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Archived items are at ../ToDoOld. | |
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Archived items are at [[../ToDoOld]]. | [[#EveryWeek|Every Week]] |
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[[#EveryWeek |Every Week]] [[#ComingWeeks |Coming Weeks]] |
[[#ComingWeeks|Coming Weeks]] |
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== Every Week == === Facilities === * Vacuum and roll floor. * Wipe ladders. * Tidy tools, parts. * Get stuff from [[../WishList]] |
== 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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== Tunnel == === Etc === * Tidy up. * Move charging station to more convenient location (e.g., near -X entrance). * Find and inventory all gluing tools. * Put pointy-tipped screw in RM trolley for BS * Put FC on SRM-W and install it in its holder with 1.4 mm shims ready for possible use. |
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<<Anchor(ComingWeeks)>> === 2019-01-07,14,21 === ==== BS (top priority) ==== * Check that the suspension is floating. * Re-center OL and log value to capture yaw position. * Look for cracks in F0 blades. * Install new double-sided F0 fishing rod (need to get blades) and (if necessary) auxiliary !CuBe spring. * Check that current defective yaw adjuster is at least locating the suspension in yaw. * Remove and service or swap out geophones (one has high noise, one has DC offset, all have flipped pinouts). Could use new geophones originally intended for SRM to save time. * Replace geophones and add more arc weights to IP to get a lower frequency. * Re-calibrate F0 GAS LVDT. * Adjust amount of mass on F0 keystone to get correct height, and secure in place. * Confirm the positions of the IP LVDTs and Actuators, and update T1707205 if necessary. * Install camera viewport??? |
== Shakedown/Characterization == === BS === === SR2 === * Measure decay time, rms with and without control. * Do FEA model of IRM side plates. |
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==== SRM ==== * Test new yaw mechanism. * Adjust F0 keystone mass to give desired height and secure weights in place. * Measure height of RM/TM relative to SS and height of SS relative to tank or Telada-san's reference. Raise suspension on jacks if necessary. * Borrow LED from SR2 and check/adjust optic pitch; return LED to SR2. * Install Enomoto-kun's beam target plate (if available). * Seal geophones. * Install geophones and arc weights. * Center and tune IP. * Install OL viewport (already available). * Install camera viewport if available. (At a minimum, remove flange cover temporarily and check that there is a good view of the HR surface.) * Hook LBB and add just enough ballast to have it bouncing. * Add additional ballast to LBB to set desired height (only if someone will be putting stuff on it). * Set up OL (needs various parts). |
=== SR3 === * Put SR3 cleanbooth electronics in minirack. * Check pico adapter cables. |
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==== SR3 ==== * Install/test new yaw mechanism. * Adjust height. * Realign OL. * Install camera viewport (already available). * Measure height of RM/TM relative to SS and height of SS relative to tank or Telada-san's reference. Raise suspension on jacks if necessary. * Add additional ballast to LBB to set desired height (only if someone will be putting stuff on it). |
=== SRM === * Check pico adapter cables. * Debug 240 Hz noise in LVDT. * Check keystone lock screws in BF (on next vent). |
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==== SR2 ==== * Adjust height. * Remove tape, writing etc on PI and PI items. * Add new feedthrough to lower part of tank (with Izumi-san-tachi)? * Install cable for MIF pico on LBB (with Izumi-san-tachi)? * Add ballast mass to LBB. * Measure height of RM/TM relative to SS and height of SS relative to tank or Telada-san's reference. Raise suspension on jacks if necessary. |
== SDF == * Document SDF in Operations Manual * Make SDF states for Type B, e.g.: * SAFE * DCCTRL-ONLY * ALIGNED-IN-AIR * ALIGNED-IN-VACUUM |
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== MEDM == * Fix DAC screen (split model issue). |
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== 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). |
== Guardian == * Rethink Guardian to |
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==== SR2 ==== | == RTM == * Make cycle times of BS models the same as for SRx. * Remove TM_OSEM subsystem from payload model. * Remove GEOWHITEN from IP of top model. * Remove ISIINF->CART2EUL->ISIWIT from IM. * WD/Guardian related * Add temperature alarms. * Add secondary watchdog with lower threshold that puts all outputs to HOLD and then gets Guardian to ramp them down. |
