A multi-step electrostatic probe probe

Abstract

The invention discloses a multi-step electrostatic probe probe, a multi-step electrostatic probe probe comprising a graphite sheath, a first double probe, a second double probe, a first floating potential probe, a second double probe The floating potential probe, the third floating potential probe, the fourth floating potential probe, the fifth floating potential probe, the first Mach probe and the second Mach probe; To the first stepped surface, the radially second stepped surface and the radially third stepped surface. The invention can not only measure the physical quantities that can be measured by common three probes and four probes and the three items in the radial electric field, but also can measure the radial multi-scale structure and poloidal multi-scale structure of turbulent flow, and has a small number of needles. , the advantages of small size.

Description

technical field [0001] The invention relates to the technical field of electrostatic probes, in particular to a multi-step electrostatic probe probe. Background technique [0002] The edge plasma turbulence is the key to restrict the confinement performance of tokamak. Tokamak plasma is rich in multi-scale turbulent perturbations and complex multi-scale nonlinear interactions. It is very important to study the mechanism of multi-space-time-scale and multi-mode nonlinear interactions in highly constrained plasmas and understand multi-scale turbulent nonlinear self-organization processes. important. Turbulence has different structures in the radial and poloidal directions, the frequency range is about 0-1MHz, and the wavenumber range is about 0-100cm -1 . Generally speaking, each turbulence diagnosis has a specific measurement range, and it is difficult to perform multi-scale turbulence diagnosis at the same time. [0003] Turbulence in the edge region and its transport in...

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