Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum | |
Wang, Shaoxin3,4; Liu, Heshan3,4; Dai, Lei2; Luo, Ziren1,3,4; Xu, Peng1,3,4; Li, Pan3,4; Gao, Ruihong3,4; Li, Dayu2; Qi, Keqi3,4 | |
刊名 | SENSORS |
2023-10-01 | |
卷号 | 23期号:19页码:16 |
关键词 | torsion pendulum sensitivity optical readout DWS |
DOI | 10.3390/s23198087 |
通讯作者 | Qi, Keqi(qikeqi@imech.ac.cn) |
英文摘要 | In space gravitational wave detection missions, a drag-free system is used to keep the test mass (TM) free-falling in an ultralow-noise environment. Ground verification experiments should be carried out to clarify the shielding and compensating capabilities of the system for multiple stray force noises. A hybrid apparatus was designed and analyzed based on the traditional torsion pendulum, and a technique for enhancing the sensitivity of the torsion pendulum system by employing the differential wavefront sensing (DWS) optical readout was proposed. The readout resolution experiment was then carried out on an optical bench that was designed and established. The results indicate that the angular resolution of the DWS signal in optical readout mode can reach the level of 10 nrad/Hz1/2 over the full measurement band. Compared with the autocollimator, the sensitivity of the torsional pendulum is noticeably improved, and the background noise is expected to reach 4.5 x 10-15 Nm/Hz1/2@10 mHz. This method could also be applied to future upgrades of similar systems. |
资助项目 | The authors would like to thank the Taiji Scientific Collaboration for many useful discussions on the Taiji-1 implementation process. The authors also thank the National Microgravity Laboratory (NML) of Imech for supporting the experimental conditions of t ; National Microgravity Laboratory (NML) of Imech |
WOS关键词 | GRAVITATIONAL-WAVE DETECTION ; TAIJI PROGRAM ; SPACE ; LISA ; INTERFEROMETER ; ANTENNA |
WOS研究方向 | Chemistry ; Engineering ; Instruments & Instrumentation |
语种 | 英语 |
WOS记录号 | WOS:001081640900001 |
资助机构 | The authors would like to thank the Taiji Scientific Collaboration for many useful discussions on the Taiji-1 implementation process. The authors also thank the National Microgravity Laboratory (NML) of Imech for supporting the experimental conditions of t ; National Microgravity Laboratory (NML) of Imech |
内容类型 | 期刊论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/93153] |
专题 | 力学研究所_国家微重力实验室 |
通讯作者 | Qi, Keqi |
作者单位 | 1.Univ Chinese Acad Sci UCAS, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China 2.Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China 3.Univ Chinese Acad Sci UCAS, Taiji Lab Gravitat Wave Universe Beijing Hangzhou, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mech, Ctr Gravitat Wave Expt, Natl Micrograv Lab, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Shaoxin,Liu, Heshan,Dai, Lei,et al. Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum[J]. SENSORS,2023,23(19):16. |
APA | Wang, Shaoxin.,Liu, Heshan.,Dai, Lei.,Luo, Ziren.,Xu, Peng.,...&Qi, Keqi.(2023).Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum.SENSORS,23(19),16. |
MLA | Wang, Shaoxin,et al."Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum".SENSORS 23.19(2023):16. |
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