A multi-step electrostatic probe probe

An electrostatic probe and multi-step technology, which is applied in the field of electrostatic probes, can solve the problems of multi-step probes with large volume, large influence of plasma, and no simultaneous measurement, etc., to reduce mutual shielding and signal interference, reduce the number of needles, The effect of reducing the impact

Active Publication Date: 2022-07-29
SOUTHWESTERN INST OF PHYSICS
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  • Abstract
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  • Claims
  • Application Information

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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

Method used

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  • A multi-step electrostatic probe probe

Examples

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Effect test

Embodiment 1

[0043] like figure 1 As shown, a multi-step electrostatic probe probe includes a graphite sheath 10, a first dual probe 1, a second dual probe 2, a first floating potential probe 3, a second floating potential probe 4, three floating potential probes 7, a fourth floating potential probe 8, a fifth floating potential probe 9, a first Mach probe 5 and a second Mach probe 6;

[0044] The top of the graphite sheath 9 is in a stepped structure, and the stepped structure includes a radial first stepped surface, a radial second stepped surface and a radial third stepped surface, and the radial second stepped surface and the radial first stepped surface. The heights of the three stepped surfaces are all lower than the radial first stepped surface, and the radial positions of the radial second stepped surface and the radial third stepped surface are different;

[0045] The tops of the first dual probe 1 and the second dual probe 2 are annularly distributed on the radial first step sur...

Embodiment 2

[0052] like figure 1 As shown, this embodiment is based on Embodiment 1, a multi-step electrostatic probe probe, the first dual probe 1, the second dual probe 2, the first floating potential probe 3, the second dual probe The top needles of the floating potential probe 4, the third floating potential probe 7, the fourth floating potential probe 8, the fifth floating potential probe 9, the first Mach probe 5 and the second Mach probe 6 have the same structure; The first dual probe 1, the second dual probe 2, the first floating potential probe 3, the second floating potential probe 4, the third floating potential probe 7, the fourth floating potential probe 8, the fifth floating potential probe The diameters of the top needles of the floating potential probe 9 , the first Mach probe 5 and the second Mach probe 6 are all 2 mm to 4 mm.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R1/067H05H1/00
CPCH05H1/0006G01R1/06711
Inventor 吴婷许敏聂林柯锐
Owner SOUTHWESTERN INST OF PHYSICS
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