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* Microphone2 (AUDIO-TECHNICA AT-VD6): ~320 mV/Pa (with Max gain, from measurement) | |
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* Microphone2 (AUDIO-TECHNICA AT-VD6): ~320 mV/Pa (with Max gain, from measurement) |
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* Accelerometer (8640A5): [[attachment:acc_amp180208.pdf|Araya-san's instruction.]] | * Accelerometer (8640A5):1000 mV/g (9.8 m/s^2/V), Amplifier [[attachment:acc_amp180208.pdf|Araya-san's instruction.]] |
PEM injection in bKAGRA phase1
(Description will be translated to English at some point)
Aims
In bKAGRA phase1,
- Investigate the projection of the environmental noise effect to the sensitivity of KAGRA interferometer
- Characterize the effect of the scattering light
- Morphologically study the environmental noise waveform
(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 modulation sideband frequencies.
Candidates of measurement points
- PSL
- IMC (mirrors, refl table)
- IFI
- PRM
- BS
- ETMX/Y (1F,2F)
- TMS (both end)
- WAB
- Arms
(including racks of each points for control and DAQ.)
Schedule
(VERY ROUGH)
- 2017/12/06 Project started
- 2017/12/26 Rehearsal of rehearsal
- Before bKAGRA phase1 run (Detailed date has not been fixed): Preparation
- 2018/01/11-12: Preparation of reharsal
- 2018/02/13-15 (option 2/16): Rehearsal of PEM injection (end-to-end test, maybe without actual injection)
- 2018/04/09-13: Second rehearsal
- After bKAGRA phase1 run (Detailed date has not been fixed): Injection test in tunnel (2 days)
- After injection test: Analysis, make report, (if possible) write paper
Sensors and instruments information
Common
Items |
Numbers |
Part Number |
Need to order |
Ordered |
We have |
JGW S-number |
Comment |
Amplifier |
1 |
QSC RMX5050a |
No |
No |
Yes |
|
|
Head set |
6 |
No |
Yes |
Yes |
N/A |
|
|
Small accelerometer |
several |
KISTLER Accelerometer Type 8640A5 |
No |
No |
Yes |
|
|
Laser accelerometer |
1 |
Not known |
No |
No |
Yes? |
N/A |
RION |
Clay(?) to fix accelerometer |
a few |
Not known |
No |
No |
Yes? |
N/A |
|
Cables and connectors |
many |
Not known |
Partially need? |
No |
Partially no? |
N/A |
|
Low noise filter |
1 |
Not known |
Need |
No |
No |
N/A |
Like SR560. Hand made? |
Function generator |
1 |
AFG3022C |
No |
No |
Yes |
N/A |
|
Acoustic injection
Items |
Numbers |
Part Number |
Need to order |
Ordered |
We have |
JGW S-number |
Comment |
Large speaker |
2 |
JBL JRX212 |
No |
No |
Yes |
||
Small speaker (PZT) |
1 |
Not known |
Need |
No |
No |
N/A |
(If possible) |
Microphone |
1 |
B&K 4188 + 2671 (case) + 1704 (pre-amp) |
No |
No |
Yes |
|
|
Microphone2 |
2 |
AT-VD6 + AT-MA2 (amp) |
No |
No |
Yes |
|
|
Seismometer |
1 |
Trillium compact 120-SV1 |
No |
No |
Yes |
|
|
Earplug |
6 |
No |
Yes |
Yes |
N/A |
|
|
Rubber stack |
8 |
No |
Yes |
Yes |
N/A |
(If possible.) |
|
Horn |
1 |
Not known |
Need |
No |
No |
N/A |
|
Magnetic injection
Items |
Numbers |
Part Number |
Need to order |
Ordered |
We have |
JGW S-number |
Comment |
Large Coil |
1 |
Not known |
No |
Yes |
No |
N/A |
a few Ohms, ~1 m dia. |
Small Coil |
1 |
Not known |
Need |
No |
No |
N/A |
(If possible) |
Magnetometer |
2 |
Mag-13MCL100 +amplifier |
No |
No |
Yes |
||
Small magnetometer |
1 |
Mag649 |
No |
No |
Yes |
N/A |
Ando lab's instrument, 3 axes can be measured |
Shaker injection
Items |
Numbers |
Part Number |
Need to order |
Ordered |
We have |
JGW S-number |
Comment |
Large Magnet coil shaker |
1 |
Not known |
No |
No |
Yes |
N/A |
NAOJ |
Small shaker |
1 |
LW142.FS-2 |
No |
Yes |
Yes |
|
|
Mallet |
1 |
Not known |
No |
Yes |
Yes |
N/A |
|
Impulse hammer |
1 |
GK-4110G20 |
No |
Yes |
Yes |
|
Others
Items |
Numbers |
Part Number |
Need to order |
Ordered |
We have |
JGW S-number |
Comment |
RF antenna |
2 |
Not known |
Need |
No |
No |
N/A |
Could be made ourselves? |
RF signal amplifier |
2 |
Not known |
Need |
No |
No |
N/A |
Could be made ourselves? R&Kとかは? |
RF generator |
1 |
Not known |
Need |
No |
No |
N/A |
(If possible. Can Moku:Lab be used?) |
RF spectrum analyzer |
1 |
Not known |
No |
No |
Yes |
N/A |
Moku:Lab |
To be prepared
- CDS (Real time model, DAC, ADC, DQ)
- Calibration (Sensors, DAC, ADC)
ADCの入力インピーダンスは10 kΩ (ref. JGW-T1200779 or Shoda-san's PhD thesis.)
