藉由重力場效校準器改進用於校正的不準度之誤差計算方法

Improvement of error estimation method for calibration uncertainty with gravity field calibrator

黃祥瑜(Huang Hsiang-Yu)

指導教授 ： 張嘉泓 ； 王子敬

國立臺灣師範大學/理學院/物理學系/碩士(2021年)

https://doi.org/10.6345/NTNU202101277

摘要

none

關鍵字

None

並列摘要

Calibration and detector characterization play important role in gravitational waves signal reconstruction from interferometer response. KAGRA, a newly gravitational wave detector in Japan, joined the third observation(O3), and also have joint observation with GEO600, called O3GK. In calibration, we use photon calibrator(PCAL) in KAGRA during the observation. PCAL push mirror by radiation pressure to characterize interferometer response. We plan to use gravity field calibrator(GCAL), a dynamic gravitational field generator in our calibration in near future. GCAL actuate the interferometer mirror by rotating multipole masses.
In this thesis, we proposed maximum likelihood method to crosscheck the error estimation independently. We characterize the operation of PCAL used in KAGRA in O3GK by signal demodulation to verify the stability of PCAL. For GCAL, we estimate the systematic error of two component, radius and mass in GCAL geometry by Monte Carlo simulation. In the end of this thesis, we proposed a new method with combination of above two calibration instruments. By estimating of the ratio of higher order harmonics in GCAL to PCAL calibration signal in specific frequency, we can reduce the systematic error of GCAL and error of calibration measurement. We also derive new formula for estimation of time-dependent correction factor(TDCFs) with GCAL for future application. However, the KAGRA Collaboration does not yet have consensus views on the results presented in this thesis.

並列關鍵字

KAGRA ； calibration ； gravity field calibrator ； photon calibrator ； maximum likelihood ； higher order harmonics ； demodulation ； gravitational wave

參考文獻

[1] Russell A. Hulse. “The discovery of the binary pulsar”. In: Rev. Mod. Phys. 66 (3 July 1994), pp. 699–710. doi: 10.1103/RevModPhys.66.699. url: https://link.aps.org/ doi/10.1103/RevModPhys.66.699.

[2] B. P. Abbott et al. “Observation of Gravitational Waves from a Binary Black Hole Merger”. In: Phys. Rev. Lett. 116 (6 Feb. 2016), p. 061102. doi: 10.1103/PhysRevLett. 116.061102. url: https://link.aps.org/doi/10.1103/PhysRevLett.116.061102.

[3] B. P. Abbott et al. “Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A”. In: The Astrophysical Journal 848.2 (Oct. 2017), p. L13. issn: 2041-8213. doi: 10.3847/2041-8213/aa920c. url: http://dx. doi.org/10.3847/2041-8213/aa920c.

[4] Stefano Valenti et al. “The Discovery of the Electromagnetic Counterpart of GW170817: Kilonova AT 2017gfo/DLT17ck”. In: The Astrophysical Journal 848.2 (Oct. 2017), p. L24. doi: 10.3847/2041-8213/aa8edf. url: https://doi.org/10.3847/2041-8213/ aa8edf.

[5] Samar Safi-Harb et al. Chandra X-ray Observations of the Neutron Star Merger GW170817: Thermal X-Ray Emission From a Kilonova Remnant? 2018. arXiv: 1812.11320 [astro-ph.HE].