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| * Attendance: Yokozawa, Washimi, Miyo, Kozakai, Oshino, Mori, Miyoki, Okawa, Fujikawa, TTanaka, Kaihotsu, Kokeyama | * Attendance: Yokozawa, Washimi, Miyo, Kozakai, Oshino, Mori, Miyoki, Okawa, Fujikawa, TTanaka, Kaihotsu, Kokeyama, Yamat, Yamada |
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| * Move the MCE seismometer to PR2, more seisometer will be IXA | |
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| * | * Now KOACH filter was turned off * check the coupling between controls signals * PMC is sound noise dominant * Some coupling to the IMC controls signal * sound effect or vibration effect? * nokogiri wave |
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| * GWpy based library which can use in the Kashiwa server, kamioka server * condor job management by shell script * timeseries, and so on * userful shell script * PSL PEM at last year * Spectrogram with whitened data * Electronic ADC noise with 400Hz? * glitch plots with Yuzu summary page * trigger rate histogram |
Minute of PEM meeting
- Date: 2019/6/11 16:00-18:00(JST)
- Attendance: Yokozawa, Washimi, Miyo, Kozakai, Oshino, Mori, Miyoki, Okawa, Fujikawa, TTanaka, Kaihotsu, Kokeyama, Yamat, Yamada
- Expand meeting
=== Agenda ===
- PEM status (Yokozawa) (10min)
- 2nd installation was almost finished, need the check of the chamber PEMs
- Virgo PEM measurements (Yokozawa) (10min)
- Sound decay measurement
- IYC chamber characterization
- Comparison between Virgo and KAGRA
- Characterization of the EXC chamber (Washimi) (10min)
- Why EXC? Removed the cryopayload and prepared ADC. Additional measurement by IYC
- FFU on/off
- Around 1Hz from cooler, 20.45, 30.62, 60.94, ... No problem to KAGRA sensitivity
- Evaluate the magnetic field by simulation after closing the chamber.
- Acoustic measurement, 13-59Hz and more than 1kHz from cooloer. (also, about 10kHz with 2Hz frequency)
- Coherence observed from only the fan
- 2Hz did not appear at the chamber accelerometer
- X-end PEM models
- Before/After cooling down
- 0.5 deg increasing by the ondotori
- Thunderstorm was detected by magnetometer, gorogoro
- DC supply no significance difference before/after cooling
- mag 1,3Hz appear
- sound some line appear, but FFU was on.
- Power supply monitors (Washimi) (10min)
- DC power monitor for the 18/24V
- noise floor is limited by ADC noise
- 60Hz was observed
- 100Hz AC was quite dirty
- Need the more safety AC monitor
- We need to focus the power supply issue continuously
- Acoustic and magnetic field measurement (Kaihotsu) (10min)
- With KIW6 slide
- Acoustic/magnetic field map generation
- 300Hz peak for the acoustic spectral
- 100Hz comes from air cooler?
- 1Hz magnetic field from the air cooler
- position dependence of the 1Hz amplitude around OMC
- Sotsuron was uploaded to the KAGRA wiki, preferred to upload to JGWDoc
- Current PEM measurements (Mori) (10min)
- Introduction of the chromebook
- access by USB or inner monitor
- Evaluation the sound from the beam duct ~2kHz
- Vacuum pump vibration?
- Want to evaluate the effect to the scattered light
- We will buy the accelerometer with USB
- Ground motion (Miyo) (10min)
- Move the MCE seismometer to PR2, more seisometer will be IXA
- Sound injection (TTanaka) (10min)
- Acoustic injection with Microphone
- Now KOACH filter was turned off
- check the coupling between controls signals
- PMC is sound noise dominant
- Some coupling to the IMC controls signal
- sound effect or vibration effect?
- nokogiri wave
- PEM injection plan (TTanaka) (10min)
- Kozapy+ (Kozakai) (20min)
- GWpy based library which can use in the Kashiwa server, kamioka server
- condor job management by shell script
- timeseries, and so on
- userful shell script
- PSL PEM at last year
- Spectrogram with whitened data
- Electronic ADC noise with 400Hz?
- glitch plots with Yuzu summary page
- trigger rate histogram
Report from DetChar (Yamamoto, Kokeyama) (10min)
- Summary and future prospect (Yokozawa) (10min)