Reports 1-1 of 1 Clear search Modify search
MIF (Noise Budget)
yuta.michimura - 18:41 Wednesday 25 April 2018 (4834) Print this report
Comment to The first noise budget for bKAGRA Phase 1 (4793)

[Komori, Enomoto, Michimura on Apr 24-25]

NoiseBudget for bKAGRA Phase 1 was updated.
Attached plots are NB results at Apr 25 2018 16:10 JST.

SVN revision 2060:
1. Suspension and mirror thermal noise for ETMX at 300K and ETMY at 22K were added (see JGW-T1808172).

2. Added EUL2OSEM factor 0.25 for BS TM (see klog #4811). BS TM actuation efficiency mystery was pertially solved.

3. Added updated RF PD noise (see klog #4818).

4. Updated to use real seismometer signal at specified GPS time (see, also, klog #4351). NOTE that it uses the same signal also for vertical seismic noise.
K1:PEM-IY0_SEIS_NS_SENSINF_OUT_DQ for BS
K1:PEM-EX1_SEIS_WE_SENSINF_OUT_DQ for ETMX
K1:PEM-EY1_SEIS_NS_SENSINF_OUT_DQ for ETMY

5. It now gives open loop transfer function for both BS IM loop and BS TM loop. Attached OLTF is the OLTF from NB at Apr 25 2018 16:10 JST. NB gives IM/TM cross over frequency at ~0.3 Hz, whereas it was set to ~0.1 Hz (see klog #4820).

6. GPStime caption added in the plots.

SVN revision 2061:
1. Updated whitening/dewhitening filters, updated RF PD noise (see klog #4831).

2. Updated optical gain to 1.0e11 counts/m from 5.9e10 counts/m (see klog #4833).

3. It now outputs the noise budget result as a text file.

Images attached to this comment
Search Help
×

Warning

×