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In the TianQin project, the caging and release technology of the test mass is one of the key technologies. The test mass will be released to free fall for the science phase in space. The residual release impulse is required to be on the order of magnitude of 1 \(\times \) 10 \(^{-5}\) kg m/s. In this work, the release impulse of the test mass is proposed to be measured with a compound pendulum for the TianQin project, and the expected uncertainty is on the order of magnitude of 1.1 \(\times 10^{-7}\) kg m/s. The electrostatic feedback control of the pendulum is used to reduce the nonlinear effect of the pendulum.

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Measurement Scheme of Release Impulse Based on a Compound Pendulum for the TianQin Project

  • 会议论文

  • 发表日期：

    2025年

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  • Lingling Yang,
  • Xin Li,
  • Yongqi Liu,
  • Wencan Li,
  • Qing Li

摘要

In the TianQin project, the caging and release technology of the test mass is one of the key technologies. The test mass will be released to free fall for the science phase in space. The residual release impulse is required to be on the order of magnitude of 1 \(\times \) 10 \(^{-5}\) kg m/s. In this work, the release impulse of the test mass is proposed to be measured with a compound pendulum for the TianQin project, and the expected uncertainty is on the order of magnitude of 1.1 \(\times 10^{-7}\) kg m/s. The electrostatic feedback control of the pendulum is used to reduce the nonlinear effect of the pendulum.