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Titel |
Next-generation Lunar Laser Retroreflectors for Precision Tests of General Relativity |
VerfasserIn |
Emanuele Ciocci, Simone Dellagnello, Giovanni Delle Monache, Manuele Martini, Stefania Contessa, Luca Porcelli, Mattia Tibuzzi, Lorenzo Salvatori, Giordano Patrizi, Mauro Maiello, Nicola Intaglietta, Chiara Mondaini, Douglas Currie, John Chandler, Giuseppe Bianco, Tom Murphy |
Konferenz |
EGU General Assembly 2016
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Medientyp |
Artikel
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Sprache |
en
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 18 (2016) |
Datensatznummer |
250127249
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Publikation (Nr.) |
EGU/EGU2016-7103.pdf |
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Zusammenfassung |
Since 1969, Lunar Laser Ranging (LLR) to the Apollo Cube Corner Retroreflectors (CCRs)
has supplied almost all significant tests of General Relativity (GR). When first installed in the
1970s, the Apollo CCRs geometry contributed only a negligible fraction of the
ranging error budget. Today, because of lunar librations, this contribution dominates
the error budget, limiting the precision of the experimental tests of gravitational
theories.
The new MoonLIGHT-2 (Moon Laser Instrumentation for General relativity
High-accuracy Tests) apparatus is a new-generation LLR payload developed by the SCF_Lab
(http://www.lnf.infn.it/esperimenti/etrusco/) at INFN-LNF in collaboration with the
Maryland University. With the unique design of a single large CCR unaffected by librations,
MoonLIGHT-2 can increase up to a factor 100 the precision of the measurement of the
lunar geodetic precession and other General Relativity (GR) tests respect to Apollo
CCRs.
MoonLIGHT-2 is approved to be launched with the Moon Express mission MEX-1 and
will be deployed on the Moon surface in 2018. MoonLIGHT-2 is also proposed for the
Roscosmos mission Luna-27.
To validate/optimize MoonLIGHT-2 for MEX-1, the SCF_Lab is carrying out a unique
experimental test called SCF-Test: the concurrent measurement of the optical Far
Field Diffraction Pattern (FFDP) and the temperature distribution of the CCR under
thermal conditions produced with a close-match solar simulator and simulated space
environment.
We perform test of GR with current LLR data and also different GR simulation of the
expected improvement in GR test provided by MoonLIGHT-2, using the Planetary Ephemeris
Program in collaboration with CfA.
Our ultimate goal is to improve GR tests by a factor up to 100, and provide constraints on
the new gravitational theories like non-miminally coupled gravity and spacetime torision. |
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