Multi-step type electrostatic probe head

Abstract

The invention discloses a multi-step type electrostatic probe head which comprises a graphite sheath, a first double probe, a second double probe, a first suspension potential probe, a second suspension potential probe, a third suspension potential probe, a fourth suspension potential probe, a fifth suspension potential probe, a first Mach probe and a second Mach probe. According to the invention, the nine probes are respectively arranged on the first radial step surface, the second radial step surface and the third radial step surface. According to the invention, not only can physical quantities which can be measured by common three-probe and four-probe and three items in a radial electric field be measured, but also a radial multi-scale structure and a polar multi-scale structure of turbulent flow can be measured, and the multi-step type electrostatic probe head has the advantages of small number of probes and small size.

Description

Technical field [0001] The present invention relates to the field of electrostatic probe, and more particularly to a multi-step electrostatic probe probe. Background technique [0002] Edge plasma turbulence is the key to constraints of the Torkmark constraint. Toma Mark plasma rich in multi-scale turbulent disturbances and complex multi-scale nonlinear interactions, study the mechanism of multi-spatial scale multimode multi-mode nonlinear interactions in high constrained plasma, understanding multi-scale turbulent nonlinear self-organizing process important. The turbulence is different in radial and extremely structural structures, and the frequency range is approximately 0-1MHz, and the range of wave numbers is approximately 0-100cm. -1 . In general, each turbulence diagnosis has a specific measurement range, while multi-scale turbulence diagnosis is difficult. [0003] The turbulence of the edge zone and its transportation and the radial electric field and its shear mutual eff...

AI Technical Summary

Problems solved by technology

However, there are some problems with the multi-step probe. The first is that the multi-step probe has a large volume and has a relatively large impact on the plasma; the second is that the multi-step probe has a large number of needles, generally more than 12 needles, each There are also many occlusions between the needles, and more needles may interfere with each other during data transmission; the third is that there is currently no probe that can simultaneously measure all the required physical parameters for this research goal, so a special needle needs to be designed The combined multi-step probe, in addition to the physical quantities that can be measured by the common three-probe and four-probe, can also simultaneously measure the three items in the radial electric field (ie, the pressure gradient item, the poloidal flow item and the annular flow item). each, as well as measuring the poloidal and radial multiscale structure of the turbulence

Images