CN104994672A - Cylindrical probe used for plume measurement of magnetic plasma thrustor - Google Patents
Cylindrical probe used for plume measurement of magnetic plasma thrustor Download PDFInfo
- Publication number
- CN104994672A CN104994672A CN201510292007.XA CN201510292007A CN104994672A CN 104994672 A CN104994672 A CN 104994672A CN 201510292007 A CN201510292007 A CN 201510292007A CN 104994672 A CN104994672 A CN 104994672A
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- hole
- probe
- earthenware
- single hole
- protection tube
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Abstract
The invention discloses a cylindrical probe used for plume measurement of a magnetic plasma thrustor. The cylindrical probe includes single probe modules, a four-hole ceramic tube and a Langmuir probe protection tube module. The single probe module includes a thick single-hole ceramic tube, a thin single-hole ceramic tube and a tungsten filament. One end of the thin single-hole ceramic tube and one end of the thick single-hole ceramic tube are flush to each other and are fixed to each other. The tungsten filament is inserted to the thin single-hole ceramic tube. An end face of the four-hole ceramic tube is provided with four through holes. Three identical single probe modules are inserted into three of the four through holes. The Langmuir probe protection tube module includes a protection tube, a flat gasket, a fastening screw, a nut and a spring gasket. The four-hole ceramic tube with the fixed single probe modules is inserted from the protection tube and gets fixed. The cylindrical probe provided by the invention has advantages that the four-hole ceramic tube, the thick single-hole ceramic tube, the thin single-hole ceramic tube and the tungsten filament made of aluminum oxide which is common in market can bear plume temperature of the magnetic plasma thrustor; structural stability can be kept through clearance fit; and the cylindrical probe is simple in structure.
Description
Technical field
The invention belongs to electric propulsion plasma measurement field, specifically refer to a kind of column type probe measured for magnetic plasma propeller plume.
Background technology
Electric propulsion is that a class utilizes the direct heat propellant of electric energy or utilizes electromagnetic action to ionize acceleration propellant to obtain the advanced propulsion mode of thrust power, there is higher specific impulse, thrust and efficiency, especially magnetic plasma propeller has high specific impulse, high thrust and high efficiency advantage, has broad application prospects in the orbits controlling, the space tasks such as survey of deep space and interplanetary flight of Large Spacecraft.
The measurement plume plasma of magnetic plasma propeller being carried out to relevant parameter is significant for optimization engine design, raising engine performance.The method using column type Langmuir probe to measure plasma parameter is the most basic method, belongs to contact measurement method.But because magnetic plasma propeller plume plasma temperature is higher, high requirement is proposed to column type Langmuir probe, and column type Langmuir probe price is in the market costly.
Summary of the invention
The present invention is directed in existing probe, the one-point measurement to magnetic plasma propeller plume plasma can not be realized, do not tolerate the shortcomings such as the high temperature of magnetic plasma propeller plume and sputtering simultaneously, propose a kind of column type probe measured for magnetic plasma propeller plume, measure electron temperature and the electron number densitiy of magnetic plasma propeller plume.
The column type probe measured for magnetic plasma propeller plume provided by the invention, comprises Single probe module, four hole earthenwares and Langmuir probe protection tube module;
Described Single probe module comprises thick single hole earthenware, thin single hole earthenware and tungsten filament;
The material of thick single hole earthenware and thin single hole earthenware is aluminium oxide ceramics, adopts circular ring structure; The external diameter of thin single hole earthenware is identical with the internal diameter of thick single hole earthenware, and thin single hole earthenware inserts thick single hole earthenware, matched in clearance, and concordant with thick single hole earthenware one end fixing;
Tungsten filament adopts cylindrical, and diameter is identical with thin single hole earthenware internal diameter, and tungsten filament inserts thin single hole earthenware, matched in clearance, and tungsten filament one end is fixed with the concordant end 12mm of thin single hole earthenware apart from thick single hole earthenware; The other end stretches out thin single hole earthenware and collection signal wire bonding.
Four hole earthenwares are aluminium oxide ceramics, adopt cylindrical structure, cylindrical end face has vertically 4 through holes, composition square shape, 4 through hole centers lay respectively on foursquare 4 summits, any two adjacent through-hole spacings are identical, and foursquare center overlaps with the center of circle of four hole earthenwares.
The external diameter of thick single hole earthenware is identical with the diameter of four hole earthenware through holes, 3 identical Single probe modules are inserted any three through holes in four through holes of four hole earthenwares, adopt matched in clearance, and make the concordant end of thick single hole earthenware with thin single hole earthenware and one end flush seal of four hole earthenwares, ensure that tungsten filament stretches out concordant end 10mm.
Langmuir probe protection tube module comprises protection tube, flat shim, holding screw, nut and spring shim;
The stainless steel tube of the overall annular different by two sections of external diameters of Langmuir probe protection tube is welded, and the side of this protection tube has screwed hole, for fixedly mounting four hole earthenwares.
