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Progress towards a space-borne quantum gravity gradiometer

Show simple item record Yu, Nan Kohel, James M. Ramerez-Serrano, Jaime Kellogg, James R. Lim, Lawrence Maleki, Lute 2006-04-12T18:15:58Z 2006-04-12T18:15:58Z 2004-06-22
dc.identifier.citation Earth Science Technology Conference (ESTC), Palo Alto, Calfornia, June 22, 2004. en
dc.identifier.clearanceno 04-1576
dc.description.abstract Abstract-Quantum interferometer gravity gradiometer for 3D mapping is a project for developing the technology of atom interferometer-based gravity sensor in space. The atom interferometer utilizes atomic particles as free fall test masses to measure inertial forces with unprecedented sensitivity and precision. It also allows measurements of the gravity gradient tensor components for 3D mapping of subsurface mass distribution. The overall approach is based on recent advances of laser cooling and manipulation of atoms in atomic and optical physics. Atom interferometers have been demonstrated in research laboratories for gravity and gravity gradient measurements. In this approach, atoms are first laser cooled to micro-kelvin temperatures. Then they are allowed to freefall in vacuum as true drag-free test masses. During the free fall, a sequence of laser pulses is used to split and recombine the atom waves to realize the interferometric measurements. We have demonstrated atom interferometer operation in the Phase I period, and we are implementing the second generation for a complete gradiometer demonstration unit in the laboratory. Along with this development, we are developing technologies at component levels that will be more suited for realization of a space instrument. We will present an update of these developments and discuss the future directions of the quantum gravity gradiometer project en
dc.description.sponsorship NASA/JPL en
dc.format.extent 662443 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004. en
dc.subject quantum gravity en
dc.subject gradiometer en
dc.subject laser cooling en
dc.subject atom interferometer en
dc.title Progress towards a space-borne quantum gravity gradiometer en
dc.type Preprint en

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