CN112930015B - Electromagnetic composite probe for plasma electromagnetic characteristic diagnosis - Google Patents
Electromagnetic composite probe for plasma electromagnetic characteristic diagnosis Download PDFInfo
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- CN112930015B CN112930015B CN202110285100.3A CN202110285100A CN112930015B CN 112930015 B CN112930015 B CN 112930015B CN 202110285100 A CN202110285100 A CN 202110285100A CN 112930015 B CN112930015 B CN 112930015B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/0006—Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature
- H05H1/0087—Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature by magnetic means
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
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- G21B1/00—Thermonuclear fusion reactors
- G21B1/05—Thermonuclear fusion reactors with magnetic or electric plasma confinement
- G21B1/057—Tokamaks
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21B—FUSION REACTORS
- G21B1/00—Thermonuclear fusion reactors
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- G21B1/23—Optical systems, e.g. for irradiating targets, for heating plasma or for plasma diagnostics
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Abstract
The invention provides an electromagnetic composite probe for plasma electromagnetic characteristic diagnosis, which comprises a double-probe pair, a suspension potential probe, a Mach probe pair and a magnetic probe; the magnetic probe is used for measuring a three-dimensional magnetic field in the radial direction, the polar direction and the annular direction of the plasma; the Mach probes are arranged on two sides of the magnetic probe in a halving manner and are arranged along the circumferential direction of the magnetic field; the suspension potential probe is arranged on one side of the magnetic probe and arranged along the polar direction and the radial direction of an electric field; the double-probe pair is arranged on one side of the magnetic probe; one side of each magnetic probe is in a step shape, one Mach probe and two suspended potential probes of each Mach probe pair are located on the upper end face of the step close to the magnetic probes, and the double probe pairs and the third suspended potential probe are located on the lower end face of the step far away from the magnetic probes. By adopting the scheme, the device can be used for simultaneously measuring the ion saturated flow, the electron temperature, the density, the plasma potential, the radial electric field, the polar electric field, the annular Mach number, the radial magnetic field, the polar magnetic field and the annular magnetic field at the same local position of the plasma.
Description
Technical Field
The invention relates to the technical field of boundary plasma electromagnetic diagnosis of a Tokamak magnetic confinement nuclear fusion experimental device, in particular to an electromagnetic composite probe for plasma electromagnetic characteristic diagnosis.
Background
For a magnetic confinement fusion device, the most key problem is how to reduce particle transport and thermal transport and improve the confinement performance of plasma, thereby realizing the confinement of high temperature (-10 keV) and high density (2: (keV)>1014cm-3) And (3) stably restraining the plasma for a long time (more than or equal to 100 seconds). The current research shows that the plasmaMicro random disturbance in the daughter, transport caused by turbulence, has a decisive influence on the confinement performance of magnetic confinement fusion. Its existence makes the plasma particle transport and thermal transport levels far higher than expected by new classical transport theory, the main reason for the difficulty in raising the level of confinement. Therefore, physical research on turbulent transport is one of the main research subjects of magnetic confinement nuclear fusion.
Due to the limitation of the size and parameters of the existing magnetic confinement fusion device, the ratio of the dynamic pressure intensity of the plasma to the magnetic pressure intensity, namely the specific pressure, is small, the characteristics of turbulent flow transportation are mainly determined by electrostatic effect, and the measurement and research on turbulent flow are mainly focused on electrostatic measurement. However, in the future international thermonuclear fusion experimental reactor (ITER), as the specific pressure value is increased, the influence of the magnetic effect of the turbulent flow on the transportation becomes more and more important. Therefore, the measurement of the turbulent electromagnetic composite characteristics is a basic means for researching turbulent transport in the future.
At present, the measurement of turbulent electromagnetic characteristics in a magnetic confinement fusion device is mostly carried out independently on electrostatic characteristics and magnetic characteristics, and a typical Langmuir electrostatic probe is adopted for electrostatic measurement.
Although these probes are capable of measuring electrostatic and magnetic characteristics in a plasma, the currently used composite probes either measure only a single electrostatic or magnetic characteristic, or they do not have the same spatial location for both electrostatic and magnetic measurements, and they are not capable of simultaneously and fully measuring the electromagnetic properties of a plasma at the same location.
