Magnetic probe array for measuring low-clutter parallel wave number and wave polarization in plasma
A technology of plasma and magnetic probes, applied in the field of magnetic probe arrays, can solve problems such as difficult identification of wave phase by directional couplers
Active Publication Date: 2019-08-09
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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[0004] The purpose of the present invention is to provide a magnetic probe array for measuring the parallel wave number and wave polarization of low clutter waves in plasma, so as to solve the problem that the prior art directional coupler is difficult to identify the wave phase propagating in a specific direction
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] Such as figure 1 , figure 2 , image 3 As shown, the magnetic probe array for measuring the parallel wavenumber and wave polarization of low clutter in plasma includes magnetic probe array a and magnetic probe array b, and the magnetic probe array a and magnetic probe array b are respectively composed of multiple The magnetic probes are arranged in an array, and the magnetic probes in the magnetic probe array a and the magnetic probe array b have the same structure, and each magnetic probe includes a stainless steel shielding barrel 5, a silicon dioxide semi-rigid coaxial line, stainless steel Shielding barrel 5 has a bottom cover 6 connected to the barrel mouth at one end of the axial end. The center of the bottom cover 6 has a rectangular gap 9. The silicon dioxide semi-rigid coaxial line is composed of inner and outer conductors 2, 1 and si...
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The invention discloses a magnetic probe array for measuring the low-clutter parallel wave number and wave polarization in plasma. The magnetic probe array comprises a magnetic probe array a perpendicular to a background magnetic field and a fixed-distance magnetic probe array b parallel with a magnetic field; and the magnetic probe array a and the magnetic probe array b are used for measuring thepropagating low clutter phase and polarization characteristics in plasma. Each magnetic probe includes a silicon dioxide semi-rigid coaxial wire, a stainless steel sleeve, a stainless steel shieldingbarrel and a ceramic sheet. A magnetic probe coil is formed by winding of an inner conductor of a silicon dioxide semi-rigid coaxial wire and is welded to an outer conductor; and the outer surface ofthe coil is covered by the stainless steel shielding barrel. A rectangular slit is opened in the bottom cover of the stainless steel shielding barrel; and the ceramic sheet is arranged between the bottom cover and the coil. According to the invention, on the basis of the shielding structure with the rectangular slit, the magnetic probes have microwave coupling abilities with specific direction propagation characteristics; and the microwave phase propagated in free space can be measured and especially the low clutter phase and polarization characteristic propagated in plasma can be measured.
Description
technical field [0001] The invention relates to the field of microwave measuring devices in a tokamak, in particular to a magnetic probe array for measuring the parallel wavenumber and wave polarization of low clutter waves in plasma. Background technique [0002] Low clutter current drive (LHCD) is an important means of non-inductive current drive and heating on tokamak devices. Most of the magnetic confinement fusion devices in the world have low clutter systems, such as Tore-Supra in France, AlcatorC-Mod in the United States, and EAST Tokamak in my country. In low clutter physics experiments, the parallel wavenumber k of low clutter / / It is a key physical quantity that determines the propagation, absorption and current driving efficiency of low clutter in plasma. The initial k before entering the plasma / / It is determined by the phase difference between the adjacent waveguides of the low clutter antenna, which can be calculated by electromagnetic wave-plasma coupling...
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Login to View More IPC IPC(8): G01R29/08
CPCG01R29/08
Inventor 李妙辉王云飞丁伯江王茂刘亮赵连敏吴则革
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI