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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 == 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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| === Facilities === | |
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| == 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). |
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| === 2019-02-12 === * Monday is public holiday. ==== Etc ==== * Wipe inside tanks with Vectra-Alpha wipes and ethanol. * Choose optimum BIO Config board switch settings for all OLs. See [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2081| D1302081]] for what each switch does. Four of them are gain stages (24 dB, 12 dB, 6 dB, 3 dB), and three are filters (all 1 Hz zero, 10 Hz pole). Please clarify the switch numbering and functions (switch "1" = circuit board B0 = group 1, filter A1; position 1 = enable?), make a cheat sheet and put a copy in each rack. |
=== 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? |
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| ==== BS ==== * Check focus of BS camera. * Debug stepper remote enable. |
=== 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. |
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| ==== SR2 ==== * Install GAS filter control loops. * Debug stepper remote enable. * Get rid of SR2 cable reel (shutdown FE and rack, replug everything into new power strip, start up rack and FE). * Split model. |
=== 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.)-- |
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| ==== SR3 ==== * Debug stepper remote enable. * Split model. |
=== 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.)-- |
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| ==== SRM ==== * Debug OL, especially whitening filter. Note that WF S1808108 has a mysterious note on its JGWDoc page suggesting it may have a fault. * Set up LEN OL (if/when 3D QPD stage arrives). * Debug stepper remote enable. * Check BIO connections for possible swap of GAS/IP. === Real-Time Model === * See [[KAGRA/Subgroups/VIS/OpsManual/Simulink]] * Restart k1vissrmt (Wednesday during maintenance??): * Re-convert filter files. * Stop SRM Guardian (just stop it dead - don't transition to SAFE; don't let it meddle at all). -Done for SRM and SR3 * 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. Be sure to update DCUID numbers: * SR2 FECT=54, FECP=55 -Done * SR3 FECT=56, FECP=57 -Done * (SRM FECT=58, FECP=59) * Update DCUID numbers also in /opt/rtcds/userapps/release/vis/common/medm/vissr2_overview_macro.txt and vissr3_overview_macro.txt. * Rebuild, restart k1vissr2t, k1vissr2p, k1vissr3t, k1vissr3p and initialize/test as for SRM/BS. * For SR2, just before restarting with the new real-time models, power the whole front end down and replug everything into the new power strip. * Turn off all DC-powered boxes. * Shut down the FE computer using the web server at [[http://10.68.99.171]]. * Turn off the IO chassis using the switch on the front. * Turn off the DC power supplies. * Replug all AC-powered stuff (DC supplies, IO chassis, signal generator, routers) into the new power strip that is already there. * Restore everything in reverse order. * Reset the signal generator: 10 kHz, 5 Vpp, sine wave, ON. === Guardian === * Make all Guardians point to TYPEB.py. -Done * Create a BURT `.req` file to backup the ALIGN settings for IP and GAS. -Done for BS and all SRs * Create a BURT `.req` file to back up the OPTICALIGN settings for the payload. -Done for BS and all SRs * Add UI to the MEDM screens to run BURT with either the ALIGN and OPTICALIGN `.req` files and generate `.snap` files with suitable names. -Done * Make sure the SAFE state turns off all ALIGN and OPTICALIGN offsets with long ramp times. * Have the transition from the SAFE state to the DAMPED state load the ALIGN offsets with long ramp times. * Have the transition from the DAMPED state to the ALIGNED state load the OPTICALIGN offsets with long ramp times 9and also enable damping). === Documentation and Operation Manual === * Add useful info from Enzo's notebook to BSData. === Minor Tasks === ==== Mechanical ==== |
== Minor Tasks == === Mechanical === |
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| == Electrical == | == Electronics == * Install Tanaka-san's LVDT sig gen cards (when available). * Test stepper remote enable system. * Put SR3 cleanbooth electronics in minirack. |
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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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| * Create SUMCON models for full BS and major installation milestones. | |
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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. |
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| ==== BS ==== | === BS === |
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| * (Continue to) soak the sapphire prisms off the dummy BS for reuse on the SRM metal mass. ==== SR3 ==== |
=== SR3 === |
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| ==== SRM ==== | === SRM === |
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| * 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. |
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.