![Keiko Kokeyama BSc, MSc, PhD, FHEA](https://profiles-cardiff.imgix.net/attachments/4420?w=200&h=200&auto=format&crop=faces&fit=crop&q=90")
Dr Keiko Kokeyama
(hi/ei)
BSc, MSc, PhD, FHEA
- Ar gael fel goruchwyliwr ôl-raddedig
Timau a rolau for Keiko Kokeyama
Uwch Ddarlithydd
Sefydliad Archwilio Disgyrchiant
Trosolwyg
Rwy'n ffisegydd arbrofol mewn gwyddoniaeth synhwyrydd tonnau disgyrchiant. Ers canfod tonnau disgyrchiant cyntaf o uno twll du deuaidd yn 2015, ac yna uno seren niwtron yn 2017, mae wedi bod yn oes aur astroffiseg tonnau disgyrchiant. Mae'r synwyryddion tonnau disgyrchiant yn interferomedrau laser i ganfod ystumiadau gofod-amser a achosir gan donnau disgyrchiant, sy'n dod o rywle yn y bydysawd. Oherwydd bod ystumiadau gofod-amser yn fach iawn, fel arfer gorchymyn o 10^(-21) m (0.000...21 sero... 001 m, un miliyfed o ddiamedr proton), mae'r synwyryddion tonnau disgyrchiant yn hynod sensitif, mor fanwl ag y mae terfyn ansicrwydd Heisenberg yn caniatáu. Gweithiais ar ddau synhwyrydd ar raddfa fawr, y synhwyrydd LIGO Livingston a'r synhwyrydd KAGRA, i wneud i'r synhwyrydd weithio a gwella'r sensitifrwydd i redeg yr arsylwadau astroffisegol. Oherwydd bod yn rhaid i'r offerynnau fod yn sensitif iawn, mae llawer o dechnolegau o'r radd flaenaf yn cael eu datblygu a'u gweithredu. Ar hyn o bryd, yng Nghaerdydd, rwy'n gweithio ar dechnolegau newydd i wneud synwyryddion y dyfodol yn fwy sensitif. Rydyn ni eisiau arsylwi mwy o nifer o uniadau twll du neu sêr niwtron o hyd yn oed y bydysawd tad.
Ewch i'n gwefan i gael rhagor o wybodaeth: https://exp.gravity.cf.ac.uk/
Cyhoeddiad
2024
- Abac, A. G. et al. 2024. A search using GEO600 for gravitational waves coincident with fast radio bursts from SGR 1935+2154. The Astrophysical Journal 977(2), article number: 255. (10.3847/1538-4357/ad8de0)
- Wang, H. et al. 2024. Characterization of birefringence inhomogeneity of KAGRA sapphire mirrors from transmitted wavefront error measurements. Physical Review D (particles, fields, gravitation, and cosmology) 110(8), article number: 82007. (10.1103/physrevd.110.082007)
- Abac, A. G. et al. 2024. Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo. The Astrophysical Journal 973(2), article number: 132. (10.3847/1538-4357/ad65ce)
- Abac, A. et al. 2024. Ultralight vector dark matter search using data from the KAGRA O3GK run. Physical Review D (particles, fields, gravitation, and cosmology) 110(4), article number: 42001. (10.1103/physrevd.110.042001)
- Abbott, R. et al. 2024. Search for gravitational-lensing signatures in the full third observing run of the LIGO–Virgo network. Astrophysical Journal 970(191) (10.3847/1538-4357/ad3e83)
- Abac, A. G. et al. 2024. Observation of gravitational waves from the coalescence of a 2.5–4.5 M ⊙ compact object and a neutron star. The Astrophysical Journal Letters 970(2), article number: L34. (10.3847/2041-8213/ad5beb)
- Abbott, R. et al. 2024. Search for gravitational-wave transients associated with magnetar bursts in Advanced LIGO and Advanced Virgo data from the third observing run. The Astrophysical Journal 966(1), article number: 137. (10.3847/1538-4357/ad27d3)
- Fletcher, C. et al. 2024. A joint Fermi-GBM and Swift-BAT analysis of Gravitational-wave candidates from the third Gravitational-wave Observing Run. The Astrophysical Journal 964(2), article number: 149. (10.3847/1538-4357/ad1eed)
- Sakai, Y. et al. 2024. Training process of unsupervised learning architecture for gravity spy dataset. Annalen der Physik 536(2), article number: 2200140. (10.1002/andp.202200140)
2023
- Abbott, R. et al. 2023. Open Data from the Third Observing Run of LIGO, Virgo, KAGRA, and GEO. Astrophysical Journal Supplement 267(2), article number: 29. (10.3847/1538-4365/acdc9f)
- Abbott, R. et al. 2023. Constraints on the cosmic expansion history from GWTC–3. Astrophysical Journal 949(2), article number: 76. (10.3847/1538-4357/ac74bb)