- Analysis code to calculate coupling function (peaks, comb, broad)
- Spectrogram tools
- MEDM
Calibration
ADC: (for single-ended sensors) 20/215 V/count (0.0006103515625), (for differential sensors) 10/215 V/count (0.0003051757812)
- input impedance 10 kΩ
- Small magnetometer (Mag649, Range +/-100 uT): 30 mV/uT (from manual)
Microphone (BRÜEL & KJÆR 4188): 31.6 mV/Pa (from manual)
- Microphone2 (AUDIO-TECHNICA AT-VD6): ~320 mV/Pa (with Max gain, from measurement)
- 以下のようなフィルターで補正:
rpoly([1;851.0859999999958;464981.9999999983],[1;0;0],0.9999999999999996)zpk([0;0],[1;1],1,"n") butter("HighPass",3,3)gain(3.125)
- (res freq: 108.5 Hz, Q: 0.8012, gain:3.125, 3-order Butterworth high-pass, 2-order high-pass: 1 Hz)
- 以下のようなフィルターで補正:
photosensor for toy pendulum (リハーサルのインジェクション対象): 1.12 V/mm (@4.2mm(micrometer), from measurement)
- Impulse hummer (GK-4110G20): 0.23 mV/N (from web page, 4379 N/V)
Accelerometer (8640A5):1000 mV/g (9.8 m/s^2/V), Amplifier Araya-san's instruction.
Number of usable channel for each rack
★ 最低限なにかしらのDAQがほしい場所
- MC、PRエリア(IMC0ラックに寄生?)
- BS、SRエリア(PR2ラックに寄生?+追加のADCはここ)
- IXCエリア(WABラックに寄生?)
- IYCエリア(WABラックに寄生?)
- EXCエリア(???誰)
- EYCエリア(???誰)
- IXVエリア(TypeAラック、CryoP?)
- IYVエリア(TypeAラック、CryoP?)
- EXVエリア(TypeAラック、CryoP?)
- EYVエリア(TypeAラック、CryoP?)
- Xアーム (PX1ラックに寄生?)
- BNCの配線を考えると、コレぐらいのエリアが最低限で現実的。
- 最初はざっくり10枚ADCがほしいとリクエストしてみましたが、無理でした。
To do list
Currently, to do list is managed in github project (github issue): https://github.com/gw-analysis/detector-characterization
Current milestone: (On-site) Install sensors and consider their operation, (Off-site) Analyze rehearsal data and prepare actuators (by 2018/03/30)
- Obtain S/N on JGWdoc for all PEM related things, e.g. sensors, actuators, amplifiers, non-standard cables.
- アナログ回路(~10 kHzの早いインジェクション用)を作る。
- 確保できるチャンネル数の中で、やること/できることを具体化する。
- センサー・アクチュエータ類のキャリブレーション。
主にコイル(他はマニュアルを信じる) --> 長野
磁束計Mag13のセットアップ --> 田中
コイルの作製 --> 長野
MEDM画面の作成 --> 誰か+シフト
- フィルターバンクに各センサーのキャリブレーションファクターを入れておく。
イメージはこんな感じ。MEDMdesign_PEMinjectionVer2.png
- エンドでの作業手順(2階へのものの搬入、クリーンブース内の中2階へのアクセス方法等)をTypeAチームに相談する。
- Xエンド2階へはT3で、Yエンド2階へはキャタピラ付きのキャリー(名称不明)で坂を登って運び入れている(by奥富さん)。
Results
Meetings
Next meeting is 2018/04/12 18:00-- Detchar meeting
What has been done
- Consider how many DAC, ADC, CH are required at each measurement point.
- 大きい加振機の所在を麻生さんに確認。
- Differential input/output of CDS. (CDSの差動入出力への対応。)
- Consider how many people are required.
- 解析コードを作る人手を確保。
磁束計の検討 --> 長野
ホワイトニングフィルターの確保 --> 端山
- 山本さんにCALで似たようなコードを作ってないか確認する。
- Calibrate sensors and actuators.
- Consider how to calibrate them.
- Consider how to connect all instruments.
- Ground problem. (各実験エリア(特にエンド)でのグラウンドの確認。)
Make analysis codes --> Hayama, Pil-jong
- Gather all required instruments listed in above tables.
持っている機器、買う必要がある機器の確認し、見積りを取る。-->長野
- 小さい加振機の検討。
各エリアで確保できるデジタルのチャンネル数の確認。--> EXC: 端山、EXV: 端山、IMC0: 三代、BS: OK
- 予行演習・本番測定の人手の確保。
ラックの状況をまとめる --> 三代
加振機の確保 --> 三代・端山
既存のセンサー・アクチュエータのリスト化 --> 端山(シフトコール)
Detcharの計算機にPython(vertualenv環境)をインストールする。-->端山・Pil-jong
- アンプ(QSC RMX5050a)の入出力コネクターを作る。(2セットずつ)
Paper plan
- 腕方向の地面振動のキャビティ的蓄積