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==== SR3 ==== | == Simulation == * Create controls design description (cf [[https://dcc.ligo.org/LIGO-T1100378/public|LIGO-T1100378]]). * --(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: NO * Pitch and yaw * In the simulation, what are the assumed coupling between * LVDT-L ==> OpLev-PTM. * IP GEO-L ==> OpLev-PTM. * Longitudinal ground motion ==> OpLev-PTM. * OSEM-L ==> OpLev-PTM * And the above quantities with Oplev-YTM. * 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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==== 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. === 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 ==== * Put pointy-tipped screw in RM trolley for BS * --(Return/replace temporary ballast mass (dog clamps).)-- * Characterize replacement F0. * --(Wipe/clean arc weights that were rained on.)-- <<Anchor(elec)>> ==== Electrical ==== |
== Electronics == * Pick better resistor values for sat amps (to give closer to 32K open-light values). * Install Tanaka-san's LVDT sig gen cards when available). * Install Tanaka-san's hardware watchdogs. * Test and permanently enable stepper remote enable system. |
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* --(Make generic to Type B.)-- | |
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* Organize stepper reset system and watchdog BIO. * Include information on assignment of channels to feedthrough positions. * Reflect gender-changers and non-flipping feedthrough adapters. * Reflect actual cable lengths. * Include LVDT pin size (1 mm). * Include Stepper pin size (1.6 mm). |
* --(Add stepper remote enable system.)-- * --(Add note about gender-changers and non-flipping feedthrough adapters.)-- * --(Correct default stepper channel assignments and link to wiki for changes.)-- * --(Remove note about steppers with limit switches (we didn't use them).)-- * --(Include LVDT pin size (1 mm).)-- * --(Include Stepper pin size (1.6 mm).)-- |
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* --(Include blank page for watchdog.)-- * Include ''actual'' watchdog. * Include information on assignment of channels to feedthrough positions (or summarize on wiki and add link). |
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==== Real-time and SUMCON models ==== * Create SUMCON models for full BS and major installation milestones. * Create controls design description (cf [[https://dcc.ligo.org/LIGO-T1100378/public|LIGO-T1100378]]). * Make table of ADC/DAC assignments and check for consistency with D1503600 and k1visbs (Enzo, Mark) * 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. |
== 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 - BIG JOB - NOT WORTH IT. * Replace BS F0 yaw adjuster - DO AT NEXT VENT AFTER PARTS ARE AVAILABLE. === SR3 === * Replace chipped magnets (12x12x12 mm) in SR3 IP, H1 and H2. === SRM === * Install Enomoto-kun's beam target plate (if/when available). |
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
Tunnel
Etc
- Tidy up.
- Move charging station to more convenient location (e.g., near -X entrance).
- Find and inventory all gluing tools.
- Put pointy-tipped screw in RM trolley for BS
- Put FC on SRM-W and install it in its holder with 1.4 mm shims ready for possible use.
Shakedown/Characterization
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).
SDF
- Document SDF in Operations Manual
- Make SDF states for Type B, e.g.:
- SAFE
- DCCTRL-ONLY
- ALIGNED-IN-AIR
- ALIGNED-IN-VACUUM
MEDM
- Fix DAC screen (split model issue).
Guardian
- Rethink Guardian to
RTM
- Make cycle times of BS models the same as for SRx.
- Remove TM_OSEM subsystem from payload model.
- Remove GEOWHITEN from IP of top model.
Remove ISIINF->CART2EUL->ISIWIT from IM.
- WD/Guardian related
- Add temperature alarms.
- Add secondary watchdog with lower threshold that puts all outputs to HOLD and then gets Guardian to ramp them down.
Simulation
Create controls design description (cf LIGO-T1100378).
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: NO
- Pitch and yaw
- In the simulation, what are the assumed coupling between
- 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.
Electronics
- Pick better resistor values for sat amps (to give closer to 32K open-light values).
- Install Tanaka-san's LVDT sig gen cards when available).
- Install Tanaka-san's hardware watchdogs.
- Test and permanently enable stepper remote enable system.
- Update BS Circuit diagram, D1503600
Make generic to Type B.
Note removal of LED/PD on TM OSEMs.
Add stepper remote enable system.
Add note about gender-changers and non-flipping feedthrough adapters.
Correct default stepper channel assignments and link to wiki for changes.
Remove note about steppers with limit switches (we didn't use them).
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.
Include blank page for watchdog.
Include actual watchdog.
- Include information on assignment of channels to feedthrough positions (or summarize on wiki and add link).
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 - BIG JOB - NOT WORTH IT.
- Replace BS F0 yaw adjuster - DO AT NEXT VENT AFTER PARTS ARE AVAILABLE.
SR3
- Replace chipped magnets (12x12x12 mm) in SR3 IP, H1 and H2.
SRM
- Install Enomoto-kun's beam target plate (if/when available).