Survey of Selected Procedures for the Indirect Determination of the Group Refractive Index of Air

Dvořáček, Filip

doi:10.14311/ap.2018.58.0009

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…And the temperature, humidity, and pressure will cause a change in the air refractive index [23]. In order to minimize the influence of the change in the air refractive index on the displacement measurement, the environmental compensation unit (ECU) is introduced to compensate for the change in environmental factors, and the ECU calculates the air refractive index by collecting the information on the surrounding environment using the indirect measurement method [24,25].…”

Section: The Displacement Interferometric Monitoring Systemmentioning

confidence: 99%

Non-Magnetic Negative Coefficient of Thermal Expansion Support Structure between Payloads in the Taiji Space Gravitational Wave Detection Satellite

Diao,

Tao,

Deng

et al. 2023

Machines

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The support structure between payloads is an important part of a space gravitational wave detection satellite, and its thermal stability will directly affect the interferometer’s measurement accuracy. However, due to temperature changes, the connecting structure between the loads will generate deformation, and a support structure with the coefficient of thermal expansion (CTE) of −1 × 10−6/K will thus need to be designed to counteract this thermal deformation. In order to solve this problem, this paper adopts the method of mutual offsetting of the thermal deformation of different materials to design a thermally stable support structure satisfying this negative CTE. The structure was optimized by the arithmetic of non-linear programming by the quadratic Lagrangian hybrid algorithm (NLPQL), and the structural parameter satisfying the CTE of −1.008 × 10−6/K was obtained. Meanwhile, the effect of the change in the thermal expansion coefficient of each material on the overall structure under this parameter was sampled and calculated. Moreover, the experimental results show that the CTE of the support structure under the optimized parameters was −1.114 × 10−6/K, which differs from the simulation results by 9.5%.

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Section: The Displacement Interferometric Monitoring Systemmentioning

confidence: 99%

Non-Magnetic Negative Coefficient of Thermal Expansion Support Structure between Payloads in the Taiji Space Gravitational Wave Detection Satellite

Diao,

Tao,

Deng

et al. 2023

Machines

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Influence analysis of Waverider wake on the deflection rate of light

Guo

Chen

2022

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Dimensional Stability Ground Test and in-Orbit Prediction of SiC Telescope Frame for Space Gravitational Wave Detection

et al. 2022

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Telescope is the key element of space brone gravitational wave detector. Its dimensional stability is required to be better than 1 pm/Hz 1/2 at 0.1 mHz. And SiC is the current most likely material for manufacturing telescope with high dimensional stability. Therefore, a potential SiC telescope frame is designed and tested. In addition, in orbit dimensional stability is predicted by a numerical model. The ground dimensional stability of SiC frame is tested with a fiber-based interferometer, and the temperature change data are collected at the same time. The results of which show that when room temperature fluctuation frequency is greater than 10 mHz, the dimensional stability is about 300 pm/Hz 1/2 . A numerical model is established which is consistent with the measured data. The in-orbit dimensional stability is evaluated using the numerical model and the thermal environment of Taiji, whose numerical simulation results shows that when space temperature fluctuation frequency is about 0.1 mHz the dimensional stability would be 6.49 pm/Hz 1/2 .

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Survey of Selected Procedures for the Indirect Determination of the Group Refractive Index of Air

Cited by 3 publications

References 16 publications

Non-Magnetic Negative Coefficient of Thermal Expansion Support Structure between Payloads in the Taiji Space Gravitational Wave Detection Satellite

Non-Magnetic Negative Coefficient of Thermal Expansion Support Structure between Payloads in the Taiji Space Gravitational Wave Detection Satellite

Influence analysis of Waverider wake on the deflection rate of light

Dimensional Stability Ground Test and in-Orbit Prediction of SiC Telescope Frame for Space Gravitational Wave Detection

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