High-frequency magnetic probe diagnosis system for measuring radio frequency wave characteristics

Abstract

The invention discloses a high-frequency magnetic probe diagnosis system for measuring radio frequency wave characteristics. The measuring system comprises a vacuum coaxial electrode, a high-frequencymagnetic probe, a power divider, a detector, a phase discriminator and a signal acquisition system, the vacuum coaxial electrode is used for transmitting radio frequency signals from the Tokamak to the outside of the Tokamak; the high-frequency magnetic probe is used for coupling the radio-frequency signals; the power divider is used for distributing the voltage probe and current probe signals into two paths with equal amplitude and equal phase; the detector is used for detecting the peak-to-peak value of the voltage probe and current probe radio frequency signals, and the result is output bya direct-current signal; the phase discriminator detects the phase difference between the voltage probe and current probe signals, and the result is output by a direct-current signal. The signal acquisition system stores the collected voltage signals to a computer.

Description

technical field [0001] The invention relates to the technical field of measuring the characteristics of the ion cyclotron wave itself near the ion cyclotron antenna, in particular to a high-frequency magnetic probe diagnostic system for measuring the characteristics of radio frequency waves. Background technique [0002] The ion cyclotron wave auxiliary heating system is the main auxiliary heating system in most tokamaks. The frequency range of the ion cyclotron wave in the tokama is roughly 20-80MHz. In EAST, the operating frequency range is currently 25-70MHz. High-frequency electromagnetic waves are coupled into the plasma through the antenna to heat the plasma. ICRF is mainly electromagnetic wave fast wave heating, but the emergence of slow wave is inevitable, so the measurement boundary and the slow wave ratio are particularly important, which can play a very important role in optimizing the antenna and improving the coupling of radio frequency waves. We know that th...

AI Technical Summary

Problems solved by technology

At present, we have been able to monitor the plasma density, temperature, potential and other parameters well at the plasma boundary, but we lack the necessary understanding of the characteristics of the ion gyration itself. In this context, we have built a set of magnetic probe diagnostic systems. It is mainly used to measure the characteristics of the ion cyclotron wave itself

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