Resonant laser power build-up in ALPS -- a "light-shining-through-walls" experiment

Details Resonant laser power build-up in ALPS -- a "light-shining-through-walls" experiment Resonant laser power build-up in ALPS -- a "light-shining-through-walls" experiment

2009-05-26

arxiv.org/abs/0905.4159v1

Nucl.Instrum.Meth.A612:83-96,2009

Physics

Instrumentation and Detectors

16 pages, 15 figures

Scientific paper

10.1016/j.nima.2009.10.102

The ALPS collaboration runs a light-shining-through-walls (LSW) experiment to search for photon oscillations into "weakly interacting sub-eV particles" (WISPs) inside of a superconducting HERA dipole magnet at the site of DESY. In this paper we report on the first successful integration of a large-scale optical cavity to boost the available power for WISP production in this type of experiments. The key elements are a frequency tunable narrow line-width continuous wave laser acting as the primary light source and an electronic feed-back control loop to stabilize the power build-up. We describe and characterize our apparatus and demonstrate the data analysis procedures on the basis of a brief exemplary run.

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