Tetrahedral omnidirectional full-tensor gravitational wave detector
Tetrahedral omnidirectional full-tensor gravitational wave detector
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DOI：
10.1088/1361-6382/ac902d
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发表时间：
2022-09
影响因子：
3.5
通讯作者：
Zachary Metzler;C. Collins;H. Paik;P. Shawhan
中科院分区：
文献类型：
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作者：
Zachary Metzler;C. Collins;H. Paik;P. Shawhan
我们提出了一种新的四面体配置的三轴惯性传感器，其信号结合时创建一个各向同性的引力波的灵敏度。与先前研究的TIGA和超导全向引力辐射天文台设计的六个测试质量（TM）相比，这种安排仅使用四个测试质量（TM）提供了全天空覆盖和重力梯度的全张量测量。由于重力偏差，很难在所有三个方向上弱悬挂TM，因此我们还提供了仅测量水平位移情况下的方向灵敏度图。该天线方向图不再是各向同性的，并且导致功率的最大灵敏度与最小灵敏度的比率为2：1。在这种情况下，如果平台与地面倾斜充分隔离，则仍然可以重建全部重力梯度张量。
We propose a new tetrahedral configuration of three-axis inertial sensors, whose signals when combined create an isotropic sensitivity to gravitational waves. This arrangement provides total sky coverage and full-tensor measurements of the gravity gradient using only four test masses (TMs), compared to the six TMs of the previously studied TIGA and superconducting omnidirectional gravitational radiation observatory designs. Since weakly suspending a TM in all three directions is difficult due to the gravity bias, we also present the directional sensitivity plot for the case where only horizontal displacements are measured. This antenna pattern is no longer isotropic, and results in a maximum sensitivity to minimum sensitivity ratio of 2:1 in power. The full gravity gradient tensor can in this case still be reconstructed if the platform is sufficiently isolated from ground tilt.