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arXiv 2012.06485gr-qcastro-ph.IMphysics.space-ph
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MICROSCOPE任务:统计故障对弱等效原理测试的影响

MICROSCOPE mission: Statistics and impact of glitches on the test of the weak equivalence principle

Joel Bergé, Quentin Baghi, Alain Robert, Manuel Rodrigues, Bernard Foulon, Emilie Hardy, Gilles Métris, Sandrine Pires, Pierre Touboul

摘要:

MICROSCOPE对弱等效原理(WEP)的空间测试是基于对两个测试质量在绕地球轨道运行时所经历的加速度差的微小测量。违反WEP的检测将出现在公知的频率$f_{\rm EP}$上,这取决于卫星的轨道和旋转频率。因此,对实验进行了优化,以最大限度地减少$f_{\rm EP}$的系统误差。小故障是在测试质量的测量加速度中可见的短暂事件,最有可能起源于卫星涂层的裂缝。在本文中,我们描述了它们的形状和时间分布。虽然本质上是随机的,但它们的到达时间分布受到轨道和旋转周期的调制。它们对必须量化的WEP测试有影响。然而,现有的数据使我们无法明确地处理这一任务。我们表明,毛刺影响测试的WEP,一个先验的未知水平。因此,丢弃扰动数据是减少其影响的最佳方法。

英文摘要:

MICROSCOPE's space test of the weak equivalence principle (WEP) is based on the minute measurement of the difference of accelerations experienced by two test masses as they orbit the Earth. A detection of a violation of the WEP would appear at a well-known frequency $f_{\rm EP}$ depending on the satellite's orbital and spinning frequencies. Consequently, the experiment was optimised to miminise systematic errors at $f_{\rm EP}$. Glitches are short-lived events visible in the test masses' measured acceleration, most likely originating in cracks of the satellite's coating. In this paper, we characterise their shape and time distribution. Although intrinsically random, their time of arrival distribution is modulated by the orbital and spinning periods. They have an impact on the WEP test that must be quantified. However, the data available prevents us from unequivocally tackling this task. We show that glitches affect the test of the WEP, up to an a priori unknown level. Discarding the perturbed data is thus the best way to reduce their effect.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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