Mainz 2026 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 39: Poster – Precision Measurement (joint session Q/A)

A 39.1: Poster

Donnerstag, 5. März 2026, 17:00–19:00, Philo 2. OG

Optical simulations for noise analyses in space-based interferometers — •Rodrigo Garcia Alvarez — Max Planck institute for Gravitational Physics (Albert Einstein Institute), Hannover, Germany

A major contributor of noise in the Laser Interferometer Space Antenna (LISA) is the so-called tilt-to-length coupling (TTL). This is the path length signal noise induced by angular and lateral jitters in an interferometric setup. Various TTL noise simulations conducted using IfoCAD, an in-house interferometry c++ library are presented. These simulations include TTL noise in the test mass interferometers and the inter-satellite interferometers, caused by the jitter of the transmitting and receiving spacecraft. The status of IfoCAD simulations using LISA's latest optical design is included.

Keywords: LISA; Interferometry; Tilt-to-length coupling; Optical simulations