- Abe, H. et al. 2023. Noise subtraction from KAGRA O3GK data using Independent Component Analysis. Classical and Quantum Gravity 40(8), article number: 85015. (10.1088/1361-6382/acc0cb)
- Akutsu, T. et al. 2023. Input optics systems of the KAGRA detector during O3GK. Progress of Theoretical and Experimental Physics 2023(2), article number: 023F01. (10.1093/ptep/ptac166)
2022
- Abbott, R. et al. 2022. Model-based cross-correlation search for gravitational waves from the low-mass x-ray binary scorpius x-1 in ligo o3 data. Astrophysical Journal Letters 941(2), article number: L30. (10.3847/2041-8213/aca1b0)
- Fairhurst, S. et al. 2022. All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data. Physical Review D 106(10) (10.1103/PhysRevD.106.102008)
- Abe, H. et al. 2022. Performance of the KAGRA detector during the first joint observation with GEO 600 (O3GK). Progress of Theoretical and Experimental Physics, article number: ptac093. (10.1093/ptep/ptac093)
- Abe, H. et al. 2022. The current status and future prospects of KAGRA, the large-scale cryogenic gravitational wave telescope built in the Kamioka underground. Galaxies 10(3), article number: 63. (10.3390/galaxies10030063)
- Sakai, Y. et al. 2022. Unsupervised learning architecture for classifying the transient noise of interferometric gravitational-wave detectors. Scientific Reports 12(1), article number: 9935. (10.1038/s41598-022-13329-4)
- Abbott, R. et al. 2022. Searches for gravitational waves from known pulsars at two harmonics in the second and third LIGO-Virgo observing runs. Astrophysical Journal 935(1), article number: 1. (10.3847/1538-4357/ac6acf)
- Abbott, R. et al. 2022. Search for gravitational waves associated with gamma-ray bursts detected by Fermi and Swift during the LIGO-Virgo Run O3b. Astrophysical Journal 928(2), article number: 186. (10.3847/1538-4357/ac532b)
- Abbott, R. et al. 2022. Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo. Astronomy & Astrophysics 659, article number: A84. (10.1051/0004-6361/202141452)
- Abbott, R. et al. 2022. Constraints on dark photon dark matter using data from LIGO's and Virgo's third observing run. Physical Review D 105(6), article number: 63030. (10.1103/PhysRevD.105.063030)
2021
- Abbott, R. et al. 2021. All-sky search for short gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run. Physical Review D 104, article number: 122004. (10.1103/PhysRevD.104.122004)
- Akutsu, T. et al. 2021. Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer. Progress of Theoretical and Experimental Physics 2021(5), article number: 05A102. (10.1093/ptep/ptab018)
- Kawamura, S. et al. 2021. Current status of space gravitational wave antenna DECIGO and B-DECIGO. Progress of Theoretical and Experimental Physics 2021(5), article number: 05A105. (10.1093/ptep/ptab019)
- Akutsu, T. et al. 2021. Overview of KAGRA: KAGRA science. Progress of Theoretical and Experimental Physics 2021(5), article number: 05A103. (10.1093/ptep/ptaa120)
- Akutsu, T. et al. 2021. Overview of KAGRA: Detector design and construction history. Progress of Theoretical and Experimental Physics 2021(5), article number: 05A101. (10.1093/ptep/ptaa125)
- Akutsu, T. et al. 2021. Radiative cooling of the thermally isolated system in KAGRA gravitational wave telescope. Journal of Physics: Conference Series 1857(1), article number: 12002. (10.1088/1742-6596/1857/1/012002)
2020
- Yamada, R. et al. 2020. Optimization of quantum noise by completing the square of multiple interferometer outputs in quantum locking for gravitational wave detectors. Physics Letters A 384(26), article number: 126626. (10.1016/j.physleta.2020.126626)
- Abbott, B. P. et al. 2020. Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA. Living Reviews in Relativity 23(1), article number: 3. (10.1007/s41114-020-00026-9)
