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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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== 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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| * Get stuff from [[../WishList]] | * Get stuff from ../WishList <<Anchor(ComingWeeks)>> |
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| <<Anchor(ComingWeeks)>> === 2019-01-07,14,21 === ==== BS (top priority) ==== * --(Check that the suspension is floating. (It wasn't.))-- * --(Re-center OL and log value to capture yaw position. (We didn't bother because the chain wasn't in a good enough condition.))-- * --(Remove bolts (or wait for Mirapro to do).)-- * --(Remove tank lid.)-- * --(Look for cracks in F0 blades.)-- * --(Install new double-sided F0 fishing rod (need to get blades) and (if necessary) auxiliary !CuBe spring.)-- * Test new F0 FR. * Center new F0 FR (mid-range height is 75 mm). * --(Adjust amount of mass on F0 keystone to get correct height)--, and secure in place. * --(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. * Swap in new cables for geophones and other items. * Add longer studs for arc weights. * Replace geophones and add more arc weights to IP to get a lower frequency. * Re-calibrate the F0 GAS LVDT. * --(Confirm the positions of the IP LVDTs and Actuators)--, and update T1707205 if necessary. * Recenter the OL. |
=== 2019-03-04 === ==== Etc ==== * Help Fujii-kun with PRx. |
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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 (when available). (At a minimum, in the short term, 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). |
==== All ==== * Test stepper remote enable system. * 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 ==== * 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). |
==== BS ==== * Offload large IM/IRM yaw to IP or F0 yaw. |
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| * 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. * Add camera viewport (when available). == 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 ==== |
* Redo control filters for new topology. * Damping time measurements. |
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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. * Put FC on SRM-W and install it in its holder with 1.4 mm shims ready for possible use. |
* 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). |
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| === 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 |
=== Real-Time Model/Guardian === * See [[KAGRA/Subgroups/VIS/OpsManual/Simulink]] * Test Guardians. |
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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
2019-03-04
Etc
- Help Fujii-kun with PRx.
All
- Test stepper remote enable system.
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
- Offload large IM/IRM yaw to IP or F0 yaw.
SR2
- Redo control filters for new topology.
- Damping time measurements.
SR3
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).
Real-Time Model/Guardian
- Test Guardians.
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.