| Noises in Detecting Relic Gravitational Wave |
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| 作者姓名： | 李志军 万珍珠 |
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| 作者单位： | [1]Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 [2]Department of Physics, China University of Geosciences, Wuhan 430074 |
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| 摘 要： | We analyse the three basic kinds of noises in detecting the relic gravitational wave （GW）, which are the noises caused by the thermal radiation in the detecting cavity and by the scattering of the Gaussian beam in the detecting cavity, and noise in the microwave radiometers. The analysis shows that a reasonable signal-to-noise ratio may be achieved for a detecting device with a suitable geometric structure only when the temperature of the environment is no more than T = 0.6 K, and the power of the radiation of the Gaussian beam is no less than P=10^5 W.
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| 关 键 词： | 残余引力波 检测方法 噪声 信噪比 高斯束 辐射强度 环境温度 |
| 收稿时间： | 2006-07-13 |
| 修稿时间： | 2006-07-13 |
Noises in Detecting Relic Gravitational Wave |
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| LEE Zhi-Jun,WAN Zhen-Zhu.Noises in Detecting Relic Gravitational Wave[J].Chinese Physics Letters,2006,23(12):3183-8186. |
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| Authors: | LEE Zhi-Jun WAN Zhen-Zhu |
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| Institution: | 1.Department of Physics, Huazhong University of Science and Technology, Wuhan 430074; 2.Department of Physics, China University of Geosciences, Wuhan 430074 |
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| Abstract: | We analyse the three basic kinds of noises in detecting the relic gravitational wave (GW), which are the noises caused by the thermal radiation in the detecting cavity and by the scattering of the Gaussian beam in the detecting cavity, and noise in the microwave radiometers. The analysis shows that a reasonable signal-to-noise ratio may be achieved for a detecting device with a suitable geometric structure only when the temperature of the environment is no more than T=0.6 K, and the power of the radiation of the Gaussian beam is no less than P=105 W. |
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| Keywords: | 05 40 Ca 05 30 Jp 04 80 Nn 95 55 Ym 04 30 Nk |
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