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| * Measuring coupling functions between environmental noise and interferometer signal * Measuring environmental noise using several sensors * Spectrogram of the interferometer signal during injection |
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| * Narrow down coupling locations * Narrow down environmental noise source locations * Switch off test * Identify line noise sources * RF noise measurement around RF sideband frequency. * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/MIFIOOInterfaces|RF sideband frequency list]] === Candidates of measurement points === * PSL * IMC (mirrors, refl table) * IFI * PRM * BS * ETMX/Y (1F,2F) * WAB * Arms (including racks of each points for control and DAQ.) |
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| * Before bKAGRA phase1 run (Detailed date has not been fixed): Preparation * After bKAGRA phase1 run (Detailed date has not been fixed): Injection test in tunnel * After injection test: Analysis, make report, (if possible) write paper |
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| Before bKAGRA phase1 run (Detailed date has not been fixed): Preparation | == Sensors and instruments information == === Common === ||Items||Numbers||Part Number||To be ordered||Ordered||We have||Comment || ||Amplifier||1|| Not known||No||No||Yes|| || ||Head set||several|| Not known||Yes||No||No|| || ||Small accelerometer ||a few|| Not known||No||No||Yes?|| || ||Clay(?) to fix accelerometer ||a few|| Not known||No||No||Yes?|| || ||Cables and connectors||many|| Not known||Yes?||No||No?|| || ||Low noise filter||1|| Not known||Yes||No||No||Like SR560. Hand made? || ||Function generator ||1|| Not known||No?||No||Yes?|| || |
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| After bKAGRA phase1 run (Detailed date has not been fixed): Injection test in tunnel | |
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| After injection test: Analysis, make report, (if possible) write paper | === Acoustic injection === ||Items||Numbers||Part Number||To be ordered||Ordered||We have||Comment || ||Large speaker||2|| Not known||No||No||Yes|| || ||Small speaker (PZT)||1|| Not known||Yes||No||No||(If possible) || ||Microphone||2|| Not known||No||No||Yes|| || ||Seismometer ||1|| Not known||No||No||Yes|| || ||Earplug ||several|| Not known||Yes||No||No|| || ||Rubber stack ||8|| Not known||Yes||No||No||(If possible) || ||Horn ||1|| Not known||Yes||No||No|| || |
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| == Sensors information == | === Magnetic injection === ||Items||Numbers||Part Number||To be ordered||Ordered||We have||Comment || ||Large Coil||2|| Not known||Yes||No||No||a few Ohms, ~1 m dia. || ||Small Coil||1|| Not known||Yes||No||No||(If possible) || ||Magnetometer ||2|| Not known||No?||No||Yes?|| || ||Small magnetometer ||2|| Not known||Yes||No||No||(If possible) || |
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| == Meeting == | === Shaker injection === ||Items||Numbers||Part Number||To be ordered||Ordered||We have||Comment || ||Large Magnet coil shaker||1|| Not known||No||No||Yes||NAOJ || ||Small PZT shaker||a few|| Not known||Yes||No||No|| || ||Mallet||1|| Not known||Yes||No||No|| || === Others === ||Items||Numbers||Part Number||To be ordered||Ordered||We have||Comment || ||RF antenna||2|| Not known||Yes||No||No||Could be made ourselves? || ||RF signal amplifier ||2|| Not known||Yes||No||No||Could be made ourselves? || ||RF generator ||1|| Not known||Yes||No||No||(If possible. Can Moku:Lab be used?) || ||RF spectrum analyzer ||1|| Not known||No||No||Yes||Moku:Lab || == To be prepared == * CDS (Real time model, DAC, ADC, DQ) * Calibration (Sensors, DAC, ADC) * Analysis code to calculate coupling function (peaks, comb, broad) * Spectrogram tools == Meetings == [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/DET/PEMinjection/bKAGRA-phase1/meeting_20171206|2017/12/06 Kick-off meeting]] |
PEM injection in bKAGRA phase1
(Description will be translated to English at some point)
Aims
bKAGRA phase1 における、
- 干渉計感度への環境雑音の影響のプロジェクション
- 散乱光のキャラクタリゼーション
- 雑音の形態学的スタディ
Injection types
- Acoustic injection (AcI)
- Magnetic injection (MaI)
- Shaking injection (ShI)
What we want to do
Necessary
- Measuring coupling functions between environmental noise and interferometer signal
- Measuring environmental noise using several sensors
- Spectrogram of the interferometer signal during injection
If possible
- Narrow down coupling locations
- Narrow down environmental noise source locations
- Switch off test
- Identify line noise sources
- RF noise measurement around RF sideband frequency.
