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== 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)-- -> [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9836|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 2.2 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 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 5 Summary * Write Section 6 Acknowledgments * Write References Section * Find Type A reference * Find cryogenic payload reference * Find bKAGRA reference * Find LIGO-India reference * Find NS-NS detection reference * Find initial detection reference |
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=== Facilities === | |
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=== 2019-01-21 === ==== Etc ==== * Work with Akutsu-san to get additional two camera viewports (for SR2 and SRM). * Open all dead geophones, replace preamps, test, seal, retest. * Get rid of all cable reels. |
== 2019-04-08 == === Etc === * Health checks of suspensions before pump down. * Tidy up. * Move charging station to more convenient location (e.g., near -X entrance). * Find and inventory all gluing tools. * MEDM * Fix DAC screen (split model issue). * Real-time and SUMCON models * Add temperature alarms. * Add secondary watchdog with lower threshold that puts all outputs to HOLD and then gets Guardian to ramp them down. * SDF * Document SDF in KOM * Make SDF states for Type B * SAFE * DCCTRL-ONLY * ALIGNED-IN-AIR * ALIGNED-IN-VACUUM |
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==== BS (top priority) ==== * Fix geophones. '''(Enzo on Wednesday or later.)''' * --(Fix touching issue.)-- * Secure any keystone trim mass. '''(Hirata-san or Fabian on Wednesday of later.)''' * --(Recenter the OL.)-- |
=== BS === === SR2 === * Measure decay time, rms with and without control. * Do FEA model of IRM side plates. |
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==== SR3 (priority 2) ==== * Survey optic height '''(Fabian on Monday) '''and raise suspension on jacks as necessary '''(Enzo, Hirata-san, Terrence and Fabian on Monday)'''.''' ''' * Reinstall OL LED (original one borrowed for SR2 - probably use new one to be supplied by Simon), probably change collimator, and realign OL. '''(Terrence on Monday and/or Tuesday.)''' * Secure any keystone trim mass. '''(Hirata-san or Fabian on Monday.)''' |
=== SR3 === * Put SR3 cleanbooth electronics in minirack. * Check pico adapter cables. |
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==== SR2 ==== * Survey optic height '''(Fabian on Monday)''' and raise suspension on jacks as necessary. '''(Enzo, Hirata-san, Terrence and Fabian on''' '''Monday and/or Tuesday.)''' * Remove tape, writing etc on PI and PI items. '''(Hirata-san on Monday and/or Tuesday.)''' * Secure any keystone trim mass. '''(Hirata-san or Fabian on Monday and/or Tuesday.)''' |
=== SRM === * Check pico adapter cables. * Debug 240 Hz noise in LVDT. * Check keystone lock screws in BF (on next vent). |
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==== SRM ==== * Raise suspension 3.5 mm on jacks. * Check/improve payload alignment and IM OSEMs. Recheck optic pitch with OL as needed.\ * Adjust F0 keystone trim to give desired height and secure weights in place. * Install geophones and arc weights. * Center and tune IP. * Hook LBB and add just enough ballast to have it bouncing. * Wipe inside tank with Vectra-Alpha wipes and IPA. * Set up TILT OL. |
== 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. * Check Panwei's measurements of OSEM noise. Pay special attention to the conversion into m/rtHz from V/rtHz. * Calculate the readut noise of the virtual sensors from the readout noise of the real ones. * --(IP LVDT.)-- * --(IP Geo: where's the data for SR2 geophones?)