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Gravitational Wave Detection in Space in China

Gravitational Wave Detection in Space in China. Yueliang Wu (UCAS) presented by Gang JIN Institute of Mechanics, CAS, Beijing 100190, P.R.China. On behalf of Gravitational Wave Detection Working Group, Chinese Academy of Sciences. 10 th LISA Symposium

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Gravitational Wave Detection in Space in China

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  1. Gravitational Wave Detection in Space in China Yueliang Wu (UCAS) presented by Gang JIN Institute of Mechanics, CAS, Beijing 100190, P.R.China On behalf of Gravitational Wave Detection Working Group, Chinese Academy of Sciences 10th LISA Symposium Gainesville, Fl., May 19-23, 2014

  2. Outline of Talk • Road-map of Chinese Mission • A preliminary mission design for China and its scientific case study • Brief Report on the status of ongoing development for the space gravitational wave detection program in CAS

  3. Working Group for Gravitational Wave Detection in Space, CAS Coordinators: • Yueliang Wu (University of Chinese Academy of Sciences) • Wenrui Hu, Gang Jin (National Microgravity Laboratory, Institute of Mechanics) Member Institutesparticipating in the group: • Academy of Mathematics and Systems Science, • Institute of Mechanics, • Institute of Physics, • Institute of Theoretical Physics, • Institute of high Energy Physics, • Nanjing Institute of Astronomy and Optics, • National Astronomical Observatory, • University of Chinese Academy of Sciences (UCAS) • University of Science and Technology of China (USTC) • Huazhong Univ. of Sci. & Tech.(HUST) • Wuhan Institute of Physics and Mathematics • Dongfanghong Satellite Co. Ltd

  4. Roadmap of Chinese Mission Dual Tracks of Development Develop a Chinese Mission Contribute 20% to eLISA • eGRACE as Application (evolving/extended/enlarged) earth Gravity Recovery And Climate Experiment • GWD-China Gravitational Wave Detection in China • Telescope, • part of inertial sensors, • optical bench, • Phasemeter, • escape orbit launcher, • others ...

  5. Roadmap of Chinese Mission • eGRACE (100 nm, 2013-2022) • Temporal variation of earth gravity field • and Test for main techniques of GWD • GWD-China (5pm,2013-2033) Space detection of GW

  6. Road-map of Chinese Mission eGRACE Mission (2013-2022) 2013-2015：eGRACE expound & prove • Science & application purpose • Technology research & development • Satellite platform 2016-2022：eGRACE design and launch Technology development and Engineering: • Laser interferometer; • Inertial sensors; • Dragfree control; • Accelerometer response; • Satellite task analysis and simulation • Data analysis and gravity inversion method

  7. Roadmap of Chinese Mission GWD-China Mission (2013-2033) 2013-2015：GWD-China preliminary mission design • Science purpose & Technology target • Dual Tracks of development & • Preliminary decision making 2016-2022：GWD-China mission expound & prove or prepare for contributing 20% to eLISA • Key technology research & development; • Science measurement study; • Theoretical study; • Data analysis; • Satellite platform simulation;

  8. Chinese Mission Study for GWD-China or 20% Contribution to eLISA (2016-2022) Key Technological Research & Development • Space optics; • Inertial sensors; • Dragfree technologies; • Telescope design; • Micro-thrusters........ Theoretical Studies: • Early structure formation study, EMRI, IMRI, BH • Cosmology, Fundamental law, • Data analysis, numerical relativity • Instrument modeling and error analysis • Drag free control loop ---

  9. GWD-ChinaDesign & Launch or Make 20% Contribution to eLISA (2023--2033) Follow the cooperation agreement between China and ESA to make 20% contribution to eLISA II. GWD-China development and design 2023-2027：Ground based prototype & engineering model installation 2028-2032：Develop flight loads 2033- ：Satellite launch & GWD

  10. eGRACE for Earth Science Mission & GWD-China Technology Test Design Expected range of key parameters for instrument design • Distance between two S/Cs: 50-100km • Altitude of orbit in relation to measurement sensitivity: 350-450km • Drag free control: 10-7~10-8 m/s2/Hz1/2 • Drag free performance — residual acceleration Accelerometer: 10-10 ~10-12 m/s2/Hz1/2 (0.1Hz) • Precision of laser metrology: μm ~ 100nm/Hz1/2 (0.1Hz) Prospective Science Drivers • Hydrology (especially in Asia) • Climate change • Seismology

  11. KBR: 10^-6m/s/ √Hz gradiometry： 10^-2E/√Hz laser： 10- 100nm/ √Hz GRACE, GOCE and eGRACE

  12. Preliminary Mission Design for China(2011-2013) Strain sensitivity GWD-China frequency Main scientific impacts • Intermediate-Mass-Ratio In-spirals in globular clusters • The Binary systems of Intermediate Mass Black Holes formed by Pop III stars Gong X, Xu S, Bai S, et al. A scientific case study of an advanced LISA mission[J]. Classical and Quantum Gravity, 2011, 28(9): 094012.

