop in the guardian code.
After this work, we checked the ETMX suspension can reach the LOCK_AQUISISION state and back to ISOLATED state. (The L5 loop was not closed as we expected.)
The current temperature of ETMX is 270K.
We adjusted T1-T3 NBDAMP filters.
- T1: Changed from FM3(pink) to FM1(cyan), and adjusted FM1(red)
- T2: Changed from FM3(brown) to FM1(red)
- T3: Copied FM3(cyan) to FM5 and modified FM5(5.336, 271K) for the adjustment.
(Wide)
MN DAMP L
MN DAMP T
(NB)
P1
Y1, Y2, Y3 and Y4 (with spectrum of the IM Y photo sensor)
