Differences between revisions 46 and 47
Revision 46 as of 2019-02-20 11:17:19
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Editor: MarkBarton
Comment:
Revision 47 as of 2019-02-20 12:32:03
Size: 8633
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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 * Write Type B paper Section 2.1 Overview
  * Steal or reproduce Type Bp Figure 1 (optic layout)
  * Steal or reproduce Type Bp paper Figure 2 (suspension comparison)
 * Write Type B paper Section 2.2 Requirements for Type B
 * Write Type B paper Section 3.1 Mechanical
  * Choose photo of Type B suspension in mid-air
  * Make diagram of Type B in vacuum chamber
 * Write Type B paper Section 3.2 Sensors and Actuators
 * Write Type B paper Section 3.3 Control and Damping
  * Make controls diagram like Type Bp paper Figure 7
 * Write Type B paper Section 4.1 Damping Time
  * Make decay time plot like Type Bp paper Figure 8
 * Write Type B paper Section 4.2 Residual Velocity
 * Write Type B paper Section 4.3 Residual Angular Fluctuations
 * Write Type B paper Section 4.4 Vibration Isolation Performance
 * Write Type B paper Section 5 Summary
 * Write Type B paper Section 6 Acknowledgments
 * Write Type B paper References Section
 * 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

VIS Type B To-Do List

Archived items are at ../ToDoOld.

Every Week

Coming Weeks

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 2.2 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

Every Week

Facilities

  • Vacuum and roll floor.
  • Wipe ladders.
  • Tidy tools, parts.
  • Get stuff from ../WishList

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 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

  • Check focus of BS camera.

  • Debug stepper remote enable.

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

  • Debug stepper remote enable.
  • Split model.

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).

    • 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

    • SR3 FECT=56, FECP=57

    • 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.

  • Create a BURT .req file to backup the ALIGN settings for IP and GAS.

  • Create a BURT .req file to back up the OPTICALIGN settings for the payload.

  • Add UI to the MEDM screens to run BURT with either the ALIGN and OPTICALIGN .req files and generate .snap files with suitable names.

  • 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

  • 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.

KAGRA/Subgroups/VIS/TypeB/ToDo (last edited 2019-12-18 12:38:30 by fabian.arellano)