Calibration Tasks and Milestones (Towards O3)

Goals

• Make the whole chain of h(t) reconstruction running with Pcal
  • 3 types of h(t) provide (online, low latency, offline)
  • online h(t) generation using Pcal(DGS)
  • low latency and offline will be similar code
• Accuracy at the initial LIGO O1 level (10%,10deg.)
  • LIGO also have many try and error
  • free sweging is used for calibration method comparison
  • final goal is 1%, 1deg.
• By the starting of phase-2 engineering run (well in advance of joining O3)

Task (Responsible and sub-responsible person(s))

• Cross out if the tasks are completed

Listing-up (S.Haino and responsible people)

• List-up tasks and responsible person

• List-up milestones and deadline
• Submit the list of task and milestone to the KAGRA scheduler

Pcal (Y.Inoue, C.Kozakai, Cory, Bin-Hua)

• Install Pcal at X and Y-end and coordinate the long-term Pcal characterization

• Prepare for the necessary EPICS channels to the online system for the calibration

• List-up the systematic error budget table for O3
• Achieve 1% displacement error
• Absolute power calibration
  • Contact person of working standard of Toyama univ.
  • Absolute calibration organization
• Maintenance at Kamioka site.
• BH should stay Kamioka and periodic work
• Telephoto camera
  • Installation is almost done
  • Maintenance of TCam is done by T.Yokozawa
  • IR filter issue(spare camera), additional spare camera.
  • Image analysis by Tomigami.

Front-end (T.Yamamoto, +1person from off-site)

• Make the models for the online h(t) reconstruction [status: ongoing | expected finish: Mar. 15, 2019]

• Provide the necessary DAQ channels for the low-latency calibration[status: ongoing | expected finish: Mar. 15, 2019]

• ...

Low-latency and offline (D.Tuyenbayev, S.Tsuchida, S.Haino)

• Ask to LIGO CAL team for the detailed information of gstlal-calibration (DT) [status: ongoing | expected finish: none]

• Make gstlal-calibration running on a machine at KAGRA (DT, SH) [status: ongoing | expected finish: Jul 15]

  • Find names and versions of all prerequisite libraries
  • Install prerequisites and gstlal-cal package on a machine at AS
  • Test gstlal-cal pipeline on an AS machine
  • Install prerequisites and gstlal-cal package on a machine at KAGRA
  • Test the pipeline on a KAGRA machine

• Use gstlal-calibration for the offline h(t) reconstruction of bKAGRA phase-1 data (ST, DT) [status: to do | expected finish: Aug 15]

  • Note: depends on the installation of gstlal-cal on a machine at AS
  • Produce dummy output equivalent to online cal output
  • Compare gstlal and online outputs of bKAGRA phase-1 data

• Generate status vector (DT, ST, SH) [status: to do | expected finish: Sep 15]

  • Decide status vector bits
  • Modify (adapt) the function that generates the status vector
  • Produce the status vector data

• Generation of FIR filters for KAGRA DARM model (ST, DT) [status: to do | expected finish: end of bKAGRA phase-2]

  • Note: Depends on the readiness of the DARM model

• Feed KAGRA online channels into gstlal-calibration and generate low-latency h(t) (ST, DT, SH) [status: to do | expected finish: end of bKAGRA phase-2]

  • Note: Depends on the readiness of DMT
  • Run run the pipeline in low-latency during bKAGRA phase-2

DARM model (T.Yamamoto, D.Tuyenbayev, T.Yokozawa)

• Make a subway map of the KAGRA DARM model
• Optimize the calibration lines
• Coordinate the Open Loop Gain (OLG) Transfer function measurements
• Estimate and trace the slow time variation of the calibration parameters
• Electronics transfer function.

Pcal verification (Y.Inoue,...)

• Coordinate h(t) calibration with the Free-swinging Michelson method
• Compare h(t)s calibrated between Free-swinging Michelson and Pcal
• Compare h(t)s calculated between diff,common,...

Hardware injection (T.Yokozawa, Cory )

• Make the online model for the hardware injection with actuators[status: fist version finished | expected finish: end of August]

• Make the online model for the hardware injection with Pcal[status: fist version finished | expected finish: end of August]

• Coordinate the hardware injection tests[status: to do | expected finish: end of bKAGRA phase-2]

• Analyze the hardware injected data and verify the DARM subway map[status: to do | expected finish: end of bKAGRA phase-2]

Systematic errors assignment (T.Sawada, Y.Inoue, S.Haino, T.Yokozawa)

• Estimate the systematic errors due to calibration
• Make a simulation.
• Provide the number (amplitude and phase) for the data analysis group
• Provide the calibration envelopes for the data analysis group
• (If possible) Incorporate DARM model and parameter uncertainties in the data analysis
  • A.Miyamoto will show the first results of the effect of calibration uncertainties to the POP III data analysis