Unwanted, coherent signals in the LISA bandwidth due to test mass charging
Unwanted, coherent signals in the LISA bandwidth due to test mass charging
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DOI：
10.1088/0264-9381/21/5/038
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发表时间：
2004-02
影响因子：
3.5
通讯作者：
D. Shaul;T. Sumner;H. Araújo;G. Rochester;P. Wass;C. Lee
中科院分区：
文献类型：
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作者：
D. Shaul;T. Sumner;H. Araújo;G. Rochester;P. Wass;C. Lee
由于来自宇宙射线和太阳的粒子辐射，电荷将在丽莎测试质量上积聚。这种充电可以通过洛伦兹和库仑相互作用产生虚假的力。由于测试质量上积累的电荷量的时间依赖性，这些效应不仅会产生加速噪声，还会在丽莎带宽中产生不需要的相干信号。这些不需要的相干信号的幅度取决于几个因素，包括充电速率、最大允许电荷、放电过程和传感器本身的许多设计参数。本文估计这种不必要的充电信号的幅度的基础上的电流，标称LTP传感器的尺寸和讨论的方法，可以采取大幅减少他们的丽莎。
Electrical charges will build up on the LISA test masses due to particle radiation from cosmic rays and from the Sun. This charging can lead to spurious forces both through Lorentz and Coulomb interactions. These effects can give rise not only to acceleration noise, but also to unwanted coherent signals in the LISA bandwidth, due to the time dependence of the amount of charge accumulated on a test mass. The amplitude of these unwanted coherent signals depends on several factors, including the charging rate, the maximum allowed charge, the discharge procedure and a number of design parameters of the sensor itself. This paper estimates the magnitude of such unwanted charging signals based on the current, nominal LTP sensor dimensions and discusses approaches that may be taken to substantially reduce them for LISA.