The center of the tokamak is an annular vacuum chamber, a coil is wound outside the tokamak, a huge spiral magnetic field can be generated inside the tokamak when the tokamak is electrified, and the plasma is heated to a high temperature and maintained for a necessary time by the restraint of the magnetic field and other heating means, so that the aim of realizing nuclear fusion is fulfilled. However, in the process of measuring the tokamak boundary magnetic field and the plasma parameters, due to the ultrahigh temperature, the measurement time on the nuclear fusion experimental device is greatly increased and the risk is higher in the one-to-one measurement process of the ion saturated flow, the electron temperature, the density, the plasma potential, the radial electric field, the polar electric field, the annular mach number, the radial magnetic field, the polar magnetic field and the annular magnetic field. And because the tokamak boundary parameters have small-scale high-frequency transient disturbance, the measurement of the parameters one by one cannot realize the measurement of the same small-scale high-frequency transient disturbance parameters.
Disclosure of Invention
The invention provides an electromagnetic composite probe for plasma electromagnetic characteristic diagnosis, which can be used for simultaneously measuring ion saturated flow, electron temperature, density, plasma potential, radial electric field, polar electric field, annular Mach number, radial magnetic field, polar magnetic field and annular magnetic field of a plasma at the same local position, is arranged in a ladder shape, can simultaneously measure different spatial positions, greatly shortens the measurement time on a nuclear fusion experimental device, remarkably improves the safety performance, and can simultaneously realize the measurement of the same small-scale high-frequency transient disturbance parameter.
The technical scheme adopted by the invention is as follows: an electromagnetic composite probe for plasma electromagnetic characteristic diagnosis is applied to a Tokamak magnetic confinement nuclear fusion experimental device and comprises a double-probe pair, a suspension potential probe, a Mach probe pair and a magnetic probe;
the magnetic probe is used for measuring a three-dimensional magnetic field in the local radial direction, the polar direction and the annular direction of the plasma;
the Mach probes are arranged on two sides of the magnetic probe in a halving manner and are arranged along the circumferential direction of the magnetic field;
the number of the suspension potential probes is three, the three suspension potential probes are all arranged on one side of the magnetic probe, and the three suspension potential probes are arranged along the polar direction and the radial direction of an electric field;
the double-probe pair is arranged on one side of the magnetic probe and used for measuring the voltage to ground and the saturated ion flow of the plasma;
one side of each magnetic probe is in a step shape, one Mach probe and two suspended potential probes of the Mach probe pair are located on the upper end face of the step close to the magnetic probes, and the double probe pair and the third suspended potential probe are located on the lower end face of the step far away from the magnetic probes.
When the scheme is operated specifically, whereinMach probe is to: by applying a constant negative bias to ground to the probe, the probe is made to indicate the formation of an ion sheath, repelling electrons and accepting ions. When the bias voltage is high enough, the probe current is saturated, and the current is the saturated ion current Isi. A pair of probes which are arranged along the Tokamak ring direction and only face the upstream and the downstream respectively form a ring Mach probe pair, and the saturated ion current facing the upstream and the downstream is respectively measured: i issi upstreamAnd IDownstream of siAnd the ratio of the two can be used for measuring the annular Mach number.
Suspension potential probe: the probe is suspended in plasma and has a suspension potential V to groundf。
The double probe pair: loading constant bias voltage between two probes to make one probe in ion saturation region and another in transition region, measuring the voltages to earth of two probes at this time as V + and V-, respectively, and measuring plasma saturated ion current Isi。
According to the probe principle, the effective measurement area S, the sampling resistance R and the ion sound velocity C of the probe are combinedsThe plasma static related parameters can be calculated as follows: electron temperature: t ise＝(V+-Vf) /ln 2; density of
Potential V of plasmap＝Vf+2.8Te(ii) a Annular Mach number I of plasmasi upstream/IDownstream of si。
A typical milloff magnetic probe is used for magnetic measurement, and according to the principle of electromagnetic induction, the voltage measured by the solenoid is equal to the rate of change V of the magnetic flux passing through the solenoid, dB/dt, inverting the magnetic field change.
The electromagnetic composite probe in the scheme is composed of a stepped electrostatic probe array and magnetic probes, wherein the stepped electrostatic probe array comprises double probe pairs, a suspension potential probe and a Mach probe pair, the two Mach probes of the Mach probe pair are respectively arranged on two sides of the magnetic probes and are arranged along the Tokamak ring direction, the double probe pairs and the suspension potential probe are both positioned on one side of the magnetic probes and distributed in a step shape, one Mach probe and two suspension potential probes of the Mach probe pair are arranged on the upper end face of a step close to one side of the magnetic probes, the Mach probes are positioned between the two suspension potential probes, a double probe pair and a third suspension potential probe are arranged on the lower end face of the step far away from one side of the magnetic probes, and the third suspension potential probe is positioned between the double probe pairs.