  13. Key Techniques Development Laser metrology Laser frequency stability (Inst. Of Mech.,CAS; HUST, Wuhan Inst. of Phys. and Math., CAS) Gravitational Reference Sensor Capacitance sensing (HUST) Drag-free control Thruster and DFC (Inst. of Mech., CAS; Dongfanghong Co. Ltd)

  14. LISA Symposium X, section LISA Experimental I, Tuesday, May 20th, 14:20-14:35 Laser Interferometer Development Institute of Mechanics/CAS Institute of Physics/CAS Wuhan Institute of Phys. & Math./CAS Huazhong University of Sci. & Tech. Isolated noises: • Thermal noise • Vibration noise • Electromagnetic noise Yu-Qiong L, Zi-Ren L, He-Shan L, et al. Chinese Physics Letters, 2012, 29(7): 079501.

  15. LISA Symposium X, section Interferometry and Optics, Thursday, May 22nd, 17:15-17:30 Phasemeter • DPLL Architecture • 2π μrad/√Hz @ (0.04 Hz - 10 Hz) • 4 Channels ADC input • 2 Channels DAC output Liu H S, Dong Y H, Li Y Q, et al. Review of Scientific Instruments, 2014, 85(2): 024503.

  16. LISA Symposium X, Poster Session Tuesday, May 20th, 15:45-17:30 Pointing control and phase locking Demonstration of beam pointing control scheme Demonstration of phase-locking, 1mW power

  17. School of Physics , HUST, China fiber d0=152 um frame & TM micro-operation platform Inertial sensor box Sensitive Direction turntable LISA Symposium X, section Related missions and future technologies, Thursday, May 22nd, 11:30 - 12:00 LISA Symposium X, section Gravitational Reference Sensors, Thursday, May 22nd, 17:15-17:30 Inertial Sensor Development in HUST Torsion Pendulum Sensitive to torque Torsion Balance Sensitive to direct force Require studying more DoFs simultaneously such as coupling.

  18. LISA Symposium X, section Related missions and future technologies, Thursday, May 22, 11:30 - 12:00 LISA Symposium X, section Gravitational Reference Sensors, Thursday, May 22, 17:15-17:30

  19. Experiments on Frequency Locking of Nd:YAG Lasers (neodymium-doped yttrium aluminum garnet; Nd:Y3Al5O12) Wuhan Inst. Of Phys. & Math., CAS

  20. Micro-Thruster--Institute of mechanics, CAS Field Emission Electric Propulsion (FEEP) Radio Frequency Ion Thrusters (RIT) • Mechanism research of FEEP; • Select gallium as propellant (Ga-FEEP) • Development of Ga-FEEP emitter; • Firing operation (8/10 successful ) • New emitter validation; • Design of RIT; Development of direct thruster stand • Complete the experimental prototype of Ga-FEEP & RIT micro-thruster • Direct Thrust Measurement; FEEP Test Facility Ignition of Ga- FEEP Direct Thruster Stand Design of RIT

  21. Coordinators of SGWD/CAS working group at CAS (2012) Y.L. Wu (Univ. of Chinese Academy of Sciences, UCAS), W.R. Huand Gang Jin (Institute of Mechanics). Members L.Q. Peng (Bureau of Basic Research Sciences), C.F. Qiao and Y.S. Pu (Univ. of Chinese Acad. of Sci.), R.Q. Lau (Institute of Applied Math.) , G. Jin and Q. Kang (Institute of Mechanics), Y.X. Nie and Z.Y. Wei (Institute of Physics), M. Li and Y.Z. Zhang (Institute of Theoretical Physics), S.N, Zhang (Institute of High Energy Physics) Z.L. Zhou and Y.T. Zhu (National Astronomy Observatory), M.S. Zhan and L.S. Chen (Wuhan Institute of Phys. & Math.) Z.B.Zhou (HUST) SGD Scientific Working Groups Working group of “Science of measurement”(conveners: Gang Jin, Z.B. Zhou, Z.H. Hu，also: Q. Kang, Y.X. Nie, Z.Y. Wei, L.S. Chen, M.S. Zhan ) Working group of “Astrophysical black holes”(conveners: S. N. Zhang, R. Spurzum, Z. L. Zou ) Working group of “EMRI”(convener: R.Q. Lau) Working group of “Tests of fundamental laws”(conveners: Yue-Liang Wu, Yuan-Zhong Zhang, Cong-Feng Qiao) Working group of “Cosmology”(conveners: Miao Li, Yun-Song Piao) Working group of “Ultra‐compact binaries”(conveners: S.N. Zhang) Working group of “Data analysis”(convener: R.Q. Lau)

  22. Thank you! In our quest for truth, the road stretches endless ahead, seemingly countless study to bemade. Yet we continue our search, everywhere, above and beneath. Qu Yuan (屈原，343–278 BC)

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