Method and system for real-time calculating phase shift signal, plasma diagnostic method and system

Abstract

A method and system for real-time calculating the dynamic phase shift signal are disclosed. The method comprises the following steps: segmenting the medium frequency signals in the testing channel and the reference channel, respectively; reading out the medium frequency signals in the testing channel and the reference channel at the present time period and converting the signals into the digital signals by an A / D conversion, respectively; converting the digital signals in the testing channel and the reference channel obtained at the present time period into the frequency domain signals by Fourier transform, respectively; and synchronously obtaining the accurate frequency at the present time period; and obtaining the phase difference by conducting a conjugate calculation on the frequency domain signals in the reference channel and the testing channel at the present time period according to the accurate frequency at the present time period. A plasma diagnostic method and system are also disclosed. The method and system for real-time calculating the dynamic phase shift signal can achieve the unattended and reliable real-time phase calculation and output, and the plasma diagnostic method and system which use the method and system for real-time calculating the phase shift signal can further reliably achieve the unattended real-time measurement for the electronic density and the current density.

Description

technical field [0001] The invention relates to the field of nuclear fusion plasma diagnosis, and in particular to a method and system for real-time calculation of phase shift signals that can be applied to real-time calculation of dynamic phase shifts of multi-IF signals in polarized light measurement technology. A method and system for calculating a phase-shifted signal A method and system for plasma diagnosis. Background technique [0002] In nuclear fusion devices and physics research, plasma electron density and current density are the most basic and critical physical parameters to study plasma behavior and physics. Relevant research institutions at home and abroad are continuously investing manpower and material resources to research and develop more reliable, real-time, high-space-time-resolution diagnostic techniques and methods to meet the research needs of emerging new physical phenomena. [0003] Usually, the plasma electron density and current density distributi...

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Problems solved by technology

[0006] The technical problem solved by the present invention is that in the prior art, due to the frequency drift of the laser, it is difficult to realize the real-time calculation of the phase difference during the nuclear fusion test, and then provide a real-time calculation dynamic that can be applied when the frequency of the laser drifts. For the method of phase shifting signal, the present invention also provides a system for calculating dynamic phase shifting signal in real time and a plasma diagnosis method and system applying the method and system for calculating phase shifting signal in real time

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