| Autor: |
M Tröbs, S Schuster, M Lieser, M Zwetz, M Chwalla, K Danzmann, G Fernández Barránco, E D Fitzsimons, O Gerberding, G Heinzel, C J Killow, M Perreur-Lloyd, D I Robertson, T S Schwarze, G Wanner, H Ward |
| Předmět: |
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| Zdroj: |
Classical & Quantum Gravity; 5/24/2018, Vol. 35 Issue 10, p1-1, 1p |
| Abstrakt: |
Objects sensed by laser interferometers are usually not stable in position or orientation. This angular instability can lead to a coupling of angular tilt to apparent longitudinal displacement—tilt-to-length coupling (TTL). In LISA this is a potential noise source for both the test mass interferometer and the long-arm interferometer. We have experimentally investigated TTL coupling in a setup representative for the LISA test mass interferometer and used this system to characterise two different imaging systems (a two-lens design and a four-lens design) both designed to minimise TTL coupling. We show that both imaging systems meet the LISA requirement of ±25 μm rad−1 for interfering beams with relative angles of up to ±300 μrad. Furthermore, we found a dependency of the TTL coupling on beam properties such as the waist size and location, which we characterised both theoretically and experimentally. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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