Abstract
For the Taiji space gravitational wave detection and its pathfinder mission, ultraprecise technology for optical assembly must be adopted to satisfy the high measurement sensitivities required. In this paper, we construct and evaluate an optical bench to assess its precision in optical assembly and bonding. We opted for hydroxide-catalysis bonding technology and designed a corresponding adjustment scheme to achieve an ultraprecise assembly for the optical bench. After alignment, the angular deviation between the interference beam and its ideal position in the global coordinate system is no more than 45 μrad, and positional deviation is less than 10 μm. The final experimental results indicate that the measurement precision of the evaluated board is 6 pm/√Hz, which meets the specifications required for the Taiji pathfinder.
Highlights
Following the detection of gravitational waves by the LIGO (Laser Interferometer Gravitational-waveObservatory) [1], detecting such waves at lower frequencies is the exciting scientific challenge for the coming decade [2]
The LISA mission with its three satellites will use heterodyne interferometry to convert the tiny displacements between test masses into a phase fluctuation in the interferometric signal
About two months before LIGO announced the first detection of gravitational waves, the LISA pathfinder was launched into space for technical validation [6,7]
Summary
Following the detection of gravitational waves by the LIGO Similar to LISA, the Taiji space gravitational wave detection, the length of the interferometer arm being. Material during the bonding and satisfies the special of Differentlayer fromformed the traditional epoxy glue,process, the hydroxide-catalysis bonding forms requirements covalent bonds the. Taiji materials pathfinder, such ashydration structuraland strength, reliability, thinness of layer the adhesive between through hydrolysis. During the bonding process, and satisfies the special requirements of the Taiji pathfinder, principle strength, verification for the Taiji pathfinder mission, an optical bench was built employing suchFor as structural reliability, and extreme thinness of the adhesive layer.
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