Three suspension potential probes which are distributed in a polar direction and a radial direction measure a local radial electric field and a polar direction electric field of the plasma; a pair of double probes measures the local plasma density and the electron temperature by combining the suspension potential probe; the circumferentially distributed Mach probes measure the local circumferential rotation of the plasma, and the magnetic probes measure the local radial, polar and circumferential three-dimensional magnetic fields of the plasma; and measuring the electromagnetic turbulence parameters at the same local position by combining the step type electrostatic probe array and the magnetic probe.
Preferably, the magnetic probes are three-dimensional milloff magnetic probes, the three-dimensional milloff magnetic probes comprise spiral pipes wound in the radial direction, the polar direction and the annular direction respectively, the number of the three-dimensional milloff magnetic probes is two, and the two three-dimensional milloff magnetic probes are arranged in the radial direction.
When the scheme is operated, the magnetic probe is a three-dimensional Millloff magnetic probe and consists of two groups of solenoids in three directions, namely radial direction, polar direction and annular direction, the spiral pipe is wound on a boron nitride cylinder, each group of three-dimensional Millloff magnetic probe is formed by winding the solenoids in three directions on the same boron nitride cylinder in different directions, and the two groups of three-dimensional Millloff magnetic probes are arranged in a radial direction.
The Mach probe pair, the suspension potential probe and the double-probe pair are all inserted into different counter bores.
When this scheme specifically functions, still be equipped with the insulation support body, the front end of insulation support body has the cuboid arch, places the magnetic probe inside the cuboid arch, has a plurality of counter bores on the insulation support body of the protruding both sides of cuboid, and counter bore and mach probe are to, the position one-to-one that suspension potential probe and two probe are to, make the probe all alternate in the counter bore of one-to-one, wherein the insulation support body makes mutual insulation between every probe.
Further preferably, the insulating support body is made of boron nitride.
Further optimizing, still include graphite sheath, insulating supporter is located to the graphite sheath cover, the size of graphite sheath and insulating supporter's size looks adaptation.
When this scheme specifically functions, still be equipped with the graphite sheath, including the graphite sheath is established insulating support body cover, magnetic probe, insulating support body and graphite sheath are nested the setting in proper order from inside to outside, and the graphite sheath front end also has the cuboid arch, and the size looks adaptation of its size and insulating support body, graphite sheath mainly used shield external plasma.
Preferably, the end of the graphite sheath is provided with a plurality of through holes, and the Mach probe pair, the suspension potential probe and the double probe pair penetrate through the counter bore and the through holes.
When this scheme specifically functions, have a plurality of through-holes in the protruding both sides of cuboid of graphite sheath front end, the position one-to-one of through-hole and counter bore makes mach probe pair, suspension potential probe and two probe pairs all pass counter bore and through-hole, and the syringe needle of all probes all surpasss the through-hole, is located graphite sheath front end outside.
Preferably, one side of the end part of the graphite sheath is provided with a step matched with the step of one side of the magnetic probe.
When this scheme is specifically operated, for the spatial position of matching magnetic probe one side echelonment, graphite sheath tip one side also has the step with magnetic probe one side echelonment looks adaptation, makes the probe syringe needle homoenergetic on ladder up end and the lower terminal surface exceed the through-hole to measure the spatial position of difference simultaneously.
Further preferably, the geometric center of the part of the Mach probe pair, which protrudes from the graphite sheath, and the geometric center of the magnetic probe are located at the same radial position.
Further optimizing, the geometric centers of all the probe needles on the upper end surface of the ladder and the geometric center of the magnetic probe are in the same plane.
Further optimizing, still include the stainless steel supporter, stainless steel supporter and graphite sheath one side are connected.
The invention has the following beneficial effects:
this scheme provides an electromagnetism composite probe for plasma electromagnetic characteristic diagnosis, adopt this scheme, can be used to the ion saturation flow of the same local position of simultaneous measurement plasma, electron temperature, density, plasma electric potential, radial electric field, the polar direction electric field, the hoop mach number, radial magnetic field, polar direction magnetic field and hoop magnetic field, and arrange for the echelonment, can measure different spatial position simultaneously, very big reduction the measuring time on nuclear fusion experimental apparatus, the security performance is showing and is improving, also can realize the measurement to same small-size high frequency transient disturbance parameter simultaneously.