- Zhu, Z. -. et al. 2020. Application of independent component analysis to the iKAGRA data. Progress of Theoretical and Experimental Physics 2020(5), article number: 053F01. (10.1093/ptep/ptaa056)
- Akutsu, T. et al. 2020. An arm length stabilization system for KAGRA and future gravitational-wave detectors. Classical and Quantum Gravity 37(3), article number: 35004. (10.1088/1361-6382/ab5c95)
2019
- Yamamoto, K. et al. 2019. Design and experimental demonstration of a laser modulation system for future gravitational-wave detectors. Classical and Quantum Gravity 36(20), article number: 205009. (10.1088/1361-6382/ab4489)
- Akiyama, Y. et al. 2019. Vibration isolation system with a compact damping system for power recycling mirrors of KAGRA. Classical and Quantum Gravity 36(9), article number: 95015. (10.1088/1361-6382/ab0fcb)
- KAGRA collaboration, . and Kokeyama, K. 2019. KAGRA: 2.5 generation interferometric gravitational wave detector. Nature Astronomy 3(1), pp. 35-40. (10.1038/s41550-018-0658-y)
2018
- Kokeyama, K. et al. 2018. Demonstration for a two-axis interferometric tilt sensor in KAGRA. Physics Letters A 382(29), pp. 1950-1955. (10.1016/j.physleta.2018.05.004)
- Akutsu, T. et al. 2018. Construction of KAGRA: an underground gravitational-wave observatory. Progress of Theoretical and Experimental Physics 2018(1), article number: 013F01. (10.1093/ptep/ptx180)
2016
- Abbott, B. P. et al. 2016. GW150914: the advanced LIGO detectors in the era of first discoveries. Physical Review Letters 116(13), article number: 131103. (10.1103/PhysRevLett.116.131103)
- Abbott, B. P. et al. 2016. Astrophysical implications of the binary black hole merger GW150914. Astrophysical Journal Letters 818(2), article number: L22. (10.3847/2041-8205/818/2/L22)
- Abbott, B. P. et al. 2016. Observation of gravitational waves from a binary black hole merger. Physical Review Letters 116(6), article number: 61102. (10.1103/PhysRevLett.116.061102)
- Mueller, C. L. et al. 2016. The advanced LIGO input optics. Review of Scientific Instruments 87(1), article number: 14502. (10.1063/1.4936974)
2015
- Evans, M. et al. 2015. Observation of Parametric Instability in Advanced LIGO. Physical Review Letters 114(16), article number: 161102. (10.1103/PhysRevLett.114.161102)
2014
- Staley, A. et al. 2014. Achieving resonance in the advanced LIGO gravitational-wave interferometer. Classical and Quantum Gravity 31(24), article number: 245010. (10.1088/0264-9381/31/24/245010)
- Kokeyama, K., Izumi, K., Korth, W. Z., Smith-Lefebvre, N., Arai, K. and Adhikari, R. X. 2014. Residual amplitude modulation in interferometric gravitational wave detectors. Journal of the Optical Society of America A 31(1), pp. 81-88. (10.1364/JOSAA.31.000081)
2013
- Lodhia, D., Brown, D., Brückner, F., Carbone, L., Fulda, P., Kokeyama, K. and Freise, A. 2013. Interferometer phase noise due to beam misalignment on diffraction gratings. Optics Express 21(24), pp. 29578-29591. (10.1364/OE.21.029578)
2012
- Fulda, P. et al. 2012. Review of the Laguerre-Gauss mode technology research program at Birmingham. Presented at: 9th Edoardo Amaldi Conference and Numerical Relativity - Data Analysis Meeting (Amaldi 9/NRDA 2011), Cardiff, Wales, 10-15 July 2011, Vol. 363. IOP Publishing: Conference Series pp. 12010., (10.1088/1742-6596/363/1/012010)
2011
- Bond, C., Fulda, P., Carbone, L., Kokeyama, K. and Freise, A. 2011. Higher order Laguerre-Gauss mode degeneracy in realistic, high finesse cavities. Physical Review D - Particles, Fields, Gravitation and Cosmology 84(10), article number: 102002. (10.1103/PhysRevD.84.102002)
2010
- Somiya, K., Kokeyama, K. and Nawrodt, R. 2010. Remarks on thermoelastic effects at low temperatures and quantum limits in displacement measurements. Physical Review D, Particles and fields 63(8), article number: 127101. (10.1103/PHYSREVD.82.127101)
- Fulda, P., Kokeyama, K., Chelkowski, S. and Freise, A. 2010. Experimental demonstration of higher-order Laguerre-Gauss mode interferometry. Physical Review D - Particles, Fields, Gravitation and Cosmology 82(1), article number: 12002. (10.1103/PhysRevD.82.012002)
