航天器和行星际贡献对磁性环境在板载丽莎探路者

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航天器和行星际贡献对磁性环境在板载丽莎探路者

Spacecraft and interplanetary contributions to the magnetic environment on-board LISA Pathfinder

论文作者

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M-S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D. I., Roma-Dollase, D., Russano, G., Slutsky, J., Sopuerta, C. F., Sumner, T., Telloni, D., Texier, D., Thorpe, J. I., Trenkel, C., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Wealthy, D., Weber, W. J., Wissel, L., Wittchen, A., Zweifel, P.

论文摘要

Lisa Pathfinder（LPF）是一项基于空间的任务，旨在测试新技术，这是空间中引力波观测站所需的新技术。磁性驱动力在低频制度（MHz及以下）的仪器敏感性中起关键作用，这是空间基天文台感兴趣的测量带。磁场可以将测试质量的磁化率与磁性敏感性和剩余的磁矩相结合，并从地球运动中打扰它们。 Lisa Pathfinder在板上带有专用磁性测量子系统，其噪声水平为10 $ \ rm nt \ hz^{ - 1/2} $从1 Hz向下降至1 MHz。在本文中，我们报告了整个Lisa探路者操作的磁性测量结果。我们表征了航天器中的磁性环境，研究磁场的时间演变及其稳定性降至20 $μ$ Hz，在其中，我们测量的值左右左右200美元左右，nt \ rm nt \ hz^{ - 1/2} $，并识别两个不同的频率制度，一种与磁场磁场有关，与磁场内部磁场和Spacecececececececececepacecececraft。最后，我们表征了MHz下方磁场波动的非平稳分量，并将它们与太阳风的动力学联系起来。

LISA Pathfinder (LPF) has been a space-based mission designed to test new technologies that will be required for a gravitational wave observatory in space. Magnetically driven forces play a key role in the instrument sensitivity in the low-frequency regime (mHz and below), the measurement band of interest for a space-based observatory. The magnetic field can couple to the magnetic susceptibility and remanent magnetic moment from the test masses and disturb them from their geodesic movement. LISA Pathfinder carried on-board a dedicated magnetic measurement subsystem with noise levels of 10 $ \rm nT \ Hz^{-1/2}$ from 1 Hz down to 1 mHz. In this paper we report on the magnetic measurements throughout LISA Pathfinder operations. We characterise the magnetic environment within the spacecraft, study the time evolution of the magnetic field and its stability down to 20 $μ$Hz, where we measure values around 200 $ \rm nT \ Hz^{-1/2}$ and identify two different frequency regimes, one related to the interplanetary magnetic field and the other to the magnetic field originating inside the spacecraft. Finally, we characterise the non-stationary component of the fluctuations of the magnetic field below the mHz and relate them to the dynamics of the solar wind.

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