-- There's information in entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=6106|6106]]. For SRM the plots are at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8177|8177]] but where's the data? * --(GAS LVDT (no virtual sensors) )-- * --(IM OSEMS )-- * Oplev * 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)--. * Extract the filters designed by Enzo, Terrence and Lucia from the filter bank using Foton and write them in a format compatible with Takanori's simulation: --(IP LVDT)--, IP GEO, --(blending filters)--, --(GAS)--, --(IM)--, optic. * Check the whether the oplev takes into account the ground motion movement in longitudinal displacement (and in pitch and yaw if necessary). * Does the simulation take into account the 1/300 rads of the tunnel slope? * In the software modify the control feeback loop topology in order to have the same as in the real system. * Tune the filters in order to account for the differences between simulation and measurement. * As sanity check for the simulation, check the stability criteria and compare with Enzo's. * Ask whether there is a recent measurement of seismic motion at the the central room. |
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=== 2019-01-28 === ==== BS ==== ==== SRM ==== * Install camera viewport. (Mirapro will be available 1/28) * Setup LEN OL. * Add additional ballast to LBB to set desired height (only if someone will be putting stuff on it). * Install Enomoto-kun's beam target plate (when available). ==== SR3 ==== * Install camera viewport (already available). * Add additional ballast to LBB to set desired height (only if someone will be putting stuff on it). * Install camera. * Run cables for camera. ==== SR2 ==== * Add camera viewport (when available). * Add new feedthrough to lower part of tank (with Izumi-san-tachi)? * Install cable for MIF pico on LBB (with Izumi-san-tachi)? * Add additional mass to LBB to have it at the desired height * Install camera. * Run cables for camera. == Tasks To Be Scheduled == ==== 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). ==== SR2 ==== ==== SR3 ==== ==== SRM ==== * Find two geophone cables used by Okutomi-san. (I looked in the second floor EXV room but didn't find them - Mark.) * Find one geophone cable ordered for SRM but missing. * Rearrange miswired geophone cable. * Rebuild defective geophone cable. * Put FC on SRM-W and install it in its holder with 1.4 mm shims ready for possible use. === Tunnel === * Get at least one BIO Converter chassis fully connected (CONTEC BIO card, WD and stepper motor chassis) for implementation and test of stepper motor reset function. * Check SR2, SR3 TM coil gains for magnet polarity compensation. * Replace chipped magnets (12x12x12 mm) in SR3 IP, H1 and H2. === Mitaka or remotely === * Write generic Type B Guardian; make BS and SR3 inherit from it; make analog WD optional for now (all suspensions will get them eventually). * (Continue to) soak the sapphire prisms off the dummy BS for reuse on the SRM metal mass. * Install damping filters for SR2. * Review DAC channel requests. * Split SRx real-time models? == ASAP == * --(Get picomotor drivers back on line.)-- * --(Debug BS BIO connections, especially PI IP.)-- === Main Assembly Sequence === * Necessary for phase-I★★★ * --(Modify IP LVDT damping filters to include set point.)-- * --(TFs.)-- * '''''EXCHANGE YAW/VERT FRs at F0''''' * Necessary for phase-II★★ * Debug BS geophones. * Flip circuit boards in BS geophones to make them the same as SRx. * Calibrate IP LVDT actuation against IP LVDT sensing. (Klog 3553? http://klog.icrr.u-tokyo.ac.jp/osl/?r=3553) * Design PI Sensor blending filter. * Tune the LVDT sensitivity * Measure IP period; adjust ballast mass. * At some point (remotely)★ * Improve OL offloading. * Improve GAS offloading. * Spectral analysis of Oplev. * Design, install angular lock servo using OL. (Almost done for phase-I) * Adjust gains and debug damping for IM OSEMs and GAS LVDTs. (Almost done for phase-I) * Subtract DC level of Geophones. * Spectra analysis of PI sensors (PI LVDTs and Geophones). * Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs. * Set all EQ stops to TBD clearance. * Modify the model for IP coil driver control === Documentation and Operation Manual === * Add useful info from Enzo's notebook to BSData. <<Anchor(RealBSHang)>> == Tasks Not To Forget == === Major Tasks === * --(Move safety bars from BS AF area to SR2 area.)-- * Update circuit diagram. * (Time permitting) Try adding mass to IP. * Update BS Install Procedure with screenshots from new on-assembly-frame 3D CAD. * Finish assembly drawing for LBB and LBB damper ring and post on JGWDoc (Hirata-san). * Figure out how to make PI yaw adjustment reliable. === Minor Tasks === ==== Mechanical ==== |
