Gravitational Wave Detection in Space in China

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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
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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

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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 Institutes participating 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

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Dual Tracks of Development
Roadmap of Chinese Mission

• 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 ...

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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

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Road-map of Chinese Mission
eGRACE Mission (2013-2022)

• 2013-2015eGRACE expound prove
• Science application purpose
• Technology research development
• Satellite platform

• 2016-2022eGRACE design and launch
• Technology development
  and Engineering
• Laser interferometer
• Inertial sensors
• Drag free control
• Accelerometer response
• Satellite task analysis and simulation
• Data analysis and gravity inversion method

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Roadmap of Chinese Mission
GWD-China Mission (2013-2033)

• 2013-2015GWD-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

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Chinese Mission Study for GWD-China or 20
Contribution to eLISA (2016-2022)

• Key Technological Research Development
• Space optics
• Inertial sensors
• Drag free 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
• ---

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GWD-China Design 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
2023-2027Ground based prototype engineering
model installation
2028-2032Develop flight loads 2033-
Satellite launch GWD
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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 10-710-8 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

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GRACE, GOCE and eGRACE
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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 missionJ. Classical
and Quantum Gravity, 2011, 28(9) 094012.
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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)

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LISA Symposium X, section LISA Experimental I,
Tuesday, May 20th, 1420-1435
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.
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LISA Symposium X, section Interferometry and
Optics, Thursday, May 22nd, 1715-1730
Phasemeter

• DPLL Architecture
• 2p µrad/vHz _at_ (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.
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LISA Symposium X, Poster Session Tuesday, May
20th, 1545-1730
Pointing control and phase locking
Demonstration of beam pointing control scheme
Demonstration of phase-locking, 1mW power
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LISA Symposium X, section Related missions and
future technologies, Thursday, May 22nd, 1130 -
1200 LISA Symposium X, section Gravitational
Reference Sensors, Thursday, May 22nd, 1715-1730
Inertial Sensor Development in HUST
Require studying more DoFs simultaneously such as
coupling.
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LISA Symposium X, section Related missions and
future technologies, Thursday, May 22, 1130 -
1200 LISA Symposium X, section Gravitational
Reference Sensors, Thursday, May 22, 1715-1730
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Experiments on Frequency Locking of NdYAG
Lasers (neodymium-doped yttrium aluminum garnet
NdY3Al5O12)
Wuhan Inst. Of Phys. Math., CAS
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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
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• Coordinators of SGWD/CAS working group at CAS
  (2012)
• Y.L. Wu (Univ. of Chinese Academy of Sciences,
  UCAS),
• W.R. Hu and 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)

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Thank you!
In our quest for truth, the road stretches
endless ahead, seemingly countless study to be
made. Yet we continue our search, everywhere,
above and beneath.
Qu Yuan (??,343278 BC)