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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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| === 2019-01-27 === === Etc === * Work with Akutsu-san to get additional two camera viewports (for SR2 and SRM). * Get rid of all cable reels * Currently we don't know where the SFs' and BFs' stepper motor are. We should decide whether we are going to move them soon or once they are in vacuum and in an stable suitable temperature (25 degrees for BS/SR2 and 24 degrees for SR3 and SRM). |
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| === SR3 === * Move the IP such that the horizontal stepper motors are in their respective mid-ranges. '''(Terrence Monday morning.)''' * Set the IP stops to an appropriate position. Confirm with Hirata-san who released the IP the latest. * Confirm the jacks supporting the mushroom head of the vacuum chamber must be withdrawn. If so, do it and center the IP again if necessary. '''(Monday.)''' * Centrer the IM in L, T, Y, V and R using the pico-motors. '''(Fabian and Terrence on Monday morning.)''' * Work with the alignment team when the yaw adjustment of the optic is required. ''Use the F0 yaw stepper motor''. '''(Maybe Monday.)''' * Work with the alignment team when the IM pitch requires adjustment. ''Use the IM pico-motor''. '''(Maybe Monday.)''' * Adjust the OSEM to a suitable position in case the pitch adjustment required cannot be achived in their current positions. This requires moving the panels sideways and/or the OSEM bodies in or out. * Once the OSEMs have been adjusted hang the optical table again. '''Now it is fixed to allow people sit or stand inside'''. |
=== 2019-02-12 === * Monday is public holiday. ==== Etc ==== |
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| === SR2 (Very similar to SR3's with additional items underlined.) === * Move the IP such that the horizontal stepper motors are in their respective mid-ranges. '''(Tuesday.)''' * Set the IP stops to an appropriate position. Confirm status with Enzo and Terrence. * Confirm the jacks supporting the mushroom head of the vacuum chamber must be withdrawn. If so, do it and center the IP again if necessary. '''(Tuesday.)''' * Centrer the IM in L, T, Y, V and R using the pico-motors. '''(Tuesday.)''' * Work with the alignment team when the yaw adjustment of the optic is required. ''Use the F0 yaw stepper motor''. * Work with the alignment team when the IM pitch requires adjustment. ''Use the IM pico-motor''. * __As requested by Enomoto-kun, work with him in the installation and cabling of the pick up mirror system. '''(Hirata-san has been assigned to this already.)''' __ * __Fix the optical table to prepare for optic cleaning and OSEM adjustment (as per optic alignment requirement.)__ * Adjust the OSEM to a suitable position in case the pitch adjustment required cannot be achived in their current positions. This requires moving the panels sideways and/or the OSEM bodies in or out. * __Liaise with Mirapro in removing the SR2 bellow at the +Y side. '''(Hirata-san.)'''__ * Work with Hirose-san in cleaning the optic. '''(Hirata-san.)''' * __Once the OSEMs have been adjusted and the optic has been cleaned hang the optical table again.__ |
==== All ==== * Debug stepper remote enable. * Do survey of numbering of coil drivers and corresponding Contec assignments. * 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. |
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| === SR3 (list incomplete!) === * Release the IM/RM/OPT/IP. '''(Fujii-kun and Fabian on Monday afternoon.)''' * Change geophones pre-amplifier. '''(Fabian on Monday morning.)''' === 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.)-- '''(Cancelled)''' * Work with Akutsu-san to get additional two camera viewports (for SR2 and SRM). * Open all dead geophones, replace preamps, test, seal, retest. --((For BS is was done.)-- For SRM not yet.) * Get rid of all cable reels. ==== 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]]. * --(Take to the tunnel a spare HPCD (or a modified LPCD) and a satellite amplifier. '''(Fabian on Monday.)''')-- * --(Fix geophones. '''(Enzo on Wednesday or later.)''')-- * --(Replace geophones. '''(Enzo whenever is fine for commisiong team.)''')-- * --(Fix touching issue.)-- * --(Secure any keystone trim mass. '''(Hirata-san or Fabian on Wednesday of later.)''')-- * --(Recenter the OL.)-- * Diagonalization of IP. '''(Enzo)''' * Install IP control loops. '''(Enzo)''' * Install GAS Filters control loops. '''(Enzo)''' * Install IM control loops. '''(Enzo)''' ==== SR3 (priority 2) ==== * --(Survey optic height )--'''--((Fabian on Monday))-- '''--(and raise suspension on jacks as necessary '''(Enzo, Hirata-san, Terrence and Fabian on Tuesday)''')--.''' ''' * 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 Tuesday.)''' * --(Secure any keystone trim mass. '''(Hirata-san or Fabian on Tuesday.)''')-- * Diagonalization of IP. '''(Enzo)''' * Install IP control loops. '''(Enzo)''' * Install GAS Filters control loops. '''(Enzo)''' * Install IM control loops. '''(Enzo)''' |
==== BS ==== |
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| * --(Survey optic height '''(Fabian on Monday)''')-- --(and raise suspension on jacks as necessary. '''(Enzo, Hirata-san, Terrence and Fabian on''' '''Tuesday.)''')-- * --(Remove tape, writing etc on PI and PI items. '''(Hirata-san on Tuesday.)''')-- * --(Secure any keystone trim mass. '''(Hirata-san or Fabian on Tuesday.)''')-- * Diagonalization of IP. '''(Enzo)''' * Install IP control loops. '''(Enzo)''' * Install GAS Filters control loops. '''(Enzo)''' * Install IM control loops. '''(Enzo)''' ==== SRM (postponed) ==== * 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. === 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). |