Drawings
FIG. 1 is a schematic structural diagram of an electromagnetic composite probe for diagnosing electromagnetic properties of plasma according to the present invention;
FIG. 2 is a schematic structural diagram of an electromagnetic composite probe-insulating support for diagnosing electromagnetic properties of plasma according to the present invention;
fig. 3 is a schematic structural diagram of an electromagnetic composite probe-magnetic probe for diagnosing electromagnetic characteristics of plasma according to the present invention.
The reference numbers in the figures are: the probe comprises a 1-double probe pair, a 2-suspension potential probe, a 3-Mach probe, a 4-magnetic probe, a 5-graphite sheath, a 6-stainless steel support body and a 7-insulating support body.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example (b): as shown in fig. 1 to 3, an electromagnetic composite probe for plasma electromagnetic characteristic diagnosis is applied to a tokamak magnetic confinement nuclear fusion experimental device, and comprises a double-probe pair 1, a suspended potential probe 2, a mach probe 3 pair and a magnetic probe 4;
the magnetic probe 4 is used for measuring the three-dimensional magnetic field of the plasma in the local radial direction, the polar direction and the annular direction;
the Mach probe 3 is arranged on two sides of the magnetic probe 4 in a halving manner and is arranged along the circumferential direction of the magnetic field;
the number of the suspension potential probes 2 is three, the three suspension potential probes 2 are all arranged on one side of the magnetic probe 4, and the three suspension potential probes 2 are arranged along the polar direction and the radial direction of an electric field;
the double-probe pair 1 is arranged on one side of the magnetic probe 4 and used for measuring the voltage to ground and the saturated ion flow of the plasma;
one side of the magnetic probe 4 is in a step shape, one Mach probe 3 and two suspended potential probes 2 of the Mach probe 3 pair are both positioned on the upper end face of the step close to the magnetic probe 4, and the double probe pair 1 and the third suspended potential probe 2 are both positioned on the lower end face of the step far away from the magnetic probe 4.
Wherein the Mach probe pair is 3: by applying a constant negative bias to ground to the probe, the probe is made to indicate the formation of an ion sheath, repelling electrons and accepting ions. When the bias voltage is high enough, the probe current is saturated, and the current is the saturated ion current Isi. A pair of probes arranged circumferentially along the tokamak and respectively facing only upstream and downstream form a circumferential mach probe pair 3 for respectively measuring the saturated ion flow facing upstream and downstream: i issi upstreamAnd IDownstream of siAnd the ratio of the two can be used for measuring the annular Mach number.
Suspension potential probe 2: the probe is suspended in plasma and has a suspension potential V to groundf。
The double probe pair 1: loading constant bias voltage between two probes to make one probe in ion saturation region and another in transition region, measuring the voltages to earth of two probes at this time as V + and V-, respectively, and measuring plasma saturated ion current Isi。
According to the probe principle, the effective measurement area S, the sampling resistance R and the ion sound velocity C of the probe are combinedsThe plasma static related parameters can be calculated as follows: electron temperature: t ise＝(V+-Vf) /ln 2; density of
Potential V of plasmap＝Vf+2.8Te(ii) a Annular Mach number I of plasmasi upstream/IDownstream of si。
A typical milloff magnetic probe 4 is used for magnetic measurement, and the voltage measured by the solenoid is equal to the rate of change V of the magnetic flux through the solenoid, dB/dt, inverting the magnetic field change according to the principle of electromagnetic induction.
In this embodiment, the electromagnetic composite probe is composed of a stepped electrostatic probe array and a magnetic probe 4, wherein the step type electrostatic probe array comprises a double probe pair 1, a suspension potential probe 2 and a Mach probe 3 pair, two Mach probes 3 of the Mach probe 3 pair are respectively arranged at two sides of a magnetic probe 4 and are arranged along the Tokamak ring direction, wherein the double probe pairs 1 and the suspension potential probes 2 are both positioned at one side of the magnetic probe 4 and distributed in a ladder shape, one Mach probe 3 and two suspension potential probes 2 of the Mach probe 3 pair are arranged on the upper end surface of the ladder close to one side of the magnetic probe 4, the Mach probe 3 is positioned between the two suspension potential probes 2, the lower end face of the ladder far away from one side of the magnetic probe 4 is provided with a double-probe pair 1 and a third suspension potential probe 2, and the third suspension potential probe 2 is positioned between the double-probe pair 1.
