Precision alignment of the LIGO 4 km arms using the dual - frequency differential global positioning system
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چکیده
The alignment of the Laser Interferometer Gravitational-wave Observatory (LIGO) using the Global Positioning System (GPS) is described. The LIGO project is designed to detect gravitational waves from astrophysical sources by laser interferometry. There are two sites separated by 3002 km that will be operated in coincidence. At each, site laser beams propagate in two orthogonal 4 km long evacuated beam lines 1.2 meters in diameter. The subject of this article is the alignment of the 16 km of beam tubes using dual-frequency differential GPS. A maximum deviation from straightness in inertial space of 5 mm rms and an orthogonality between arm pairs of better than 5 microradians is reported.
منابع مشابه
Precision alignment of the LIGO 4 km arms using dual - frequency differential GPS
The alignment of the Laser Interferomter Gravitational-wave Observatory (LIGO) using the Global Positioning System (GPS) is described. The LIGO project is designed to detect gravitational waves from astrophysical sources by laser interferometery. There are two sites separated by 3002 km that will be operated in coincidence. At each, site laser beams propagate in two orthogonal 4 km long evacuat...
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تاریخ انتشار 2001