KAGRA/Subgroups/PEM/Meeting/250404/Agenda - JGW Wiki

Weekly PEM meeting

2025/04/04(Fri) 17:00-
Regular meeting
Zoom2 : https://zoom.us/j/6676627462

General announcement

New fiscal year start
- If you have idea for new schience and new project, please contact to Yokozawa
O4c url
- Now commissioning break, Re-start 4th June end 7th Oct.
  - Discussion about the engineering run
- KAGRA will join this with 10 Mpc sensitivity
Bi-month VK PEM meeting
- To discuss the analysis during their measurements
- Monday 17:00-(JST)
- First meeting would be 7th Apr.

Meeting and Conference issue

TOBA and Gravity Gradient Workshop
- url
- Various discussion
4/11 : FS地震学　B02班研究集会＠地震研
- Washimi will have a presentation
4/23,24 : From QUarks to Neutron Stars
- url
5/9~10 : JGWC研究会 @ JAXA相模原
- url
- 発表申込締切：2025年4月7日（月）
- 参加登録締切：2025年4月21日（月）
5/19~23 : GWADW2025 @ フロリダ
- url
5/25~28 : KIW12 @ 上海
- url
5/26~30: ET symposium @ ボローニャ
- url
- 締切：3/31
Other meetings url

If you have some presentation about PEM related, please contact to me.

Business travel

To Kamioka
From Kamioka
- Yokozawa (Tokyo 4/22-24)
- Yokozawa (JAXA 5/9-10??)
- Yokozawa (Kashiwa 5/14-16??)

Jurnal paper issue

Details are here!

Non-linear ICA paper
- Now we discussed about the playground
Schumann Resonance paper
- Long term observation, seasonal variance
- Amplified inside the mine
- Others
O4 PEM paper
- Start to investigate the topics
Microseism with machine learning
1 Hz seismic motion paper
- Start the investigation

General issue

Commissioning
- PRFPMI
  - Latest sensitivity url
  - IFI treatment
    - Found the loosed screw in STM2
    - Clear improvement 128 Hz, 220 Hz
  - Added the de-whitening filter to Type-A GAS filter
    - Disappeared the peaks around 20 Hz
  - Reducing the RMS of the DARM error
    - For the weaker coil driver
    - Installed the switching circuit
  - Damping the peaks around 40 Hz
  - PEM injection test
    - Washimi-san will report it
- Cooler status
  - One cryocooler for duct shield was several trouble
  - We carefully checked it
- Noise budget
出張PEM injection (planning form)

Preparation for O4b

Coil preparation for magnetic injection
- Done
Voltmeter preparation
- AC power monitor installation
- DC power monitor installation

Progress report

Ohashi
- Microseismic noise with machine learning
Kaku
- Magnetic field
Murofushi
- Earthquake and GIF noise
Ozaki
- Nearby earthquake
Obara
- Earthquake and suspension
Kume, Ueno
- Noise subtraction
Nishizawa
- Water newtonian noise
- Magnetic field analysis
Washimi
- PEM injection
Yokozawa
- Noise hunting

Place for memo