¹Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
²Department of Physics, China University of Geosciences, Wuhan 430074
Noises in Detecting Relic Gravitational Wave
LEE Zhi-Jun1,WAN Zhen-Zhu1,2
¹Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
²Department of Physics, China University of Geosciences, Wuhan 430074
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.
2006, Vol. 23 
