Toward the bKAGRA Hardware Injection The 3rd KAGRA International - - PowerPoint PPT Presentation

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Toward the bKAGRA Hardware Injection The 3rd KAGRA International - - PowerPoint PPT Presentation

Feb 24, 2023 358 likes •528 views

Toward the bKAGRA Hardware Injection The 3rd KAGRA International Workshop 2017/05/21@Academia Sinica, NTU campus Osaka City University : Takaaki Yokozawa on the behalf of calibration subgroup The 3rd KIW Toward bKAGRA Hardware Injection

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SLIDE 1

Toward the bKAGRA Hardware Injection

The 3rd KAGRA International Workshop 2017/05/21@Academia Sinica, NTU campus Osaka City University : Takaaki Yokozawa

  • n the behalf of calibration subgroup
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SLIDE 2

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Contents

  • (reminder) iKAGRA Hardware Injection
  • Toward the bKAGRA Hardware Injection
  • toward next bKAGRA run
  • Hardware Injection with Photon calibrator
  • (discussion) Injection waveform
  • Summary

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SLIDE 3

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Hardware Injection test (HWI test)

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  • One of the important end-to-end test
  • To displace end mirror (by actuator or photon radiation pressure), we quasi-

inject the gravitational wave

  • detector response, digital control, data acquisition system, signal calibration,

data transfer, data analysis Laser Photo Detector BS Xend mass Yend mass

  • Displacing mirror by actuator through digital control

system (injected signal to feedback loop)

  • We prepared and injected waveforms with our hands

and eyes in many processes->Automation

  • Injected waveforms : Sine-Gaussian, Supernova

numerical simulations, NSNS, BHBH->Investigation

Overview of iKAGRA HWI test

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SLIDE 4

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Importance of HWI test

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(1) An additional check of the h(t) calibration (2) Test of search and parameter estimation analysis (3) A method to check for cross-couplings to the detector output channels (4) (Blind injection) We need to start preparation toward the future bKAGRA HWI test

  • To be automation HWI test
  • Effective h(t) calibration check waveform
  • Plan with considering actuator and cryo-payload model
  • Investigating physical waveform injection
  • Investigating HWI test with photon calibrator
  • Phys. Rev. D 95, 062002 (2017)
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SLIDE 5

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Importance of HWI test

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So, we will plan to investigate / inject following waveforms; (1) Check the accuracy/confirmation of h(t) reconstruction

  • Sign, amplitude, phase, time delay, lack of filters, …
  • Measurement of open loop transfer function (and its time variation)
  • Continuous sine, Swept sine, Sine Gaussian, Pulse signal, …

(2) Waveforms which can describe analytically

  • Systematic uncertainty study of search and parameter estimation program
  • Effective One body, IMRFenom, TaylorT4, …
  • Inspiral signal (Post Newtonian Approximation)

(3) Complex waveforms

  • Numerical simulation of NS-NS merger, supernovae, cosmic strings, …
  • Waveforms with modified gravity
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SLIDE 6

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Effective h(t) calibration check

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We should know what frequency will be important for precise calibration

  • Dominant frequency to be reconstructed (v_err or v_fb?)
  • Unity gain frequency
  • Performance of lower frequency (proportional to f^-2?)

https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=30440

After fixed (or 1st proposed) the actuation model and cryo-payload model, we start investigation what amplitude, frequency, Q value Sine-Gaussians are important.

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SLIDE 7

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Effective h(t) calibration check

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There are many important physics in higher frequency (>1kHz)

  • Hyper massive neutron star oscillation (depend on EoS)
  • g-mode oscillation of supernova proto-neutron star
  • etc…

long duration continuous sine(>1min) injection will be necessary. (in LIGO O2 case, ~3min injection was performed in 1000.1-5000.1Hz)

Slide from Yuzurihara-san arXiv:1310.8290

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SLIDE 8

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Investigating physical waveform injection

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I want to contact to other data analysis and theoretical people CBC : EOB?, IMRFenom?, TaylorT4?, all?, modified gravity waveform? Mass, spin, start frequency, … Discussion with Narikawa-san Supernova : Core bounce, convection, SASI, memory effect, etc… Continuous : Discussed later Other : Cosmic string, stochastic gravitational wave, …

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SLIDE 9

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

HWI test with photon calibrator

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KAGRA Photon calibrator and its displacement performance. This study was done to confirm the KAGRA Pcal laser power

Design slide by Y.Inoue

  • Photon calibrator displacement

P_power : laser power c : light speed

  • Force-to-length transfer function, no geometric

error, higher frequency

  • KAGRA Photon calibrator

P_power : 20[W] (Assume ±5[W] for displacement) M (end test mass) : 22.8[kg] θ (angle btw laser and mirror) : 0.72[deg]

  • Displacement performance

3.7 × 10−11/f 2[m]

Maximum displacement by KAGRA Pcal

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SLIDE 10

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

HWI test with photon calibrator

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Sensitivity curve for each bKAGRA phase after installing photon calibrator (Given by Somiya-san) Preliminary?

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SLIDE 11

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Pcal HWI test : continuous sine wave

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The maximum SNR when all laser power use to unique frequency SNR depends on observation time; proportional to sqrt(T) 2018.11 2019.11 2020.02 2020.08 2018.11 2019.11 2020.02 2020.08

  • KAGRA Pcal max
  • 1s integration
  • 10s integration
  • 100s integration
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SLIDE 12

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Pcal HWI test : CBC waveform

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NS-NS 20Mpc BH-BH 20Mpc

  • SNR from inspiral waveform

for each phase We can inject detectable NS-NS binary waveforms after achieving 1e-22[/rHz] sensitivity

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SLIDE 13

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Pcal HWI test : continuous wave

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Under investigating, what type of continuous signals are interesting? Evaluate minimum injection amplitude by KAGRA Pcal.

  • Phys. Rev. D 95, 062002 (2017)
  • Ex. LIGO

15 types of CW signals are injected (makefakedata), evaluate amplitude and phase

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SLIDE 14

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Discussion

  • Welcome any ideas about hardware injection!
  • What type of CBC waveforms are important
  • SEOBNR(v1 v2 v3), IMFPhenom(A B), SpinTaylorT4? all injection?
  • Mass, mass ratio, spin?
  • Modified gravity?
  • GW obtained from numerical simulation
  • NS-NS merger, supernovae
  • Other important physical waveform?

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SLIDE 15

The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration

Summary

  • We started the investigation and discussion toward bKAGRA Hardware

Injection test

  • To be automation HWI test
  • Effective h(t) calibration check
  • physical waveform injection
  • investigating HWI test with photon calibrator
  • after achieved 1e-22[/rHz]@100Hz, we can inject observable NS-NS

binary waveforms, easier to inject higher mass waveforms(BBH)

  • Welcome any ides about hardware injection.

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