Low frequency thermal stability of the TianQin inertial sensor

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-04-12 DOI:10.1016/j.icheatmasstransfer.2025.108960

Fulong Wei , Xiaobing Luo , Shaobo Qu , Li Liu , Xingyu Yan , Yupeng Zhou , Xin Zhao , Jinlong Ma , Zebing Zhou

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Abstract

Temperature fluctuation is a major disturbance for the space-based gravitational wave detectors, especially for the strain sensitivity of the TianQin inertial sensor. Comprehensive low-frequency thermal stability of the inertial sensor are essential inputs to the thermal design and the thermal diagnostics. However, the relative contributions of the different heat transfer effects within the vacuum chamber, as well as the effect of rarefied gas, remain undefined. In this work, the various heat transfer processes are decoupled and analyzed, particularly the rarefied gas heat transfer based on the frequency domain thermal framework. The results indicate that the thermal radiation accounts for only 4.55 % of the total heat transfer within the inertial sensor, and the rarefied gas heat transfer contributes even less. In order to meet the error budget, the temperature fluctuations along the x-axis direction of the vacuum chamber in the inertial sensor should be limited to 1 mK/Hz^1/2. Moreover, the thermocouples on the vacuum chamber should be arranged in pairs.

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天琴惯性传感器的低频热稳定性

温度波动是影响天基引力波探测器，尤其是天琴惯性传感器应变灵敏度的主要因素。综合低频热稳定性是惯性传感器热设计和热诊断的重要输入。然而，真空室内不同传热效应的相对贡献，以及稀薄气体的影响，仍未确定。本文对各种传热过程进行了解耦和分析，特别是基于频域热框架的稀薄气体传热。结果表明，热辐射仅占惯性传感器内部总传热的4.55%，稀薄气体传热的贡献更小。为了满足误差预算，惯性传感器真空室沿x轴方向的温度波动应限制在1 mK/Hz1/2。此外，真空室上的热电偶应成对布置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.