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” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Contents 2 • (reminder) iKAGRA Hardware Injection • Toward the bKAGRA Hardware Injection • toward next bKAGRA run • Hardware Injection with Photon calibrator • (discussion) Injection waveform • Summary
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Xend mass numerical simulations, NSNS, BHBH->Investigation - Injected waveforms : Sine-Gaussian, Supernova and eyes in many processes->Automation - We prepared and injected waveforms with our hands system (injected signal to feedback loop) - Displacing mirror by actuator through digital control Yend mass BS Hardware Injection test (HWI test) Photo Detector Laser data transfer, data analysis - detector response, digital control, data acquisition system, signal calibration, inject the gravitational wave - To displace end mirror (by actuator or photon radiation pressure), we quasi- - One of the important end-to-end test 3 Overview of iKAGRA HWI test
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Importance of HWI test 4 (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)
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Importance of HWI test 5 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
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Effective h(t) calibration check 6 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.
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Effective h(t) calibration check 7 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
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Investigating physical waveform injection 8 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, …
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration HWI test with photon calibrator - Displacement performance θ (angle btw laser and mirror) : 0.72[deg] M (end test mass) : 22.8[kg] P_power : 20[W] (Assume ±5[W] for displacement) - KAGRA Photon calibrator error, higher frequency - Force-to-length transfer function, no geometric c : light speed P_power : laser power - Photon calibrator displacement Design slide by Y.Inoue This study was done to confirm the KAGRA Pcal laser power KAGRA Photon calibrator and its displacement performance. 9 Maximum displacement by KAGRA Pcal 3 . 7 × 10 − 11 /f 2 [m]
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration HWI test with photon calibrator 10 Sensitivity curve for each bKAGRA phase after installing photon calibrator (Given by Somiya-san) Preliminary?
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Pcal HWI test : continuous sine wave 11 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
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Pcal HWI test : CBC waveform 12 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
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration Pcal HWI test : continuous wave 13 Under investigating, what type of continuous signals are interesting? Evaluate minimum injection amplitude by KAGRA Pcal. Ex. LIGO 15 types of CW signals are injected (makefakedata), evaluate amplitude and phase Phys. Rev. D 95, 062002 (2017)
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration • Other important physical waveform? • NS-NS merger, supernovae • GW obtained from numerical simulation • Modified gravity? Mass, mass ratio, spin? Discussion • SEOBNR(v1 v2 v3), IMFPhenom(A B), SpinTaylorT4? all injection? • What type of CBC waveforms are important • Welcome any ideas about hardware injection! • 14
The 3rd KIW “Toward bKAGRA Hardware Injection” May.21-22,2017 Takaaki Yokozawa, CAL collaboration physical waveform injection Welcome any ides about hardware injection. • binary waveforms, easier to inject higher mass waveforms(BBH) after achieved 1e-22[/rHz]@100Hz, we can inject observable NS-NS • investigating HWI test with photon calibrator • • Summary Effective h(t) calibration check • To be automation HWI test • Injection test We started the investigation and discussion toward bKAGRA Hardware • 15
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