Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2003-08-29
Physics
High Energy Physics
High Energy Physics - Experiment
5 pages, 1 table and 3 figures. This manuscript has been presented in the 5th Edoardo Amaldi Conference on Gravitational Waves
Scientific paper
Q & A (quantum electrodynamics test and search for axion) experiment was first proposed in 1994 and a 3.5 m high-finesse Fabry-Perot prototype detector extendable to 7 m has been built and tested. We now enter into the 2nd phase of improving the ellipticity detection sensitivity. We present our scheme, compare with other ongoing experiments, analyze the displacement spectra of our suspension system, and use them for designing automatic alignment control to improve the ellipticicy detection sensitivity. To improve ellipsometry resolution, we use new polarizers of extinction ratio smaller than 10^{-8}.
Chen Sheng-Jui
Mei Hsien-Hao
Ni Wei-Tou
Wu Jeah-Sheng
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