Magnetic coupling to the Advanced Virgo payloads and its impact on the low frequency sensitivity

Understand

We study the electromagnetic coupling of the Advanced Virgo (AdV) Input Mirror Payload (IMP) in response to a slowly time-varying magnetic field.

• As the problem is not amenable to analytical solution, we employ and validate a finite element (FE) analysis approach.
• The FE model is built to represent as faithfully as possible the real object and it has been validated by comparison with experimental measurements.
• The intent is to estimate the induced currents and the magnetic field in the neighbourhood of the payload.