The Development of Phasemeter for Taiji Space Gravitational Wave Detection

被引：44

作者：

Liu, Heshan ^{[1
]}

Luo, Ziren ^{[1
]}

Jin, Gang ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China

来源：

MICROGRAVITY SCIENCE AND TECHNOLOGY | 2018年 / 30卷 / 06期

关键词：

Taiji gravitational wave detection; Laser interferometer; Phasemeter;

D O I：

10.1007/s12217-018-9625-6

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Taiji space gravitational wave detection utilizes the laser interferometer to convert the tiny distance change into the phase fluctuation of the beat note. As to realize the sensitivity of 1 pm/ Hz, the phasemeter needs to calculate the phase with the precision of 2 rad/ Hz in the frequency range of 0.1 mHz and 1 Hz. In this paper, we report recent progress of the phasemeter for Taiji. Noises which possibly affect the measurement sensitivity are tested and discussed, especially the sampling noise and the frequency jitter. Finally, the accuracy of the phasemeter is calibrated. The result shows that the sensitivity has reached the requirement of Taiji in the frequencies between 0.01 Hz and 1 Hz, 0.1 mHz-1 mHz. Noises in the range of 1 mHz and 0.01 Hz, which have not yet depressed well, are dominated by the clocking jitter and the thermal fluctuation.

引用

页码：775 / 781

页数：7

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