Abstract This paper discusses the basic categories of noise in detecting high frequency gravitational waves in the microwave band (～0.1--10 GHz), which contain shot noise from the laser and the thermal radiation photons, thermal noise from statistical fluctuation of the thermal photons and fluctuation of the temperature, radiation press noise on the fractal membrane, the noise caused by the scattering of the Gaussian Beam (GB) in the detecting tube and noise in the microwave radiometers. The analysis shows that a reasonable signal-to-noise ratio may be achieved for a detecting device with the fixed power of GB (105 W), only when the temperature of the environment is no more than T=1 K, and the optimal length of the microwave radiometers is about 0.3 m.
Received: 01 July 2008
Revised: 03 August 2008
Accepted manuscript online:
(Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques)
Fund: Project supported by the National
Basic Research Program of China (Grant No 2003CB716300), the
National Natural Science Foundation of China (Grant No 10575140),
and CAEP Foundation (Grant Nos 2008 T0401 and 2008 T0402).
Cite this article:
Li Jin(李瑾), Li Fang-Yu(李芳昱), and Zhong Yuan-Hong(仲元红) Noise in a coupling electromagnetic detecting system for high frequency gravitational waves 2009 Chin. Phys. B 18 922
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