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| * PEM tasks March | * PEM tasks in March |
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| * Acoustic injection to PSL room was done * Acoustic injection to REFL table was done. * We set additional accelerometers to the leg of the MCF chamber ground, IMMT1/ISS and PRM chamber leg [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13293|klog13293]] * Analysis is ongoing by Washimi-san ant TTanaka-san |
* Done : PSL room, PR booth, BS booth, (SR booth) * ToDo : IXC booth, IYC booth, EYC booth, TMSY booth * Shaker injection * ToDo : OMC leg, ISS, IMC table, REFL tabel, ... |
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| * But we concluded that vibration of the logs of the OMC chamber were not the dominant noise source in the current sensitivity * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13152|klog13152]] and [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13199|klog13199]] | * --(But we concluded that vibration of the logs of the OMC chamber were not the dominant noise source in the current sensitivity)-- |
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| * F2F (2020/4/17-20 @ Kashiwa) [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/LCGT/Meeting/f2f/2020Apr|wiki]] | * F2F (2020/4/17-20 @ Kashiwa) [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/LCGT/Meeting/f2f/2020Apr|wiki]] ->canceled |
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| * GND meeting report (Yokozawa) * Acoustic injection result (Washimi, TTanaka) * Sound in DARM [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13373]] * Sound in other channels : [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13298]] * Consideration of current PEM injection analysis : [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13263]] * Seismometer tilt coupling (Washimi, Miyo) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13321]] * 23.3Hz noise investigation (TTanaka) |
* PEM injection result (Washimi) [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11550|JGW-G2011550]] |
Weekly PEM meeting
- 2020/03/06(Fri) 14:00-(JST)
- Regular meeting (Japanese)
Web meeting with Zoom2 (Zoom2)
Agenda
General issue
- Interferometer status
- Observation run started without O3 joining
- Maximum 500kpc BNS detection range
- Lock duration is 1h -4h
- Alignment dependence
- Duty cycle ~65%
- We need ~1h for initial alignment
- If microseismic motion is large, we could not lock the interferometer
- 3/10 - commissioning break
- Commissioning break (2020/03/10 9 am -03/24 9 am)
- After the commissioning meeting, I and Washimi-san make the schedule.
- PEM tasks in March
- PEM injection
- Hammering test
Hammering tests to the OMC, SRs, BS and PR2 were done [http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]
- There is large excitation when we touched the legs of the OMC chamber
But we concluded that vibration of the logs of the OMC chamber were not the dominant noise source in the current sensitivity
- Next target of investigation is the duct between PR2 and BS
- Candidate of the 60-90Hz noise
- Discussion about the PEM flags
- This may not be used during O3 run, but it is good practice toward the O4 run
- Help the RRT(Rapid Response Team, quick discussion for the event submitted to the GraceCB)
- Seismic motion flag
- Evaluate the effect of the FFUs and vacuum pumps by turning on during interferometer lock
- If the excitation detected, we have to consider about the FFUs which are working.
- Conference
F2F (2020/4/17-20 @ Kashiwa) wiki ->canceled
Each progress
- Discussion about the list of the general issue (Yokozawa)
- Bruco analysis (Yokozawa)
- PEM coherence search to the longer locked data (Yokozawa)
PEM injection result (Washimi) JGW-G2011550
- Plan of the lock loss study (Fujikawa)