The four hole earthenwares fixing Single probe module are inserted from the Langmuir probe protection tube end of thread; the screwed hole of Langmuir probe protection tube side is screwed into after holding screw is inserted in nut, spring shim, flat shim successively; screw separately respectively, Single probe module and four hole earthenwares and Langmuir probe protection tube module are fixed together.
The invention has the advantages that:
1, for the column type probe that magnetic plasma propeller plume is measured, the four hole earthenwares adopting alumina ceramic material common on market to be shaped, thick single hole earthenware, thin single hole earthenware and tungsten filament, market is easy to buy, with low cost;
2, a kind of column type probe measured for magnetic plasma propeller plume, ensure that tungsten filament and all earthenware holding structures are stablized by the matched in clearance between tungsten filament and thin single hole earthenware, the matched in clearance between thin single hole earthenware and thick single hole earthenware, thick matched in clearance between single hole earthenware and four hole earthenwares, and utilize epoxide-resin glue to be fixed, utilize high temperature inorganic glue to sealing gap and the probe length of guarantee measurement simultaneously.Tungsten filament is stablized by three matched in clearance and four hole earthenware holding structures, and structure is simple;
3, for the column type probe that magnetic plasma propeller plume is measured, the alumina ceramic material adopted and tungsten material all can stand the plume temperature of magnetic plasma propeller.
Accompanying drawing explanation
Fig. 1 is the column type probe schematic diagram measured for magnetic plasma propeller plume;
Fig. 2 is the column type probe Single probe module diagram measured for magnetic plasma propeller plume;
Fig. 3 is the column type probe Langmuir probe protection tube module diagram measured for magnetic plasma propeller plume;
Fig. 4 is the column type probe schematic diagram measured for magnetic plasma propeller plume;
In figure: 1--Single probe module; 2--tetra-hole earthenware; 3--Langmuir probe protection tube module; 101--tungsten filament; The thick single hole earthenware of 102--; The thin single hole earthenware of 103--; 301--protection tube; 302--flat shim; 303--holding screw; 304--nut; 305--spring shim;
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
A kind of column type probe measured for magnetic plasma propeller plume provided by the invention, relates to a kind of contact measurement method plasma that uses and carries out the electrostatic probe measured.
The described column type probe measured for magnetic plasma propeller plume, as shown in Figure 1, comprises Single probe module 1, four hole earthenware 2 and Langmuir probe protection tube module 3,
Described Single probe module 1 as shown in Figure 2, comprises tungsten filament 101, thick single hole earthenware 102 and thin single hole earthenware 103;
The material of thick single hole earthenware 102 and thin single hole earthenware 103 is aluminium oxide ceramics, adopts circular ring structure; Thick single hole earthenware 102 entirety is long is 70mm, and external diameter is 2mm, and internal diameter is 1mm; The overall long 75mm of thin single hole earthenware 103, external diameter is 1mm, and internal diameter is 0.3mm.
The material of tungsten filament 101 is tungsten, adopts cylindrical, overall long 100mm, diameter 0.3mm, and end face uses linear cutter.
The external diameter of thin single hole earthenware 103 is identical with the internal diameter of thick single hole earthenware 102, and thin single hole earthenware 103 inserts thick single hole earthenware 102, matched in clearance, and thin single hole earthenware 103 is concordant with thick single hole earthenware 102 one end, fixes with high-temperature resin glue;
Tungsten filament 101 diameter is identical with thin single hole earthenware 103 internal diameter, tungsten filament 101 inserts thin single hole earthenware 103, matched in clearance, the concordant end 12mm place of thick single hole earthenware 102 and thin single hole earthenware 103 is stretched out in tungsten filament 101 one end, and tungsten filament 101 and thin single hole earthenware 103 is fixed with high-temperature resin glue; It is 13mm that tungsten filament 101 other end stretches out thin single hole earthenware 103, with collection signal wire bonding after crotch.
The material of four hole earthenwares 2 is aluminium oxide ceramics, and adopt cylindrical structure, overall long 80mm, diameter is 8mm, has 4 through holes vertically at the cylindrical sides of four hole earthenwares 2; The diameter of through hole is 2mm, 4 through holes connect together composition square shape, and the center of 4 through holes lays respectively on foursquare 4 summits, and the square length of side of composition is 4mm, i.e. any two adjacent through-hole spacing 2mm, foursquare center overlaps with the center of circle of four hole earthenwares 2.
The external diameter of thick single hole earthenware 102 is identical with the diameter of four hole earthenware 2 through holes, 3 identical Single probe modules 1 to be inserted in four through holes of four hole earthenwares 2 any three, adopt matched in clearance, and make thick single hole earthenware 102 concordant with one end of four hole earthenwares 2 with the concordant end of thin single hole earthenware 103, concordant end high temperature inorganic glue sealing, high temperature inorganic glue thickness 2mm, tungsten filament 101 stretches out concordant end 10mm, can maximized measurement plasma.