* Install GAS filter control loops. |
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| * 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. |
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| ==== 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. |
==== SRM ==== * '''Debug geophone channels!!!''' * 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). * Check BIO connections for possible swap of GAS/IP. |
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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). ==== 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. * Diagonalization of IM for SR2, SR3, SRM. Is BS one done?'''(When?)''' * 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 |
=== Real-Time Model/Guardian === * See [[KAGRA/Subgroups/VIS/OpsManual/Simulink]] * Work out what IM1 and IM2 items of BIO section are actually driving based on the rack survey. * Correct all user-facing text on BIO MEDM screen (e.g., "SRM IM-H MONITORS LPCD #1 = Contec #1L") to reflect reality. * Rename all IM1 and IM2 items in RTM to IMH and IMV per above. * Do a new BIO screen that points to new IMH and IMV channels (use search and replace in GEDIT), but keep the old version for the time being. * Finalize models. * * Make a new Type B Guardian as TypeB2.py or the like and edit it to drive all the new model features and ignore the removed bits. * -ALIGN blocks * -OPTICALIGN blocks. * +SET blocks. * +DCCTRL blocks * ??? * 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 and also enable damping). * One at a time, rebuild and reinstall the new models: * Note the current values of what will be the inputs to the DCCTRL blocks (typically inputs of corresponding DAMP blocks). * Turn off actuation in the old models with Guardian or manually, as considered appropriate. * Kill the old models. * Disable Guardian. * Do a fresh safe.snap. * Adjust Guardian symlink from TypeB.py to TypeB2.py. * Restart the model, load the safe.snap, and check for gross problems. * Restart the DAC. * Tweak the SET blocks to reproduce the positions noted earlier, then do a new safe.snap. * Enable the Guardian and carefully test it out state by state. * When all suspensions are changed over, edit MEDM screens to remove references to old channels. |
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<<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. |
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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 ==== | == Electrical == |
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| ==== Real-time and SUMCON models ==== | == Real-time and SUMCON models == |
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== 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). * (Continue to) soak the sapphire prisms off the dummy BS for reuse on the SRM metal mass. ==== SR3 ==== * Replace chipped magnets (12x12x12 mm) in SR3 IP, H1 and H2. ==== 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. |
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
Facilities
- Vacuum and roll floor.
- Wipe ladders.
- Tidy tools, parts.
Get stuff from ../WishList
2019-02-12
- Monday is public holiday.
Etc
All
- Debug stepper remote enable.
- Do survey of numbering of coil drivers and corresponding Contec assignments.
Choose optimum BIO Config board switch settings for all OLs. See 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
SR2
- Install GAS filter control loops.
SR3
SRM
Debug geophone channels!!!
- 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).
- Check BIO connections for possible swap of GAS/IP.
Real-Time Model/Guardian
- Work out what IM1 and IM2 items of BIO section are actually driving based on the rack survey.
- Correct all user-facing text on BIO MEDM screen (e.g., "SRM IM-H MONITORS LPCD #1 = Contec #1L") to reflect reality.
- Rename all IM1 and IM2 items in RTM to IMH and IMV per above.
- Do a new BIO screen that points to new IMH and IMV channels (use search and replace in GEDIT), but keep the old version for the time being.
- Finalize models.
Make a new Type B Guardian as TypeB2.py or the like and edit it to drive all the new model features and ignore the removed bits.
- -ALIGN blocks
- -OPTICALIGN blocks.
- +SET blocks.
- +DCCTRL blocks
- ???
- 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 and also enable damping).
- One at a time, rebuild and reinstall the new models:
- Note the current values of what will be the inputs to the DCCTRL blocks (typically inputs of corresponding DAMP blocks).
- Turn off actuation in the old models with Guardian or manually, as considered appropriate.
- Kill the old models.
- Disable Guardian.
- Do a fresh safe.snap.
Adjust Guardian symlink from TypeB.py to TypeB2.py.
- Restart the model, load the safe.snap, and check for gross problems.
- Restart the DAC.
- Tweak the SET blocks to reproduce the positions noted earlier, then do a new safe.snap.
- Enable the Guardian and carefully test it out state by state.
- When all suspensions are changed over, edit MEDM screens to remove references to old channels.
Documentation and Operation Manual
- Add useful info from Enzo's notebook to BSData.
Minor Tasks
Mechanical
- Put pointy-tipped screw in RM trolley for BS
Electrical
- Update BS Circuit diagram, D1503600
Note removal of LED/PD on TM OSEMs.
- 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).
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 SUMCON models for full BS and major installation milestones.
Create controls design description (cf 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.
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).
- (Continue to) soak the sapphire prisms off the dummy BS for reuse on the SRM metal mass.
SR3
- Replace chipped magnets (12x12x12 mm) in SR3 IP, H1 and H2.
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.