2009
- Kokeyama, K., Sato, S., Nishizawa, A., Kawamura, S., Chen, Y. and Sugamoto, A. 2009. Development of a displacement- and frequency-noise-free interferometer in a 3D configuration for gravitational wave detection. Physical Review Letters 103, article number: 171101. (10.1103/PhysRevLett.103.171101)
2008
- Kokeyama, K., Somiya, K., Kawazoe, F., Sato, S., Kawamura, S. and Sugamoto, A. 2008. Development of a signal-extraction scheme for resonant sideband extraction. Classical and Quantum Gravity 25(23), article number: 235013. (10.1088/0264-9381/25/23/235013)
- Sato, S. et al. 2008. Demonstration of displacement-noise-free interferometry using bi-directional Mach-Zehnder interferometers. Classical and Quantum Gravity 25(11), article number: 114031. (10.1088/0264-9381/25/11/114031)
- Kokeyama, K. et al. 2008. The experimental plan of displacement- and frequency-noise free laser interferometer. Presented at: The Seventh Edoardo Amaldi Conference On Gravitational Waves (amaldi7), Sydney, Australia, 8-14 July 2007, Vol. 122. IOP Publishing: Conference Series, (10.1088/1742-6596/122/1/012022)
2007
- Sato, S., Kawamura, S., Kokeyama, K., Kawazoe, F. and Somiya, K. 2007. Diagonalization of the length sensing matrix of a dual recycled laser interferometer gravitational wave antenna. Physical Review D - Particles, Fields, Gravitation and Cosmology 75(8), article number: 82004. (10.1103/PhysRevD.75.082004)
- Sato, S., Kokeyama, K., Ward, R. L., Kawamura, S., Chen, Y., Pai, A. and Somiya, K. 2007. Demonstration of displacement- and frequency-noise-free laser interferometry using bidirectional Mach-Zehnder Interferometers. Physical Review Letters 98(14), article number: 141101. (10.1103/PhysRevLett.98.141101)
2006
- Chen, Y. et al. 2006. Interferometers for displacement-noise-free gravitational-wave detection. Physical Review Letters 97(15), article number: 151103. (10.1103/PhysRevLett.97.151103)
- Kokeyama, K., Sato, S., Kawazoe, F., Somiya, K., Fukushima, M., Kawamura, S. and Sugamoto, A. 2006. Downselect of the signal extraction scheme for LCGT. Journal of Physics: Conference Series 32, article number: 65. (10.1088/1742-6596/32/1/065)
- Kawazoe, F. et al. 2006. The experimental plan of the 4m resonant sideband extraction prototype for the LCGT. Journal of Physics: Conference Series 32, pp. 380-385., article number: 58. (10.1088/1742-6596/32/1/058)
- Sato, S., Kokeyama, K., Kawazoe, F., Somiya, K. and Kawamura, S. 2006. Diagonalizing sensing matrix of broadband RSE. Journal of Physics: Conference Series 32, pp. 470-475., article number: 72. (10.1088/1742-6596/32/1/072)
Cynadleddau
- Fulda, P. et al. 2012. Review of the Laguerre-Gauss mode technology research program at Birmingham. Presented at: 9th Edoardo Amaldi Conference and Numerical Relativity - Data Analysis Meeting (Amaldi 9/NRDA 2011), Cardiff, Wales, 10-15 July 2011, Vol. 363. IOP Publishing: Conference Series pp. 12010., (10.1088/1742-6596/363/1/012010)
- Kokeyama, K. et al. 2008. The experimental plan of displacement- and frequency-noise free laser interferometer. Presented at: The Seventh Edoardo Amaldi Conference On Gravitational Waves (amaldi7), Sydney, Australia, 8-14 July 2007, Vol. 122. IOP Publishing: Conference Series, (10.1088/1742-6596/122/1/012022)
Erthyglau
- Abac, A. G. et al. 2024. A search using GEO600 for gravitational waves coincident with fast radio bursts from SGR 1935+2154. The Astrophysical Journal 977(2), article number: 255. (10.3847/1538-4357/ad8de0)
- Wang, H. et al. 2024. Characterization of birefringence inhomogeneity of KAGRA sapphire mirrors from transmitted wavefront error measurements. Physical Review D (particles, fields, gravitation, and cosmology) 110(8), article number: 82007. (10.1103/physrevd.110.082007)