Three suspension potential probes 2 which are distributed in a polar direction and a radial direction measure a local radial electric field and a polar direction electric field of the plasma; a pair of double probes measures the local plasma density and the electron temperature by combining the pair of double probes 1 with the suspension potential probe 2; the Mach probes 3 distributed annularly rotate the plasma to be measured locally and annularly, and the magnetic probes 4 measure the plasma locally radial, polar and annular three-dimensional magnetic fields; measuring electromagnetic turbulence parameters at the same local position by combining the step type electrostatic probe array and the magnetic probe 4; the double probe pairs 1, the suspension potential probe 2 and the Mach probe pair 3 have the same structure, and the diameter of the top needle head is 2-4 mm, and the length is 3-10 mm; the diameter of the middle part is 3 mm-6 mm, and the length is 5 mm-10 mm; the diameter of the bottom is 2 mm-4 mm, and the length is 2 mm-5 mm.
In this embodiment, the magnetic probe 4 is a three-dimensional milov magnetic probe 4, which is composed of two sets of solenoids in three directions, radial direction, polar direction and circular direction, the solenoid is wound on a boron nitride cylinder, each set of three-dimensional milov magnetic probe 4 is composed of solenoids in three directions wound on the same boron nitride cylinder in different directions, the two sets of three-dimensional milov magnetic probes 4 are arranged in radial direction, and the solenoid is composed of three sets of parameters: 8 mm-15 mm multiplied by 8 mm-15 mm, 10-50 turns of solenoid are respectively wound and combined in the three-dimensional direction.
In the embodiment, an insulating support body 7 is further arranged, and the front end of the insulating support body 7 is provided with a cuboid bulge, wherein the insulating support body 7 is of a cuboid structure, the length is 100-150 mm, the width is 20-50 mm, and the height is 14-20 mm; the length of the cuboid bulge at the front end is 10 mm-12 mm, the bulge width is 10 mm-12 mm, and the bulge height is 14 mm-20 mm; the magnetic probe 4 is built into the cuboid protrusion. The front end of the support insulator 7 is arranged on two sides of the boss of the cuboid respectively with 1 and 6 counter bores, the diameter of each counter bore is 2 mm-4 mm, the depth is 10, mm-25 mm, the support insulator is connected with the twin probe pairs 1, the suspension potential probe pairs 2 and the Mach probe pairs 3, the counter bores and the Mach probe pairs 3, the suspension potential probe pairs 2 and the twin probe pairs 1 are in one-to-one correspondence, the probes are all inserted in the counter bores in one-to-one correspondence, and the insulation support body 7 enables the probes to be insulated from each other.
In this embodiment, the insulating support 7 is made of boron nitride.
In this embodiment, still be equipped with graphite sheath 5, including graphite sheath 5 establishes insulating support 7 cover, magnetic probe 4, insulating support 7 and graphite sheath 5 set up from inside to outside nestification in proper order, and graphite sheath 5 front end also has the cuboid arch, and its size and insulating support 7's size looks adaptation, and graphite sheath 5 is mainly used for shielding external plasma. Wherein the graphite sheath is of a cuboid structure, the length is 100-150 mm, the width is 24-54 mm, and the height is 16-22 mm; the front end of the bracket is provided with a cuboid bulge, the length of the bulge is 10 mm-12 mm, the width of the bulge is 12 mm-14 mm, and the height of the bulge is 16 mm-22 mm.
In this embodiment, the front end of the graphite sheath 5 is arranged on two sides of the cuboid boss and is provided with 1 through hole and 6 through holes respectively, the through holes correspond to the counter bores of the boron nitride insulating support body 7 in a one-to-one manner, the diameters of the through holes are 2 mm-4 mm, so that the Mach probe pair 3, the suspension potential probe 2 and the double probe pair 1 all penetrate through the counter bores and the through holes, the needle heads of all the probes all exceed the through holes and are located outside the front end of the graphite sheath 5.
In this embodiment, for the spatial position of matching 4 one side echelonment of magnetic probe, 5 tip one sides of graphite sheath also have the step of 4 one side echelonment looks adaptations of magnetic probe, wherein possess 6 through-holes one side and be the notch cuttype and distribute, step height 1.5 ~ 3.5mm, make the probe syringe needle homoenergetic on ladder up end and the lower terminal surface exceed the through-hole to measure different spatial positions simultaneously.
