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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 |
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=== Facilities === | |
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=== 2019-01-21 === ==== Etc ==== * Get the clean-room compatible vacuum machine from KEK people. Notify Hirose-san in case he wants to use it himself. '''(Fabian on Monday.)''' * 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. |
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==== BS (top priority) ==== * The suspension is not in a healthy state. We should check the IM horizontal OSEM coil driver, satellite amplifier and whether there's anything toching. See klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7725|7725]]. * 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.)-- |
== 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? |
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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.)''' |
=== 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 ==== * 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.)''' |
=== 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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==== 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. |
=== 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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=== 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 == * 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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==== Real-time and SUMCON models ==== * Create SUMCON models for full BS and major installation milestones. |
== Real-time and SUMCON models == |
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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
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.