High-Frequency Gravitational Wave (HFGW) Generation by Means of X-ray Lasers and Detection by Coupling Linearized GW to EM Fields

Abstract

An experiment is described for the generation and detection of High-Frequency Gravitational Waves (HFGWs) in the laboratory utilizing a pair of tabletop X-ray lasers for generation and a coupling system of semitransparent, beam-splitting membranes with a pulsed Gaussian beam passing through a static magnetic field for detection. The laser axes are coplanar, their pulses are synchronized, and they are aligned in exactly opposite directions. They produce equal and opposite impulsive forces at the laser targets. Essentially, the X-ray lasers emulate a double-star orbit. Photons striking a target will produce a jerk (time rate of change of acceleration) and together with a computer controlled logic system will generate a HFGW spike each time the laser pulses are repeated. Specifications are tabulated for several different X-ray lasers. The focus or concentration point of the gravitational radiation generated by the X-ray laser pairs is located at the midpoint between the laser targets. The HFGW detecting system, proposed by Chongqing University, is situated at the HFGW focus. A High-Temperature Superconductor (HTSC) could might possibly concentrate the peak HFGW flux, potentially up to 4.93x10 24 Wm-2 (over a very small detection area). Such large HFGW fluxes may be suitable for future aerospace applications.

Gravitational Wave (GW) Radiation Pattern at the Focus of a High-Frequency GW (HFGW) Generator and Aerospace Applications

“…The three-dimensional shape of the GW radiation pattern is like a dumbbell (or its cross-section or slice; for two opposed masses), having their long axis perpendicular to the plane of motion or along the central axis of the stationary ring array of jerking, energizable elements (Baker and Li, 2005;Woods and Baker, 2005). The three-dimensional shape of the GW radiation pattern is like a dumbbell (or its cross-section or slice; for two opposed masses), having their long axis perpendicular to the plane of motion or along the central axis of the stationary ring array of jerking, energizable elements (Baker and Li, 2005;Woods and Baker, 2005).…”

“…For the X-ray laser generated HFGW (Baker and Li, 2005) λ GW ~ 0.029µm and the hypothetical HTSC slab thickness around the focal spot would be an integer multiple of (0.029 µm/300)/2 = 5x10 -11 m. For example, 100,000 integer thicknesses or one µm. But there are other issues to be raised here, such as whether the HTSC wall or slab can be made at this thickness and with the required uniformity and tolerance.…”

“…For point sources, such as relatively nearby evaporating primordial mini-black holes (Miller, 2002;Bisnovatyi-Kogan and Rudenko, 2004), the concentration would be much greater. For point sources, such as relatively nearby evaporating primordial mini-black holes (Miller, 2002;Bisnovatyi-Kogan and Rudenko, 2004), the concentration would be much greater.…”

Ultra-High-Intensity Lasers for Gravitational Wave Generation and Detection

“…The present paper is prompted by the increasing likelihood of laboratory-scale generation and detection of HFGW in the near future due to the advent of new laser technology. In Baker and Li (2005) the use of Xray lasers was suggested for the generation of HFGWs. Here we utilize ultra-high-intensity lasers for that purpose.…”

The Peoples Republic of China High-Frequency Gravitational Wave Research Program

“…There have been some twelve peer-reviewed journal publications concerning the theory since 1992. Some of them are: Li, Tang and Zhao (1992), Li and Tang (1997), Li, Tang, Luo and Li (2000), Li and Yang (2004), Baker and Li (2005), Li, Baker and Chen (2006), Baker, Woods and Li (2006), , and Li, Baker, Fang, Stephenson and Chen (2008). …”