The sensitivity of LISA depends on the suppression of several noise sources; dominant one is laser frequency noise. It has been shown that the six Doppler data streams obtained from three space-crafts can be appropriately time delayed and optimally combined to cancel this laser frequency noise. We show that the optimal data combinations when operated in a network mode improves the sensitivity over Michelson ranging from 40 % to 100 %. In this article, we summarize these results. We further show that the residual laser noise in the optimal data combination due to typical arm-length inaccuracy of 200 m is much below the level of optical path and the proof mass noises.
@article{arxiv.gr-qc/0306057,
title = {Time Delay Interferometry and LISA Optimal Sensitivity},
author = {A. Pai and K. Rajesh Nayak and S. V. Dhurandhar and J-Y. Vinet},
journal= {arXiv preprint arXiv:gr-qc/0306057},
year = {2007}
}
Comments
LaTeX, 6 pages, 4 figures, To appear in Proceedings of XXXVIIIth Recontres de Moriond: Gravitational Waves and Experimental Gravity