Noise Subtraction subgroup
Pre-meeting
- Date/Time: Tuesday, November 5th, 2024, 1600-1800 JST (0700-0900 UTC)
- Connection Info.: Zoom1
- Agenda
Brief Overview of Noise Subtraction Activities
- Application to GW experiments/analysis
- What can be accomplished? How effective is it in improving sensitivity/analysis etc.?
Example of NonSENS subtraction at H1, November 2nd, 2024: https://ldas-jobs.ligo-wa.caltech.edu/~detchar/summary/day/20241102/cal/nonsens/#gallery-9
- What can be accomplished? How effective is it in improving sensitivity/analysis etc.?
Activities at KAGRA (Who?, Project name?, **Features?(What can and what can't be done?)**, Current status?, Future plan?)
- Algorithm development
- ARIMA(AR Integrated MA) : Fujimoto (OCU)
Liner ICA (Independent Component Analysis) : Yokoyama & Kume (RESCEU), Itoh & Kobayashi (OMU)
- ..
Non-liner ICA : Yokoyama & Kume (RESCEU)
DeepClean (CNN) : Yi, Chou, Yeh (NYCU, NTHU)
Ref.: https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.2.033066
- Low-Latency and Offline Deployment
KAGRA F2F　Summer 2024 Slides: https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=15977
- ..
LSTM : Itoh & Takatani (OMU)
JPS JGW-G2315456-v6
Master Thesis JGW-P2415615-v3
PINN (Physics-informed neural network) : Dan Chen & Sakemi
JPS 2023 Autumn JGW-G2315075
JPS 2024 Spring JGW-G2415603
Target noises & Witness channels study
- AC power 60 Hz and its harmonics
- Acoustic noise (PSL, IFI, OMC, ...)
- Other Dofs (CARM, MICH, PRCL)
- OMC length
- ASC
- Beam jitter (IMMT1 trans QPD)
- VIS
- Violin mode (w/o Witness channels)
- CAL lines
- issue: Safe channel
- Computers and Pipelines
GPU for offline DeepClean @ Taiwan
GPU for online DeepClean @ Kamioka
- Kashiwa KMST
- RESCEU
- Algorithm development
- Other efforts within LV(K)
- NonSENS (NON-Stationary Estimation of Noise Subtraction)
Derivation and description of algorithm: https://dcc.ligo.org/LIGO-T1800525
- Estimates the optimal noise subtraction based on witnesses for the noise and witnesses for modulation of the noise coupling
- Witness channel can be individual channels (linear subtraction), or product of two channels (bilinear subtraction)
- Running online at LHO/LLO
- Front-end implementations:
- The output channels are available in the control rooms, for use with commissioning, and are the same channels that analysis pipelines will use.
- ...
- NonSENS (NON-Stationary Estimation of Noise Subtraction)
- Application to GW experiments/analysis
Scope of the Group to be established
- Organization?
- Chia-Jui Chou from Natl. Yang Ming Chiao Tung U. will lead the group as the chief.
Will the group encompass all noise subtraction-related activities at KAGRA? (ICA+DeepClean+...)
Will the group focus specifically on areas that contribute to the commissioning timeline, i.e., low- or middle-latency?
- or...
- Roles/Goals for each phase
- During the commissioning period prior to participating in O4b observation
- During the O4b observation
- Q: Will the cleaned h(t) produced by this team be used as an official deliverable and released to the public?!
- For future phases O5/O6
- How collaborate with on-site commissioners/IFO experts?
- e.g.,
Commissioners may request specific noise subtraction, such as subtracting noise in channel-A using auxiliary channel-B?
- Commissioners may manage a safe channel list?
- ...
- What considerations should guide us as we progress? How should we work with the team?
- e.g.,
- Organization?
- NOTE: The following terms mean different things. Please use them correctly when discussing:
- Safe channel, Witness channel, Auxiliary channel, ...
- Online(front-end), Low-latency, Middle-latency, High-latency, (offline), ...