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Proposal for a quantum mechanical test of gravity at millimeter scale.
Sci Rep
December 2024
Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China.
The experimental verification of the Newton law of gravity at small scales has been a longstanding challenge. Recently, torsion balance experiments have successfully measured gravitational force at the millimeter scale. However, testing gravity force on quantum mechanical wave function at small scales remains difficult.
View Article and Find Full Text PDFCore Payload of the Space Gravitational Wave Observatory: Inertial Sensor and Its Critical Technologies.
Sensors (Basel)
November 2024
Center for Gravitational Wave Experiment, National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
Since Einstein's prediction regarding the existence of gravitational waves was directly verified by the ground-based detector Advanced LIGO, research on gravitational wave detection has garnered increasing attention. To overcome limitations imposed by ground vibrations and interference at arm's length, a space-based gravitational wave detection initiative was proposed, which focuses on analyzing a large number of waves within the frequency range below 1 Hz. Due to the weak signal intensity, the TMs must move along their geodesic orbit with a residual acceleration less than 10 m/s/Hz.
View Article and Find Full Text PDFAgile control of test mass based on PINN-DDPG for drag-free satellite.
ISA Trans
November 2024
School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address:
Agile control after the release of test mass is related to the success or failure of China's space gravitational wave detection program, such as TianQin and Taiji. In the release process, the test mass's motion state is complex and susceptible to collisions with the satellite cavity. In addition, the release capture control of the test mass uses electrostatic force, which is extremely small.
View Article and Find Full Text PDFAirborne fungal concentrations around the Modelo Callao Landfill.
Heliyon
October 2024
Department of Engineering, Faculty of Environmental Engineering, San Ignacio Loyola University, Fontana Avenue 750, La Molina (SL02), Lima, Peru.
Non-hazardous waste generated in Metropolitan Lima and Callao is transported to the Modelo Callao landfill for safe disposal. The accumulation of waste constitutes a significant source of fungal particles released into the atmosphere, posing a potential health risk to nearby populations. The aim of this research was to evaluate the concentration of outdoor fungal particles, considering environmental conditions (temperature, relative humidity, wind speed, and direction) during summer and winter seasons in the 18 de octubre settlement and Chillón Avenue, areas located in the vicinity of the Modelo Callao Landfill in Ventanilla during 2022.
View Article and Find Full Text PDFDesign method for the structure of a gravitational wave detection telescope with low TTL noise.
Sci Rep
November 2024
MOE Key Laboratory of TianQin Mission, TianQin Research Center for Gravitational Physics and School of Physics and Astronomy, Frontiers Science Center for TianQin, Gravitational Wave Research Center of CNSA, Sun Yat-sen University (Zhuhai Campus), Zhuhai, 519082, China.
As a critical payload of the gravitational wave detection interferometry system, the tilt-to-length (TTL) noise has a significant influence on the detection accuracy of the interferometry system. The non-geometric TTL (NG-TTL) noise, which is the main component of the TTL noise within the telescope, is closely related to the sensitive aberrations of the system's small pupil. Due to the different environments of the earth and space, structural deformations of the telescope can cause significantly unfavorable changes in the sensitive aberrations at the small pupil.
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