On the direct detection of gravitational waves, and some of the problems of improving laser interferometers

International Conference on Gravitation Cosmology and Continuum Mechanics (dedicated to the centenary of Kirill Petrovich Staniukovich)

物理学;力学

Pustovoyt, V.I.^1

Center Photonics, Bauman Moscow State Technical University, Moscow, Russia^1

关键词: Dielectric permeability;    Incident laser radiation;    Laser interferometer;    Laser interferometric;    Mechanical connections;    Relativistic correction;    Sinusoidal variations;    Technological methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/731/1/012011/pdf
DOI  :  10.1088/1742-6596/731/1/012011

学科分类：力学，机械学

来源: IOP

【 摘 要 】

In this paper we describe an observational method for determining black holes masses. The study shows that the knowledge of the recorded low-frequency gravitational waves and the period from the beginning of registration till the moment of black holes collapse is sufficient and even preferable in determining the possible values of collapsing black holes masses. The reason for this is that the proportion of the period in the measured interval containing relativistic corrections (i.e. those ones in which the black hole speed is comparable to the speed of light), is smaller if the observed and measured time interval is longer. The values of black holes masses and the measured time interval, obtained as a result of the first observations, according to this model are in a very good agreement.We examine the problem of mirror heating in Fabry-Perot cavity of Michelson interferometer, by incident laser radiation, and we conclude that the problem of heat removal can be solved by a different approach, without use of multilayer reflective openings. As an alternative approach to the creation of highly reflective structures, we suggest using a spatially extended structure with a sinusoidal variation of the refractive index. We consider some of the possible technological methods for producing such structures based on heterogeneous media.The article describes the effects of the incident laser radiation exposure on the periodic structure, and it shows that the volume ponderomotive force may lead to a mirror polarization due to the radiation, and consequently, to appearance of an additional mechanical connection of the mirror with the surrounding mirror suspension design. The article examines the impact of the surface ponderomotive forces on the media boundary with different dielectric permeability and it shows that pressure spatial variables arising at the same time lead to deformation of the media layers, and the deformation and pressure values depend on the difference in the dielectric permeability values of the nearest layers. We also state the possible consequences of such spatially variable pressures effects (violation of synchronism conditions (misalignment) of reflective coatings, and others. It is also noted that our work, in which a laser interferometric technique for the detection of gravitational waves was first proposed, was already known to Joseph Weber in 1963.