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ID: 374038.0, MPI für Gravitationsphysik / Laser Interferometry & Gravitational Wave Astronomy
LISA, the laser interferometer space antenna, requires the ultimate in lasers, clocks, and drag-free control
Authors:Rüdiger, Albrecht; Heinzel, Gerhard; Tröbs, Michael
Place of Publication:Berlin
Date of Publication (YYYY-MM-DD):2008
Title of Proceedings:Lasers, clocks and drag-free control : exploration of relativistic gravity in space
Start Page:427
End Page:455
Title of Series:Astrophysics and space science library
Volume (in Series):349
Name of Conference/Meeting:359th WE-Heraeus Seminar on Lasers, Clocks, and Drag-Free - New Technologies for Testing Relativistic Gravity in Space
Place of Conference/Meeting:Bremen, Germany
(Start) Date of Conference/Meeting
End Date of Conference/Meeting 
Review Status:not specified
Audience:Not Specified
Abstract / Description:The existence of gravitational waves is the most prominent of Einstein's predictions that has not yet been directly verified. The space project LISA shares its goal and principle of operation with the ground-based interferometers currently being operated, the detection and measurement of gravitational waves by laser interferometry. Ground and space detection differ in their frequency ranges, and thus in the detectable sources. Toward low frequencies, ground-based detection is limited by seismic noise, and yet more fundamentally by "gravity-gradient noise," thus covering the range from a few Hz on upward to a few kHz. It is only in space that detection of signals below, say, 1 Hz is possible, opening a wide window to a different class of interesting sources of gravitational waves. The project LISA consists of three spacecraft in heliocentric orbits, forming a triangle of 5 million km sides. A technology demonstrator, the LISA Pathfinder, designed to test vital LISA technologies, is to be launched by ESA in 2009.

LISA will face great challenges in reducing measurement noise, and thus, it will very strongly depend on the technologies of lasers, clocks, and drag-free control.
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Karsten Danzmann
Affiliations:MPI für Gravitationsphysik/Teilinstitut Hannover
MPI für Gravitationsphysik/Laser Interferometry & Gravitational Wave Astronomy
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