Length sensing and control for Einstein Telescope Low Frequency

11th Edoardo Amaldi Conference on Gravitational Waves

Adya, Vaishali^1,2 ; Leavey, Sean^1 ; Lück, Harald^1,2 ; Graf, Christian^3 ; Hild, Stefan^3

Max-Planck-Insitut für Gravitationsphysik, Albert-Einstein-Institut, Hannover, Germany^1

Institut für Gravitationsphysik, Leibniz Universitat, Hannover, Germany^2

SUPA, School of Physics and Astronomy, University of Glasgow, G12 8QQ, United Kingdom^3

关键词: Control schemes;    Low-frequency;    Modulation frequencies;    Optical parameter;    Simulation packages;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/716/1/012030/pdf
DOI  :  10.1088/1742-6596/716/1/012030

来源: IOP

【 摘 要 】

In this paper we describe a feasible length sensing and control scheme for the low frequency interferometers of the Einstein Telescope (ET-LF) along with the techniques used to optimise several optical parameters, including the length of the recycling cavities and the modulation frequencies, using two numerical interferometer simulation packages: Optickle and Finesse. The investigations have suggested the use of certain combinations of sidebands to obtain independent information about the different degrees of freedom.