- Abac, A. G. et al. 2024. Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo. The Astrophysical Journal 973(2), article number: 132. (10.3847/1538-4357/ad65ce)
- Abac, A. et al. 2024. Ultralight vector dark matter search using data from the KAGRA O3GK run. Physical Review D (particles, fields, gravitation, and cosmology) 110(4), article number: 42001. (10.1103/physrevd.110.042001)
- Abbott, R. et al. 2024. Search for gravitational-lensing signatures in the full third observing run of the LIGO–Virgo network. Astrophysical Journal 970(191) (10.3847/1538-4357/ad3e83)
- Abac, A. G. et al. 2024. Observation of gravitational waves from the coalescence of a 2.5–4.5 M ⊙ compact object and a neutron star. The Astrophysical Journal Letters 970(2), article number: L34. (10.3847/2041-8213/ad5beb)
- Abbott, R. et al. 2024. Search for gravitational-wave transients associated with magnetar bursts in Advanced LIGO and Advanced Virgo data from the third observing run. The Astrophysical Journal 966(1), article number: 137. (10.3847/1538-4357/ad27d3)
- Fletcher, C. et al. 2024. A joint Fermi-GBM and Swift-BAT analysis of Gravitational-wave candidates from the third Gravitational-wave Observing Run. The Astrophysical Journal 964(2), article number: 149. (10.3847/1538-4357/ad1eed)
- Sakai, Y. et al. 2024. Training process of unsupervised learning architecture for gravity spy dataset. Annalen der Physik 536(2), article number: 2200140. (10.1002/andp.202200140)
- Abbott, R. et al. 2023. Open Data from the Third Observing Run of LIGO, Virgo, KAGRA, and GEO. Astrophysical Journal Supplement 267(2), article number: 29. (10.3847/1538-4365/acdc9f)
- Abbott, R. et al. 2023. Constraints on the cosmic expansion history from GWTC–3. Astrophysical Journal 949(2), article number: 76. (10.3847/1538-4357/ac74bb)
- Abe, H. et al. 2023. Noise subtraction from KAGRA O3GK data using Independent Component Analysis. Classical and Quantum Gravity 40(8), article number: 85015. (10.1088/1361-6382/acc0cb)
- Akutsu, T. et al. 2023. Input optics systems of the KAGRA detector during O3GK. Progress of Theoretical and Experimental Physics 2023(2), article number: 023F01. (10.1093/ptep/ptac166)
- Abbott, R. et al. 2022. Model-based cross-correlation search for gravitational waves from the low-mass x-ray binary scorpius x-1 in ligo o3 data. Astrophysical Journal Letters 941(2), article number: L30. (10.3847/2041-8213/aca1b0)
- Fairhurst, S. et al. 2022. All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data. Physical Review D 106(10) (10.1103/PhysRevD.106.102008)
- Abe, H. et al. 2022. Performance of the KAGRA detector during the first joint observation with GEO 600 (O3GK). Progress of Theoretical and Experimental Physics, article number: ptac093. (10.1093/ptep/ptac093)
- Abe, H. et al. 2022. The current status and future prospects of KAGRA, the large-scale cryogenic gravitational wave telescope built in the Kamioka underground. Galaxies 10(3), article number: 63. (10.3390/galaxies10030063)
- Sakai, Y. et al. 2022. Unsupervised learning architecture for classifying the transient noise of interferometric gravitational-wave detectors. Scientific Reports 12(1), article number: 9935. (10.1038/s41598-022-13329-4)
- Abbott, R. et al. 2022. Searches for gravitational waves from known pulsars at two harmonics in the second and third LIGO-Virgo observing runs. Astrophysical Journal 935(1), article number: 1. (10.3847/1538-4357/ac6acf)
- Abbott, R. et al. 2022. Search for gravitational waves associated with gamma-ray bursts detected by Fermi and Swift during the LIGO-Virgo Run O3b. Astrophysical Journal 928(2), article number: 186. (10.3847/1538-4357/ac532b)
- Abbott, R. et al. 2022. Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo. Astronomy & Astrophysics 659, article number: A84. (10.1051/0004-6361/202141452)