== Minor Tasks == === Mechanical === |
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* --(Return/replace temporary ballast mass (dog clamps).)-- * Characterize replacement F0. * --(Wipe/clean arc weights that were rained on.)-- |
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==== Electrical ==== | == Electronics == * Pick better restore values for sat amps. * Install Tanaka-san's LVDT sig gen cards (when available). * Test stepper remote enable system. |
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* Organize stepper reset system and watchdog BIO. | * Add stepper remote enable system. * Include watchdog. |
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* Add default and as-built stepper channel assignments. | |
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==== Real-time and SUMCON models ==== * Create SUMCON models for full BS and major installation milestones. |
== Real-time and SUMCON models == * Add temperature alarms. * Add secondary watchdog with lower threshold that puts all outputs to HOLD and then gets Guardian to ramp them down. * Change cycle time of SR models to match BS (2K payload and 16K top). |
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* Make table of ADC/DAC assignments and check for consistency with D1503600 and k1visbs (Enzo, Mark) | * Make table of ADC/DAC assignments and check for consistency with D1503600. |
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== 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. |
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
- Find Type A reference
- Find cryogenic payload reference
- Find bKAGRA reference
- Find LIGO-India reference
- Find NS-NS detection reference
- Find initial detection reference
Every Week
- Vacuum and roll floor.
- Wipe ladders.
- Tidy tools, parts.
Get stuff from ../WishList
2019-04-08
Etc
- Health checks of suspensions before pump down.
- Tidy up.
- Move charging station to more convenient location (e.g., near -X entrance).
- Find and inventory all gluing tools.
- MEDM
- Fix DAC screen (split model issue).
- Real-time and SUMCON models
- Add temperature alarms.
- Add secondary watchdog with lower threshold that puts all outputs to HOLD and then gets Guardian to ramp them down.
- SDF
- Document SDF in KOM
- Make SDF states for Type B
- SAFE
- DCCTRL-ONLY
- ALIGNED-IN-AIR
- ALIGNED-IN-VACUUM
BS
SR2
- Measure decay time, rms with and without control.
- Do FEA model of IRM side plates.
SR3
- Put SR3 cleanbooth electronics in minirack.
- Check pico adapter cables.
SRM
- Check pico adapter cables.
- Debug 240 Hz noise in LVDT.
- Check keystone lock screws in BF (on next vent).
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.
- Check Panwei's measurements of OSEM noise. Pay special attention to the conversion into m/rtHz from V/rtHz.
- 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.
Extract the filters designed by Enzo, Terrence and Lucia from the filter bank using Foton and write them in a format compatible with Takanori's simulation: IP LVDT, IP GEO, blending filters, GAS, IM, optic.
- Check the whether the oplev takes into account the ground motion movement in longitudinal displacement (and in pitch and yaw if necessary).
- Does the simulation take into account the 1/300 rads of the tunnel slope?
- In the software modify the control feeback loop topology in order to have the same as in the real system.
- Tune the filters in order to account for the differences between simulation and measurement.
- As sanity check for the simulation, check the stability criteria and compare with Enzo's.
- Ask whether there is a recent measurement of seismic motion at the the central room.
Minor Tasks
Mechanical
- Put pointy-tipped screw in RM trolley for BS
Electronics
- Pick better restore values for sat amps.
- Install Tanaka-san's LVDT sig gen cards (when available).
- Test stepper remote enable system.
- 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
- Add temperature alarms.
- Add secondary watchdog with lower threshold that puts all outputs to HOLD and then gets Guardian to ramp them down.
- Change cycle time of SR models to match BS (2K payload and 16K top).
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.