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What’s hidden in the mantle?

What’s hidden in the mantle?. Seismically slow “red” regions in the deep mantle. Can we image it with geonus ?. Core – Mantle Boundary. Retsima et al (Science, 1990). An experiment with joint interests in Physics, Geology, and Security. Hanohano. Size: scalable from 1 to 50 kT

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What’s hidden in the mantle?

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  1. What’s hidden in the mantle? Seismically slow “red” regions in the deep mantle Can we image it with geonus? Core – Mantle Boundary Retsima et al (Science, 1990)

  2. An experiment with joint interests in Physics, Geology, and Security Hanohano Size: scalable from 1 to 50 kT 10-yr cost est: $250M @ 10 kT • multiple deployments • deep water cosmic shield • control-able L/E detection A Deep Ocean e Electron Anti-Neutrino Observatory Deployment Sketch Descent/ascent 39 min

  3. Engineering StudiesMakai Ocean Engineering • Studied vessel design up to 100 kilotons, based upon cost, stability, and construction ease. • Construct in shipyard • Fill/test in port • Tow to site, can traverse Panama Canal • Deploy ~4-5 km depth • Recover, repair or relocate, and redeploy Barge 112 m long x 23.3 wide Deployment Sketch Descent/ascent 39 min

  4. Addressing Technology Issues 20m x 35m fiducial vol. • Scintillating oil studies in lab • P=450 atm, T=0°C • Testing PC, PXE, LAB and dodecane • No problems so far, LAB favorite… optimization needed • Implosion studies • Design with energy absorption • Computer modeling & at sea • No stoppers • Power and comm, no problems • Optical detector, prototypes OK • Need second round design 1 m oil 2m pure water

  5. Testing Earth Models Šrámek et al, 2012, EPSL

  6. Predicted geoneutrino flux Total flux at surface dominated by Continental crust Yu Huang et al (2013) G-cubed arXiv:1301.0365 Mantle flux at the surface dominated by deep mantle structures Šrámek et al (2013) EPSL 10.1016/j.epsl.2012.11.001; arXiv:1207.0853

  7. Ocean based experiment! • Neutrino Tomography…  - Pacific Transect • Avoid continents • 4 km depth deployments • Map out the Earth’s interior • Test the models Šrámek et al (2013) EPSL arXiv:1207.0853

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