Jia-Hao Xu

Sep 3, 2024 | link.aps.org | Jia-Hao Xu |Quzhou College |Qi Liu |Lin Zhu

In the TianQin space-based gravitational wave (GW) detection mission, the measurement of remanent magnetic moment (m→) of the kilogram-level test mass is a prerequisite before the launch. Current measurement methods have shown a measured deviation since the assumption of a uniform distribution of m→ in the test mass volume, and the unconsidered interference from ambient magnetic fields. We develop a new torsion pendulum with a modulated 2D Helmholtz coils to measure the m→.