In this embodiment, the geometric center of the portion of the mach probe 3 pair where the tip protrudes from the graphite sheath 5 and the geometric center of the magnetic probe 4 are located at the same radial position.
In this embodiment, the geometric centers of all the probe tips of the step upper end face and the geometric center of the magnetic probe 4 are in the same plane.
In this embodiment, the graphite sheath further comprises a stainless steel support body 6, and the stainless steel support body 6 is connected with one side of the graphite sheath 5.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An electromagnetic composite probe for plasma electromagnetic characteristic diagnosis is characterized by being applied to a Tokamak magnetic confinement nuclear fusion experimental device and comprising a double-probe pair (1), a suspension potential probe (2), a Mach probe pair (3) and a magnetic probe (4);
the magnetic probe (4) is used for measuring the three-dimensional magnetic field of the plasma in the local radial direction, the polar direction and the annular direction;
the Mach probe pairs (3) are respectively arranged at two sides of the magnetic probe (4) and are arranged along the circumferential direction of the magnetic field;
the number of the suspension potential probes (2) is three, the three suspension potential probes (2) are arranged on one side of the magnetic probe (4), and the three suspension potential probes (2) are arranged along the polar direction and the radial direction of an electric field;
the double-probe pair (1) is arranged on one side of the magnetic probe (4) and used for measuring the voltage to ground and the saturated ion flow of the plasma;
one side of each magnetic probe (4) is in a step shape, one Mach probe and two suspended potential probes (2) of each Mach probe pair (3) are located on the upper end face of the step close to the magnetic probe (4), and the double probe pairs (1) and the third suspended potential probe (2) are located on the lower end face of the step far away from the magnetic probe (4).
2. The electromagnetic composite probe for plasma electromagnetic property diagnosis according to claim 1, wherein the magnetic probe (4) is a three-dimensional milloff magnetic probe comprising spiral tubes wound in a radial direction, a polar direction and a circumferential direction, respectively, and the three-dimensional milloff magnetic probe is two, and the two three-dimensional milloff magnetic probes are arranged in a radial direction.
3. The composite electromagnetic probe for diagnosing the electromagnetic characteristics of plasma according to claim 1, further comprising an insulating support body (7), wherein a protrusion is arranged at the end of the insulating support body (7), the magnetic probe (4) is arranged inside the protrusion, a plurality of counter bores are arranged on the insulating support body (7) and are respectively arranged at two sides of the protrusion, and the Mach probe pair (3), the floating potential probe (2) and the double probe pair (1) are inserted into different counter bores.
4. A composite electromagnetic probe for diagnosing its electromagnetic properties in plasma according to claim 3, characterized in that said insulating support (7) is made of boron nitride.
5. The composite electromagnetic probe for diagnosing the electromagnetic property of plasma according to claim 3, further comprising a graphite sheath (5), wherein the graphite sheath (5) is sleeved on the insulating support (7), and the size of the graphite sheath (5) is matched with the size of the insulating support (7).
6. The electromagnetic composite probe for plasma electromagnetic characteristic diagnosis according to claim 5, characterized in that the graphite sheath (5) has a plurality of through holes at its end, and the Mach probe pair (3), the floating potential probe (2) and the dual probe pair (1) all pass through the counter bore and the through holes.
7. The electromagnetic composite probe for plasma electromagnetic characteristic diagnosis according to claim 6, wherein the graphite sheath (5) has a step on one side of its end portion matching with the step on one side of the magnetic probe (4).
8. The electromagnetic composite probe for plasma electromagnetic property diagnosis according to claim 6, wherein the geometric center of the portion of the Mach probe pair (3) where the tip of the graphite sheath (5) protrudes and the geometric center of the magnetic probe (4) are located at the same radial position.
9. A composite electromagnetic probe for diagnosing the electromagnetic characteristics of plasma according to claim 1, wherein the geometric centers of all the probe tips of the stepped upper end surface and the geometric center of the magnetic probe (4) are in the same plane.
10. The electromagnetic composite probe for plasma electromagnetic property diagnosis according to claim 5, further comprising a stainless steel support body (6), wherein the stainless steel support body (6) is connected with one side of the graphite sheath (5).
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| CN113438788B (en) * | 2021-07-07 | 2022-08-30 | 核工业西南物理研究院 | Multi-step electrostatic probe |
| CN113536211B (en) * | 2021-07-24 | 2024-02-06 | 大连理工大学 | Numerical method for fast extraction of EAST tokamak magnetic signals |
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