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 * Extract the filters designed by Enzo, Terrence and Lucia from the filter bank using Foton and write them in a format compatible with Takanori's simulation (which uses his own function to define the filters).  * Extract the filters designed by Enzo, Terrence and Lucia from the filter bank using Foton and write them in a format compatible with Takanori's simulation: --(IP LVDT)--, IP GEO, Blending filter, --(GAS)--, --(IM)--, optic.

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
    • Find Type A reference
    • Find cryogenic payload reference
    • Find bKAGRA reference
    • Find LIGO-India reference
    • Find NS-NS detection reference
    • Find initial detection reference

Every Week

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

2019-04-08

Etc

  • Health checks of suspensions before pump down.
  • Tidy up.
    • Move charging station to more convenient location (e.g., near -X entrance).
    • Find and inventory all gluing tools.
  • MEDM
    • Fix DAC screen (split model issue).
  • Real-time and SUMCON models
    • Add temperature alarms.
    • Add secondary watchdog with lower threshold that puts all outputs to HOLD and then gets Guardian to ramp them down.
  • SDF
    • Document SDF in KOM
    • Make SDF states for Type B
      • SAFE
      • DCCTRL-ONLY
      • ALIGNED-IN-AIR
      • ALIGNED-IN-VACUUM

BS

SR2

  • Measure decay time, rms with and without control.
  • Do FEA model of IRM side plates.

SR3

  • Put SR3 cleanbooth electronics in minirack.
  • Check pico adapter cables.

SRM

  • Check pico adapter cables.
  • Debug 240 Hz noise in LVDT.
  • Check keystone lock screws in BF (on next vent).

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.
  • Check Panwei's measurements of OSEM noise. Pay special attention to the conversion into m/rtHz from V/rtHz.
  • Calculate the readut noise of the virtual sensors from the readout noise of the real ones.
    • IP LVDT.

    • IP Geo: where's the data for SR2 geophones? There's information in entry 6106. For SRM the plots are at 8177 but where's the data?

    • GAS LVDT (no virtual sensors)
    • IM OSEMS
    • Oplev
  • 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.

  • Extract the filters designed by Enzo, Terrence and Lucia from the filter bank using Foton and write them in a format compatible with Takanori's simulation: IP LVDT, IP GEO, Blending filter, GAS, IM, optic.

  • In the software modify the control feeback loop topology in order to have the same as in the real system.
  • Tune the filters in order to account for the differences between simulation and measurement.
  • As sanity check for the simulation, check the stability criteria and compare with Enzo's.
  • Ask whether there is a recent measurement of seismic motion at the the central room.

Minor Tasks

Mechanical

  • Put pointy-tipped screw in RM trolley for BS

Electronics

  • Pick better restore values for sat amps.
  • Install Tanaka-san's LVDT sig gen cards (when available).
  • Test stepper remote enable system.
  • 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

  • Add temperature alarms.
  • Add secondary watchdog with lower threshold that puts all outputs to HOLD and then gets Guardian to ramp them down.
  • Change cycle time of SR models to match BS (2K payload and 16K top).
  • 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.

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