Initial results from the LIGO Newtonian calibrator
Initial results from the LIGO Newtonian calibrator
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DOI：
10.1103/physrevd.104.082006
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发表时间：
2021-06
影响因子：
5
通讯作者：
M. Ross;T. Mistry;L. Datrier;J. Kissel;K. Venkateswara;C. Weller;K. Kumar;C. Hagedorn;E. Adelberger;John Lee;E. Shaw;P. Thomas;D. Barker;F. Clara;B. Gateley;T. Guidry;E. Daw;M. Hendry;J. Gundlach
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文献类型：
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作者：
M. Ross;T. Mistry;L. Datrier;J. Kissel;K. Venkateswara;C. Weller;K. Kumar;C. Hagedorn;E. Adelberger;John Lee;E. Shaw;P. Thomas;D. Barker;F. Clara;B. Gateley;T. Guidry;E. Daw;M. Hendry;J. Gundlach
LIGO引力波观测站应变读数的精确校准对于引力波事件的准确解释至关重要。这种校准传统上是通过辐射压力在观测台的测试质量上施加已知的力来完成的。在这里，我们描述了一个替代的校准方案的实施：牛顿校准。该系统使用一个由四极和六极质量分布组成的转子，在天文台的一个测试质量上施加随时间变化的引力。由该转子产生的力可以预测为相对不确定度<1\%$，并且在观测站的读数中得到很好的解决。该系统目前用作现有绝对校准系统的交叉检查。
The precise calibration of the strain readout of the LIGO gravitational wave observatories is paramount to the accurate interpretation of gravitational wave events. This calibration is traditionally done by imparting a known force on the test masses of the observatory via radiation pressure. Here we describe the implementation of an alternative calibration scheme: the Newtonian Calibrator. This system uses a rotor consisting of both quadrupole and hexapole mass distributions to apply a time-varying gravitational force on one of the observatory's test masses. The force produced by this rotor can be predicted to $<1\%$ relative uncertainty and is well-resolved in the readout of the observatory. This system currently acts as a cross-check of the existing absolute calibration system.