Perturbative Effect Of Spacetime Produced By High Frequency Gravitational Waves In Focal Region Of Electromagnetic Toroidal Cavity And Tokamak

The gravitational wave is the important prophesy of Einstein's general theory of relativity. During 1950-1960 in last century, the existence of the gravitational wave had already been recognized in physical area for the solution of a series of important problems. Although the observation of PSR1913+16 gravitational radiation damping can provide some indirect evidence to the existence of gravitational wave, however, there is no substantial breakthrough about the direct exploration. The common sense in scientific circles is: once human can discover gravitational wave directly, which will open an overall new gravitational wave information age for nature as well as for human civilization. It will also brings great scientific value. Recently, some famous international scientists and experimental physicists begin to break the traditional study method in order to make the substantial breakthrough in the study of high frequency gravitational wave.This paper firstly presents an overview to the development of gravitational theory. It also introduces the formation and achievement of Newtonian theory of gravity, present difficulty, establishment and experimental verification of Einstein's the general theory of relativity. In chapter two, it explains gravitational radiation, especially the linear solution in gravitational field. That means it gives explanation to weak field. Celestial gravitational wave source and the exploration to low frequency gravitational wave have also been discussed. In chapter three, It mainly describes the potential high frequency gravitational wave source and some major exploration methods. In chapter four, the curvature tensor in electromagnetic cavity centre area and the energy density of gravitational standing wave have been carefully calculated. Their relations (curvature tensor and energy density ) have also been discussed.This paper shows the gravitational radiation of controlled nuclear fusion Tokomak device on earth. Through estimation, the produce of gravitational radiation is too small by this kind of system. We still don't have proper effect for observation at present experimental situation.Secondly, in the paper, the gravitational field h and the physical quantity of time and space geometrical structure ( such as: the second kind of Krusei liaison, Riemannian curvature tensor, Riccitensor and curvature scalar )in electromagnetic cavity centre area are all carefully calculated. Besides that, we presents the gravitational wave energy density under the weak field situation and gives the x - y plane numerical calculation to curvature scalar R and energy density .The results are: (1) It is curved in the centre. The energy density has qualitative quality. (2) The curvature tensor and energy density decrease quickly with the bigger radical coordinate r. That means the curvature tensor in centre area and energy density in gravitational stand field can reach the largest value. (3) Though the amplitude dynamic change of can not be observed according to present technical parameter, it still has great significance to use high energy annular device ( such as high energy annular microwave cavity, controlled nuclear fusion Tokomak device ) as the potential high frequency gravitational wave source.