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Time Delay Interferometry and LISA Optimal Sensitivity

A. Pai·K. Rajesh Nayak·S. V. Dhurandhar·J-Y. Vinet
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Abstract

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.

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A. Pai, K. Rajesh Nayak, S. V. Dhurandhar, J-Y. Vinet. 2003-06-13. Time Delay Interferometry and LISA Optimal Sensitivity. https://arxiv.org/abs/gr-qc/0306057

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