- Abbott, R. et al. 2022. Constraints on dark photon dark matter using data from LIGO's and Virgo's third observing run. Physical Review D 105(6), article number: 63030. (10.1103/PhysRevD.105.063030)
- Abbott, R. et al. 2021. All-sky search for short gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run. Physical Review D 104, article number: 122004. (10.1103/PhysRevD.104.122004)
- Akutsu, T. et al. 2021. Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer. Progress of Theoretical and Experimental Physics 2021(5), article number: 05A102. (10.1093/ptep/ptab018)
- Kawamura, S. et al. 2021. Current status of space gravitational wave antenna DECIGO and B-DECIGO. Progress of Theoretical and Experimental Physics 2021(5), article number: 05A105. (10.1093/ptep/ptab019)
- Akutsu, T. et al. 2021. Overview of KAGRA: KAGRA science. Progress of Theoretical and Experimental Physics 2021(5), article number: 05A103. (10.1093/ptep/ptaa120)
- Akutsu, T. et al. 2021. Overview of KAGRA: Detector design and construction history. Progress of Theoretical and Experimental Physics 2021(5), article number: 05A101. (10.1093/ptep/ptaa125)
- Akutsu, T. et al. 2021. Radiative cooling of the thermally isolated system in KAGRA gravitational wave telescope. Journal of Physics: Conference Series 1857(1), article number: 12002. (10.1088/1742-6596/1857/1/012002)
- Yamada, R. et al. 2020. Optimization of quantum noise by completing the square of multiple interferometer outputs in quantum locking for gravitational wave detectors. Physics Letters A 384(26), article number: 126626. (10.1016/j.physleta.2020.126626)
- Abbott, B. P. et al. 2020. Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA. Living Reviews in Relativity 23(1), article number: 3. (10.1007/s41114-020-00026-9)
- Zhu, Z. -. et al. 2020. Application of independent component analysis to the iKAGRA data. Progress of Theoretical and Experimental Physics 2020(5), article number: 053F01. (10.1093/ptep/ptaa056)
- Akutsu, T. et al. 2020. An arm length stabilization system for KAGRA and future gravitational-wave detectors. Classical and Quantum Gravity 37(3), article number: 35004. (10.1088/1361-6382/ab5c95)
- Yamamoto, K. et al. 2019. Design and experimental demonstration of a laser modulation system for future gravitational-wave detectors. Classical and Quantum Gravity 36(20), article number: 205009. (10.1088/1361-6382/ab4489)
- Akiyama, Y. et al. 2019. Vibration isolation system with a compact damping system for power recycling mirrors of KAGRA. Classical and Quantum Gravity 36(9), article number: 95015. (10.1088/1361-6382/ab0fcb)
- KAGRA collaboration, . and Kokeyama, K. 2019. KAGRA: 2.5 generation interferometric gravitational wave detector. Nature Astronomy 3(1), pp. 35-40. (10.1038/s41550-018-0658-y)
- Kokeyama, K. et al. 2018. Demonstration for a two-axis interferometric tilt sensor in KAGRA. Physics Letters A 382(29), pp. 1950-1955. (10.1016/j.physleta.2018.05.004)
- Akutsu, T. et al. 2018. Construction of KAGRA: an underground gravitational-wave observatory. Progress of Theoretical and Experimental Physics 2018(1), article number: 013F01. (10.1093/ptep/ptx180)
- Abbott, B. P. et al. 2016. GW150914: the advanced LIGO detectors in the era of first discoveries. Physical Review Letters 116(13), article number: 131103. (10.1103/PhysRevLett.116.131103)
- Abbott, B. P. et al. 2016. Astrophysical implications of the binary black hole merger GW150914. Astrophysical Journal Letters 818(2), article number: L22. (10.3847/2041-8205/818/2/L22)
- Abbott, B. P. et al. 2016. Observation of gravitational waves from a binary black hole merger. Physical Review Letters 116(6), article number: 61102. (10.1103/PhysRevLett.116.061102)
- Mueller, C. L. et al. 2016. The advanced LIGO input optics. Review of Scientific Instruments 87(1), article number: 14502. (10.1063/1.4936974)
- Evans, M. et al. 2015. Observation of Parametric Instability in Advanced LIGO. Physical Review Letters 114(16), article number: 161102. (10.1103/PhysRevLett.114.161102)
