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| * http://klog.icrr.u-tokyo.ac.jp/osl/?r=4487 * http://klog.icrr.u-tokyo.ac.jp/osl/?r=4489 * http://klog.icrr.u-tokyo.ac.jp/osl/?r=4527 |
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| * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3848 | |
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| * alignment drift during the cool down | * alignment drift, height change during the cool down * http://klog.icrr.u-tokyo.ac.jp/osl/?r=4176 |
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| * differential seismic noise measured by Michelson (3-km CMRR) | * differential seismic noise measured by Michelson (3-km CMRR), GIF-X (1.5-km CMRR), IMC (26.65-m CMRR) |
Summary of Phase 1 Measurements
- Summary of Phase 1 measurements for bKAGRA Phase 1 paper.
Basic configurations
- input power
- power at detection RF PD
Reflection from one end mirror 0.20 mW (http://klog.icrr.u-tokyo.ac.jp/osl/?r=4876)
At dark fringe 56 +/- 10 uW (http://klog.icrr.u-tokyo.ac.jp/osl/?r=4903)
signal chain (http://klog.icrr.u-tokyo.ac.jp/osl/?r=4920)
- modulation frequency, modulation depth
16.87293 MHz (http://klog.icrr.u-tokyo.ac.jp/osl/?r=4831)
beta = 0.12 (from error signal amplitude), 0.2 (from RF power applied to EOM) (http://klog.icrr.u-tokyo.ac.jp/osl/?r=4876 , http://klog.icrr.u-tokyo.ac.jp/osl/?r=4907)
- vacuum level
- suspension and coil driver configurations (difference between the final configuration)
Michelson initial alignment
- details of slit method
Tcam and baffle PD performance (details-> Tcam paper)
- time delay, resolution ...
- succeefully monitored the beam under cryo baffles/shields
Installation accuracy
- Schunupp asymmetry measurement
- IMC length measurement
53.30299(2) m (http://klog.icrr.u-tokyo.ac.jp/osl/?r=4831)
Cryogenics
cooling curve (details -> CRY paper)
- alignment drift, height change during the cool down
Suspension characterization
- length actuation efficiency measurements for BS, comparison with expectations
- length actuation efficiency measurements for ETMX and Y, comparison with expectations
- seismic attenuation ratio measurements for ETMY and Y
- TF difference between ETMX and ETMY (room temperature and cryogenic)
- vertical to length coupling, other coupling measurements
Sensitivity and stability
- actuation efficiency drift
- alignment drift of suspensions
- visibility and optical gain drift
sensitivity stability, duty factor, lock duration (similar plots in https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5177)
- duty factor
- Total: 68.65%
- 4/28: 81.66%
- 4/29: 97.00%
- 4/30: 90.36%
- 5/01: 87.09%
- 5/02: 86.88%
- 5/03: 19.97%
- 5/04: 33.58%
- 5/05: 64.18%
- 5/06: 55.36%
- duty factor
- Noise budget
magnetic and acoustic noise from PEM injection (details -> PEM paper?)
- Earthquake in Hawaii 2018-05-04 22:32:55 (UTC)
- difference between iKAGRA and Phase-1?
Seismic noise, arm length drift
seismic spectra stability (similar plots in https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2971)
- differential seismic noise measured by Michelson (3-km CMRR), GIF-X (1.5-km CMRR), IMC (26.65-m CMRR)
- differential arm length drift, correlation between GIF-X
Hardware injection test
- CBC injection(2018/4/30 Night shift)
- CW injection(2018/5/2 Night shift)