Prospects for High-Frequency Gravitational-Wave Detection with GEO600

Other Versions:

Abstract:: Current ground-based interferometers are optimized for sensitivity around 200 Hz. While they are not currently utilized for GW detection, interferometric detectors also feature narrow bands of strong sensitivity where the sideband fields created by a GW are resonant in the optical system. With just small changes to system parameters, the narrow band of high sensitivity can be scanned over a much larger range of frequencies, potentially broadband detection at high frequencies. In this paper, we investigate whether simply modifying the detuning angle of the signal-recycling mirror of the GEO600 interferometer can make this experiment sensitive to GWs in the kilohertz frequency range. Using Finesse 3.0, we compute a noise budget for GEO600 across a frequency range from several kHz to tens of kHz for various detuning angles. Using these noise budgets, we calculate the sensitivity of GEO600 to various proposed high-frequency GW sources, and compare its ability to detect such sources to that of other ground-based interferometers.

Files in Document:

Other Files:

LIGO Document G2401663-v6