arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1203.4476astro-ph.IMgr-qcphysics.ins-detphysics.opticsphysics.space-ph
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LISA技术包干涉仪中试验质量角噪声的扣除

Subtraction of test mass angular noise in the LISA Technology Package interferometer

Felipe Guzmán Cervantes, Frank Steier, Gudrun Wanner, Gerhard Heinzel, Karsten Danzmann

摘要:

我们提出了最近的灵敏度测量的LISA技术包干涉仪与关节镜作为测试质量,由压电换能器驱动。已经证明了所需的纵向位移分辨率为9 pm/sqrt[Hz],高于3 mHz,角噪声对应于在轨操作中的预期。通过将角度干涉测量数据流拟合到纵向位移测量值,完全减去了该测试质量抖动对灵敏位移读数的过量噪声贡献。因此,这种交叉耦合不构成对LISA技术封装干涉测量所需性能的限制。

英文摘要:

We present recent sensitivity measurements of the LISA Technology Package interferometer with articulated mirrors as test masses, actuated by piezo-electric transducers. The required longitudinal displacement resolution of 9 pm/sqrt[Hz] above 3 mHz has been demonstrated with an angular noise that corresponds to the expected in on-orbit operation. The excess noise contribution of this test mass jitter onto the sensitive displacement readout was completely subtracted by fitting the angular interferometric data streams to the longitudinal displacement measurement. Thus, this cross-coupling constitutes no limitation to the required performance of the LISA Technology Package interferometry.

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