TL;DR
This paper discusses the technical challenges and solutions for long-arm interferometry in LISA, a space-based gravitational wave observatory measuring tiny distance fluctuations over millions of kilometers.
Contribution
It introduces the specific technical challenges of long-arm measurements in LISA and details the developed techniques to address them.
Findings
Identified key challenges in long-arm interferometry for LISA.
Developed techniques to improve measurement accuracy over millions of kilometers.
Addressed noise reduction and signal stability in space-based measurements.
Abstract
The Laser Interferometer Space Antenna (LISA) will observe gravitational radiation in the milliHertz band by measuring picometer-level fluctuations in the distance between drag-free proof masses over baselines of approximately five million kilometers. The measurement over each baseline will be divided into three parts: two short-arm measurements between the proof masses and a fiducial point on their respective spacecraft, and a long-arm measurement between fiducial points on separate spacecraft. This work focuses on the technical challenges associated with these long-arm measurements and the techniques that have been developed to overcome them.
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Taxonomy
TopicsRadio Astronomy Observations and Technology · Particle accelerators and beam dynamics · Particle Accelerators and Free-Electron Lasers