- Staley, A. et al. 2014. Achieving resonance in the advanced LIGO gravitational-wave interferometer. Classical and Quantum Gravity 31(24), article number: 245010. (10.1088/0264-9381/31/24/245010)
- Kokeyama, K., Izumi, K., Korth, W. Z., Smith-Lefebvre, N., Arai, K. and Adhikari, R. X. 2014. Residual amplitude modulation in interferometric gravitational wave detectors. Journal of the Optical Society of America A 31(1), pp. 81-88. (10.1364/JOSAA.31.000081)
- Lodhia, D., Brown, D., Brückner, F., Carbone, L., Fulda, P., Kokeyama, K. and Freise, A. 2013. Interferometer phase noise due to beam misalignment on diffraction gratings. Optics Express 21(24), pp. 29578-29591. (10.1364/OE.21.029578)
- Bond, C., Fulda, P., Carbone, L., Kokeyama, K. and Freise, A. 2011. Higher order Laguerre-Gauss mode degeneracy in realistic, high finesse cavities. Physical Review D - Particles, Fields, Gravitation and Cosmology 84(10), article number: 102002. (10.1103/PhysRevD.84.102002)
- Somiya, K., Kokeyama, K. and Nawrodt, R. 2010. Remarks on thermoelastic effects at low temperatures and quantum limits in displacement measurements. Physical Review D, Particles and fields 63(8), article number: 127101. (10.1103/PHYSREVD.82.127101)
- Fulda, P., Kokeyama, K., Chelkowski, S. and Freise, A. 2010. Experimental demonstration of higher-order Laguerre-Gauss mode interferometry. Physical Review D - Particles, Fields, Gravitation and Cosmology 82(1), article number: 12002. (10.1103/PhysRevD.82.012002)
- Kokeyama, K., Sato, S., Nishizawa, A., Kawamura, S., Chen, Y. and Sugamoto, A. 2009. Development of a displacement- and frequency-noise-free interferometer in a 3D configuration for gravitational wave detection. Physical Review Letters 103, article number: 171101. (10.1103/PhysRevLett.103.171101)
- Kokeyama, K., Somiya, K., Kawazoe, F., Sato, S., Kawamura, S. and Sugamoto, A. 2008. Development of a signal-extraction scheme for resonant sideband extraction. Classical and Quantum Gravity 25(23), article number: 235013. (10.1088/0264-9381/25/23/235013)
- Sato, S. et al. 2008. Demonstration of displacement-noise-free interferometry using bi-directional Mach-Zehnder interferometers. Classical and Quantum Gravity 25(11), article number: 114031. (10.1088/0264-9381/25/11/114031)
- Sato, S., Kawamura, S., Kokeyama, K., Kawazoe, F. and Somiya, K. 2007. Diagonalization of the length sensing matrix of a dual recycled laser interferometer gravitational wave antenna. Physical Review D - Particles, Fields, Gravitation and Cosmology 75(8), article number: 82004. (10.1103/PhysRevD.75.082004)
- Sato, S., Kokeyama, K., Ward, R. L., Kawamura, S., Chen, Y., Pai, A. and Somiya, K. 2007. Demonstration of displacement- and frequency-noise-free laser interferometry using bidirectional Mach-Zehnder Interferometers. Physical Review Letters 98(14), article number: 141101. (10.1103/PhysRevLett.98.141101)
- Chen, Y. et al. 2006. Interferometers for displacement-noise-free gravitational-wave detection. Physical Review Letters 97(15), article number: 151103. (10.1103/PhysRevLett.97.151103)
- Kokeyama, K., Sato, S., Kawazoe, F., Somiya, K., Fukushima, M., Kawamura, S. and Sugamoto, A. 2006. Downselect of the signal extraction scheme for LCGT. Journal of Physics: Conference Series 32, article number: 65. (10.1088/1742-6596/32/1/065)
- Kawazoe, F. et al. 2006. The experimental plan of the 4m resonant sideband extraction prototype for the LCGT. Journal of Physics: Conference Series 32, pp. 380-385., article number: 58. (10.1088/1742-6596/32/1/058)
- Sato, S., Kokeyama, K., Kawazoe, F., Somiya, K. and Kawamura, S. 2006. Diagonalizing sensing matrix of broadband RSE. Journal of Physics: Conference Series 32, pp. 470-475., article number: 72. (10.1088/1742-6596/32/1/072)
Ymchwil
Mae fy niddordebau ymchwil yn dod o fewn maes gwyddoniaeth synhwyrydd ar gyfer astroffiseg tonnau disgyrchiant.
