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Baseline (geophysical) interferometer 2010.9.27 Plan

Baseline (geophysical) interferometer 2010.9.27 Plan 1. Two baseline-monitor interferometers (~2.5km) along LCGT 2. Sensors and benchmarks for monitoring environmental condition Purpose and Targets [Baseline interferometers]

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Baseline (geophysical) interferometer 2010.9.27 Plan

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  1. Baseline (geophysical) interferometer2010.9.27 • Plan • 1. Two baseline-monitor interferometers (~2.5km) along LCGT • 2. Sensors and benchmarks for monitoring environmental condition • Purpose and Targets • [Baseline interferometers] • 1. Baseline monitor for LCGT (Tides, earthquakes, crustal deformation…in the middle of Niigata Kobe Tectonic Zone) • 2. Fault-creep monitor for the Atotsu fault • 3. Deep interior of Earth (Monitoring Earth’s free oscillations) • [Sensors and Benchmarks] • Monitoring environmental condition (Thermometers, Barometers, Hygrometers, Broadband seismometers, and Accelerometers) and tunnel deformation (leveling and surveying) • Standard of length (collaboration with AIST) • Benchmarks for vacuum installation

  2. Baseline Interferometers along LCGT

  3. A 2500-m baseline interferometerand a 5-m input baseline

  4. Layout of vacuum system and benchmarks Strain sensitivity ~1e-13 Baseline ~2.5km Chamber diameter 1000mm Chamber height 800mm Vacuum pressure ~1e-4Pa Benchmarks 800x800mm, 200-m separation Sensors Temperature (laser, chamber, vault) Barometer (chamber, vault) Hygrometers (laser) Broadband seismometer (vault) Accelerometer (laser, chamber)

  5. Layout of center chamber

  6. Schedule 2011.10-2013.3 Laser assemble (partially) 2011.10-2013.3 Optics assemble (partially) 2012.11-2013.3 Benchmark, vacuum installation (2nd tunnel) 2013.3-2013.7 Benchmark, vacuum installation (1st tunnel) 2013.4-2013.9 Laser and optics installation 2013.4-2013.9 Data acq. sys. Installation 2013.10-2014.3 Observation

  7. Budget FY2011 89.1Myen Laser @10Myen x3 30Myen Retro mirror @10M x4 40M Optics @ x2 FY2012 792.0M Chamber @ x4 Duct @ x(3~5)km Vac. pump @ x10 Vac. misc. @ x4 Benchmark @ x30 Data acq. @ x1

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