Speaker
Dr
Li-Wei Wei
(AEI Hannover)
Description
Any Light Particle Search (ALPS) is a series of laboratory light-shining-through-a-wall experiments seeking light-weight sub-eV dark matter candidates including the well-motivated axion-like-particles (ALPs). To extend the experiment sensitivity into scientifically interesting parameter space in terms of ALP-photon coupling, in addition to using long dipole magnets from HERA, ALPS-II anticipates aggressive resonant optical gain, for which a dichroic control concept has been developed to be in line with the transition edge sensor for photon counting. The dichroic control concept is based on two laser wavelengths with a quasi-harmonic frequency relation, and one of the main challenges is to ensure a constant frequency offset between these two laser fields that are in simultaneous resonance with the dichroic optical cavity in ALPS-II throughout science data-taking. We will elaborate on such dichroic control concept, derive specific requirements for ALPS-II based on realistic modelling, and present the results from our prototyping experiment.
Primary author
Dr
Li-Wei Wei
(AEI Hannover)
Co-authors
Dr
Aaron Spector
(DESY)
Dr
Benno Willke
(Leibniz Universität Hannover)
Mr
Dennis Schmelzer
(AEI Hannover)
Ethan James Taylor
(University of Wyoming)
Hal Hollis
(University of Florida)
Jan Hendrik Pold
(AEI Hannover)
Mr
Kanioar Karan
(Max-Planck-Institut für Gravitationsphysik / Leibniz Universität Hannover)