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Datblygu synhwyrydd birefringence newydd
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Modelu synhwyro a rheoli uwch ar gyfer interferometers yr effeithir arnynt yn thermol
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Gweithredu drychau adlewyrchiad newidiol yn seiliedig ar effaith etalon
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Archwilio o systemau iawndal thermol amgen ar gyfer synwyryddion tonnau disgyrchiant y genhedlaeth nesaf
Am ragor o wybodaeth, ewch i wefan ein grŵp arbrofol: https://exp.gravity.cf.ac.uk/
Addysgu
Ymunwch â'm dosbarthiadau a phrosiectau tonnau disgyrchiant!
2024-25
- Technegau mewn Mesur Manwl (PXT906)
- Ffiseg Arbrofol (PXT1150)
- Prosiect Ffiseg MSC (PXT999)
2021-22, 2022-23, 2023-24
- Ffiseg Tonnau Disgyrchiant Arbrofol II (PXT902)
- Ffiseg Arbrofol (PXT1150)
- Prosiect Ffiseg (PXT3315 a 3350)
- Prosiect Ffiseg MSC (PXT999)
2021-22
- Ffiseg Tonnau Disgyrchiant Arbrofol II (PXT902)
Bywgraffiad
Aelodaethau proffesiynol
- Cydweithrediad Gwyddonol LIGO (2009 - 2014, 2021 - cyfredol)
- Cydweithrediad KAGRA (2015 - Cyfredol)
- Cynghreiriaid Disgyrchiant (2024 - Cyfredol)
- Bwrdd Cyngres Wyddonol KAGRA (2021 - 2023)
Safleoedd academaidd blaenorol
- 2024 - Cyfredol: Athro Cysylltiol, Prifysgol Nagoya, Japan (50% yn croesbenodi â Phrifysgol Caerdydd).
- 2024 - Cyfredol: Uwch Ddarlithydd, Prifysgol Caerdydd, y DU.
- 2021 - 2023: Darlithydd, Prifysgol Caerdydd, y DU.
- 2017 - 2021: Athro Cynorthwyol, Sefydliad Ymchwil Pelydrau Cosmig, Prifysgol Tokyo, Japan
- 2015 - 2017: Athro Cynorthwyol Prosiect, Sefydliad Ymchwil Pelydrau Cosmig, Prifysgol Tokyo, Japan
- 2011 - 2015: Ymchwilydd ôl-ddoethurol, Prifysgol Talaith Louisiana, UDA.
- 2009 - 2011: Ymchwilydd ôl-ddoethurol, Prifysgol Birmingham, y DU.
Contact Details
KokeyamaK@caerdydd.ac.uk
+44 29225 14051
Adeiladau'r Frenhines, Llawr 2, Ystafell N / 2.13, 5 The Parade, Heol Casnewydd, Caerdydd, CF24 3AA
+44 29225 14051
Adeiladau'r Frenhines, Llawr 2, Ystafell N / 2.13, 5 The Parade, Heol Casnewydd, Caerdydd, CF24 3AA
