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Size: 3724
Comment:
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Size: 3873
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| * RF noise measurement around RF sideband frequency. * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/MIFIOOInterfaces|RF sideband frequency list]] |
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