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== Simulation == * --(Get a good set of TFs and put them in a common directory:)-- * Directory: /kagra/Dropbox/Subsystems/VIS/TypeBData/SR2/simulation/TF/ * Content: diaggui xml files and regular text files. * Compare the Matlab prediction with the measurements. * In a reasonable way tune the parameters of the simulation in ordet to get a good agreement. * It should include resonant peaks not predicted by the simulation. * Write a klog about this. * Given the fact that Takanori's Matlab simulation provides the TFs in units of [m/N] calculate a calibration factor for each GAS LVDT and IP and IM virtual actuator, which are in units of [µm/cnt]. * Collect the measurements of LVDT and OSEM readout noise and put them in a common directory: * Location: /kagra/Dropbox/Subsystems/VIS/TypeBData/SR2/simulation/sensor_readout_noise/ * Content: duaggui xml files and regular text files. * Calculate the readut noise of the virtual sensors from the readout noise of the real ones. * Estimate coil driver noise. It seems this is not expected to contribute significantly but we should still know. * Convert real actuation noise to virtual actuation noise. * Check whether the Matlab simulation implements the output of the length sensing oplev. |
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VIS Type B To-Do List
Archived items are at ../ToDoOld.
Paper
Review Type Bp paper
Choose paper title -> "Vibration isolation systems for the beam splitter and signal recycling mirrors of the KAGRA gravitational wave detector"?
Create JGWDoc number for paper -> P1909836
Decide paper author list -> KAGRA Author List 2019?
- Write Type B paper abstract
- Write paper outline
- Write Type B paper Section 1 Introduction
- Vibration isolation systems in KAGRA
- Write Section 2.1 Overview
- Steal or reproduce Type Bp Figure 1 (optic layout)
- Steal or reproduce Type Bp paper Figure 2 (suspension comparison)
- Write Section 2.1 Overview
- Write Section 2.2 Requirements for Type B
- Write Section 3 Design of the Type-B suspension
- Write Section 3.1 Mechanical
- Choose photo of Type B suspension in mid-air
- Make diagram of Type B in vacuum chamber
- Write Section 3.2 Sensors and Actuators
- Write Section 3.3 Control and Damping
- Make controls diagram like Type Bp paper Figure 7
- Write Section 3.1 Mechanical
- Write Section 4 Measured performance
- Write Section 4.1 Damping Time
- Make decay time plot like Type Bp paper Figure 8
- Write Section 4.2 Residual Velocity
- Write Section 4.3 Residual Angular Fluctuations
- Write Section 4.4 Vibration Isolation Performance
- Write Section 4.1 Damping Time
- Write Section 5 Summary
- Write Section 6 Acknowledgments
- Write References Section
Simulation
Get a good set of TFs and put them in a common directory:
- Directory: /kagra/Dropbox/Subsystems/VIS/TypeBData/SR2/simulation/TF/
- Content: diaggui xml files and regular text files.
- Compare the Matlab prediction with the measurements.
- In a reasonable way tune the parameters of the simulation in ordet to get a good agreement.
- It should include resonant peaks not predicted by the simulation.
- Write a klog about this.
- Given the fact that Takanori's Matlab simulation provides the TFs in units of [m/N] calculate a calibration factor for each GAS LVDT and IP and IM virtual actuator, which are in units of [µm/cnt].
- Collect the measurements of LVDT and OSEM readout noise and put them in a common directory:
- Location: /kagra/Dropbox/Subsystems/VIS/TypeBData/SR2/simulation/sensor_readout_noise/
- Content: duaggui xml files and regular text files.
- Calculate the readut noise of the virtual sensors from the readout noise of the real ones.
- Estimate coil driver noise. It seems this is not expected to contribute significantly but we should still know.
- Convert real actuation noise to virtual actuation noise.
- Check whether the Matlab simulation implements the output of the length sensing oplev.
Every Week
- Vacuum and roll floor.
- Wipe ladders.
- Tidy tools, parts.
Get stuff from ../WishList
2019-03-18
Etc
- Tidy up.
- Throw out foil and other garbage.
- Gather and clean tools.
- Gather and organize unused parts and fasteners.
- Pull out unused cables in cable tray near SR3.
- Return all unused cables to tent.
- Move charging station to more convenient location (e.g., near -X entrance).
BS
Debug IP H2 connection!
Improve immobilization of OL breadboard.
- Reinstall LEN OL.
- Double-check calibration of IP H3 LVDT: is the offset of ≈-805 µm at mechanical zero from klog 8377 correct per previous klogs etc?
SR2
Recalibrate OL with improved procedure.
Do pitch/longitudinal decoupling. L2P filter
- Tidy up cables in rear of SR2 rack.
- Measure decay time, rms with and without control.
Choose optimum BIO Config board switch settings.
- Install AntiWTN filter.
SR3
Recalibrate OL with improved procedure.
- Check pico cables (one may have been stolen for SRM).
- Install AntiWTN filter.
Choose optimum BIO Config board switch settings.
SRM
Replace SRM whitening chassis with correct type.
Choose optimum BIO Config board switch settings.
- Install AntiWTN filter.
Set up LEN OL.
Design/install control filters.
- Measure TM TFs.
- OL2EUL matrix
- Design/install control filters for TM DAMP and OLDCCTRL.
Set up SRM Guardian.
- Check pico adapter cables.
- Debug 240 Hz noise in LVDT.
Get thermometer for SRM booth.
Minor Tasks
Mechanical
- Put pointy-tipped screw in RM trolley for BS
Electronics
- Install Tanaka-san's LVDT sig gen cards (when available).
- Test stepper remote enable system.
- Put SR3 cleanbooth electronics in minirack.
- Update BS Circuit diagram, D1503600
Note removal of LED/PD on TM OSEMs.
- Add stepper remote enable system.
- Include watchdog.
- Include information on assignment of channels to feedthrough positions.
- Reflect gender-changers and non-flipping feedthrough adapters.
- Add default and as-built stepper channel assignments.
- Reflect actual cable lengths.
- Include LVDT pin size (1 mm).
- Include Stepper pin size (1.6 mm).
Undo renumbering of IP items.
Page 10: "DIO Card # 0" should be "DIO Card # 1"
Include OutConfigBoards on OL page (Sheet 18).
Update HPCD section to reflect:
All three GAS channels are on HPCD #1 and DIO Card #2, CNB cables, Sheet 13.
Three IP channels are on HPCD #0 and DIO Card #2, CNA cables, Sheet 15.
Real-time and SUMCON models
Create controls design description (cf LIGO-T1100378).
- Make table of ADC/DAC assignments and check for consistency with D1503600.
- Understand/document/debug Kokeyama-san's DIO stuff.
- Measure LPCD and HPCD output filter response.
- Design and install software compensation filters for LPCD and HPCD output filters.
Guardian
Documentation and Operation Manual
- Add useful info from Enzo's notebook to BSData/etc.
OLs
- Design/procure/install permanent hard protective boxes.
One Day, If Ever Needed
BS
- Tune BS LBB (adjust table height, damper height) - DON'T BOTHER (unless there's an excuse to open the lower half of the tank).
- Replace BS F0 thrust bearing and yaw adjuster - BIG JOB, DON'T BOTHER (unless lack of yaw adjustment becomes a major problem).
SR3
- Replace chipped magnets (12x12x12 mm) in SR3 IP, H1 and H2.
SRM
- Install Enomoto-kun's beam target plate (if/when available).
- Put FC on SRM-W and install it in its holder with 1.4 mm shims ready for possible use.