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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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== 2019-04-08 == === 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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=== 2019-02-04 === ==== Etc ==== * --(Get additional two camera viewports.)-- * --(Get rid of SRM cable reel.)-- * --(Run cables for cameras (with Kokeyama-san).)-- * --(Install BIO config boards on OL whitening filters for SR2, SR3, SRM)-- * Get rid of SR2 cable reel (shutdown FE and rack, replug everything into new power strip, start up rack and FE). * Wipe inside tanks with Vectra-Alpha wipes and IPA. |
=== BS === === SR2 === * Measure decay time, rms with and without control. * Do FEA model of IRM side plates. |
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==== BS ==== * --(Install BNC cables for stepper remote enable.)-- * Debug stepper remote enable. * Debug BS camera. |
=== SR3 === * Put SR3 cleanbooth electronics in minirack. * Check pico adapter cables. |
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==== SR2 ==== * --(Release LBB; add approximate final ballast.)-- * --(Install IM control loops.)-- * --(Decide buoyancy correction and pre-apply as much as possible, leaving optic at nominal height.)-- * --(Install BNC cables for stepper remote enable.)-- * --(Install camera viewport.)-- * --(Install camera.)-- * Install GAS filter control loops. * Debug stepper remote enable. * Split model. |
=== SRM === * Check pico adapter cables. * Debug 240 Hz noise in LVDT. * Check keystone lock screws in BF (on next vent). |
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==== SR3 ==== * --(Release the optical table again.)-- * --(Adjust LBB damper and rods to give correct height and gap at mid-range on the blades.)-- * --(Add approximate final ballast.)-- * --(Install camera viewport.)-- * --(Install camera.)-- * Debug stepper remote enable. * Split model. |
== 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 (which uses his own function to define the filters). * 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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==== SRM ==== * --(Decide buoyancy correction and pre-apply as much as possible, leaving optic at nominal height.)-- * --(Install camera (with Kokeyama-san).)-- * --(Set up TILT OL.)-- * --(Adjust LBB damper and rods to give correct height and gap at mid-range on the blades.)-- * --(Add approximate final ballast.)-- * --(Split model.)-- * Set up LEN OL. * Debug stepper remote enable. * Check BIO connections for possible swap of GAS/IP. == 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 ==== * Install Enomoto-kun's beam target plate (if/when available). * 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 === * Replace chipped magnets (12x12x12 mm) in SR3 IP, H1 and H2. === Mitaka or remotely === * (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? === Real-Time Model === * Restart k1vissrmt (Wednesday during maintenance??): * Stop SRM Guardian (just stop it dead - don't transition to SAFE; don't let it meddle at all). * Make fresh safe.snap. * Note all TEST and OPTICALIGN offsets. * Put large ramp times (≈30++ s) in all DAMP, TEST and OPTICALIGN filters. * Turn off all DAMP, TEST, and OPTICALIGN filter offsets and master switch. * Restart k1vissrmt. If there are gross problems, consider restarting the whole FE. * Restore safe.snap. * Debug OVERVIEW, IP and WD screens (check for white channels etc). * Restore OPTICALIGN offsets (if necessary), transfer TEST offsets to new ALIGN filters and set long ramp times. * Set new WD thresholds for IP LVDT and ACC. * Enable all DAMP, ALIGN, and OPTICALIGN offsets. * Make sure SRM Guardian is pointing to generic Type B Guardian. * Adjust Type B Guardian code to set long ramp times on all DAMP, ALIGN and OPTICALIGN filters. Wrap the ALIGN stuff in an if block for now to not break BS/SR2/SR3. * Reenable Guardian if/when satisfied. * Rebuild and restart k1visbst and initialize/test as for SRM. * Create new k1vissr2t, k1vissr2p, k1vissr3t, k1vissr3p based on k1vissrmt and k1vissrmp. * Update DCUID numbers in /opt/rtcds/userapps/release/vis/common/medm/vissr2_overview_macro.txt and vissr3_overview_macro.txt. * SR2 FECT=54, FECT=55 * SR3 FECT=56, FECT=57 * (SRM FECT=58, FECP=59) * Rebuild, restart k1vissr2t, k1vissr2p, k1vissr3t, k1vissr3p and initialize/test as for SRM/BS. === 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. === Minor Tasks === ==== Mechanical ==== |
== Minor Tasks == === Mechanical === |
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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 (which uses his own function to define the filters).
- 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.