Candidates of measurement points
- PSL
- IMC (mirrors, refl table)
- IFI
- PRM
- BS
- ETMX/Y (1F,2F)
- WAB
- Arms
(including racks of each points for control and DAQ.)
Schedule
(VERY ROUGH)
- Before bKAGRA phase1 run (Detailed date has not been fixed): Preparation
- After bKAGRA phase1 run (Detailed date has not been fixed): Injection test in tunnel
- After injection test: Analysis, make report, (if possible) write paper
Sensors and instruments information
Common
Items |
Numbers |
Part Number |
To be ordered |
Ordered |
We have |
Comment |
Amplifier |
1 |
Not known |
No |
No |
Yes |
|
Head set |
several |
Not known |
Yes |
No |
No |
|
Small accelerometer |
a few |
Not known |
No |
No |
Yes? |
|
Clay(?) to fix accelerometer |
a few |
Not known |
No |
No |
Yes? |
|
Cables and connectors |
many |
Not known |
Yes? |
No |
No? |
|
Low noise filter |
1 |
Not known |
Yes |
No |
No |
Like SR560. Hand made? |
Function generator |
1 |
Not known |
No? |
No |
Yes? |
|
Acoustic injection
Items |
Numbers |
Part Number |
To be ordered |
Ordered |
We have |
Comment |
Large speaker |
2 |
Not known |
No |
No |
Yes |
|
Small speaker (PZT) |
1 |
Not known |
Yes |
No |
No |
(If possible) |
Microphone |
2 |
Not known |
No |
No |
Yes |
|
Seismometer |
1 |
Not known |
No |
No |
Yes |
|
Earplug |
several |
Not known |
Yes |
No |
No |
|
Rubber stack |
8 |
Not known |
Yes |
No |
No |
(If possible) |
Horn |
1 |
Not known |
Yes |
No |
No |
|
Magnetic injection
Items |
Numbers |
Part Number |
To be ordered |
Ordered |
We have |
Comment |
Large Coil |
2 |
Not known |
Yes |
No |
No |
a few Ohms, ~1 m dia. |
Small Coil |
1 |
Not known |
Yes |
No |
No |
(If possible) |
Magnetometer |
2 |
Not known |
No? |
No |
Yes? |
|
Small magnetometer |
2 |
Not known |
Yes |
No |
No |
(If possible) |
Shaker injection
Items |
Numbers |
Part Number |
To be ordered |
Ordered |
We have |
Comment |
Large Magnet coil shaker |
1 |
Not known |
No |
No |
Yes |
NAOJ |
Small PZT shaker |
a few |
Not known |
Yes |
No |
No |
|
Mallet |
1 |
Not known |
Yes |
No |
No |
|
Others
Items |
Numbers |
Part Number |
To be ordered |
Ordered |
We have |
Comment |
RF antenna |
2 |
Not known |
Yes |
No |
No |
Could be made ourselves? |
RF signal amplifier |
2 |
Not known |
Yes |
No |
No |
Could be made ourselves? |
RF generator |
1 |
Not known |
Yes |
No |
No |
(If possible. Can Moku:Lab be used?) |
RF spectrum analyzer |
1 |
Not known |
No |
No |
Yes |
Moku:Lab |
To be prepared
- CDS (Real time model, DAC, ADC, DQ)
- Calibration (Sensors, DAC, ADC)
- Analysis code to calculate coupling function (peaks, comb, broad)
- Spectrogram tools