Langmuir probe protection tube module 3 as shown in Figure 3, comprises protection tube 301, flat shim 302, holding screw 303, nut 304 and spring shim 305;
Langmuir probe protection tube 301 entirety is welded by the stainless steel tube of the different annular of two sections of external diameters, and internal diameter is 9mm.External diameter is divided into two sections, and one section of external diameter is 12mm, long 25mm, is used for machining screw, connects miscellaneous part; Another section of external diameter is 16mm, and long 40mm has screwed hole on the side of this section of external diameter, for having fixedly mounted four hole earthenwares 2 of Single probe module 1.
As shown in Figure 4; the four hole earthenwares 2 fixing Single probe module 1 are inserted from Langmuir probe protection tube 301 end of thread; the screwed hole of Langmuir probe protection tube 301 side is screwed into after holding screw 303 is inserted in nut 304, spring shim 305, flat shim 302 successively; screw separately respectively, Single probe module 1 and four hole earthenwares 2 and Langmuir probe protection tube module 3 are fixed together.
For a measuring circuit for the column type probe that magnetic plasma propeller plume is measured, 3 Single probe modules 1 are set as probe P1 respectively, probe P2 and probe P3; 3 probes lay respectively at foursquare 3 summits, and wherein do not install the diagonal position of the through hole of probe, the probe of installation is probe P1, and the position of probe P2 and probe P3 can exchange, and loads bias voltage V between probe P1 and probe P3
d3, between probe P2 and probe P1, load measuring voltage V
d2; By the measuring voltage V between measuring probe P2 and probe P1
d2with the electric current I flowing through probe P1
1obtain electron temperature and the electron number densitiy of magnetic plasma propeller plume.
The electric current flowing into 3 probes can be expressed as:
-I
1＝-A[J
eexp(-φV
1)-J
i(V
1)] (1)
I
2＝-A[J
eexp(-φV
2)-J
i(V
2)] (2)
I
3＝-A[J
eexp(-φV
3)-J
i(V
3)] (3)
Wherein, I
1, I
2, I
3the current value that corresponding 3 probes P1, P2 and P3 are corresponding respectively; Meet: I
1=I
2+ I
3;
V
1, V
2, V
3the magnitude of voltage that 3 probes P1, P2 and P3 are corresponding respectively; Meet measuring voltage V
d2=V
2-V
1; Bias voltage V
d3=V
3-V
1;
A is probe area, J
iion current density, J
espread the electronics saturation current density flowing into probe, φ ≡ e/ (kTe) by hot electron,
k is Boltzmann constant, and e is electron charge, T
eelectron temperature, m
eit is electron mass; n
efor electron number densitiy;
Suppose the ion saturation current J caused because probe potential changes
i(V) change is very little compared with the change of electronics saturation current, ignores, i.e. J
i(V
1) ≈ J
i(V
2) ≈ J
i(V
3)=J
i,
Simultaneous can obtain V
d2and V
d3relation:
In three probes, probe P2 suspends, so I
2=0, I
1=I
3=I, so obtain:
In formula (5), V
d3be given, the present invention chooses 30V, V
d2be experimental measurements, scope, at 0-15V, solves the T in implicit equation (5)
enamely electron temperature is obtained.
Be positioned at the ion saturation current density J at sheaths edge
isby electron temperature T
ewith ion temperature T
ibetween relation obtain,
If T
e> > T
i, ion saturation current density J
isfor
If
ion saturation current density J
isfor
Wherein, m
ifor mass of ion, n
ihfor the ion number density at sheaths edge.
Use electron temperature T
ebe similar to and obtain ion saturation current density J
is, and the electron temperature T in two kinds of situations
ewith ion temperature T
ibe Speed of diffusion but not directional movement speed, and electron mass m
emuch smaller than mass of ion m
i, therefore there will not be T
e< < T
isituation.
Suppose that plasma obeys Bohm sheaths criterion at sheaths edge electronic, then plasma arc voltage
Simultaneously sheaths edge electronic obeys Maxwellian distribution, has the ion number density at sheaths edge to be:
Plasma is that class is neutral at sheaths edge, and namely the electron number densitiy at sheaths edge equals the ion number density at sheaths edge,
then
If sheaths area approximation equals probe area, substitute into formula (6), can obtain
From aforementioned, I
2=0, I
1=I
3=I, has
In formula (6), m
ifor mass of ion, after equivalent substitution, can electron number densitiy be obtained:
Claims (5)
1., for the column type probe that magnetic plasma propeller plume is measured, it is characterized in that: comprise Single probe module, four hole earthenwares and Langmuir probe protection tube module;
Described Single probe module comprises thick single hole earthenware, thin single hole earthenware and tungsten filament;
The external diameter of thin single hole earthenware is identical with the internal diameter of thick single hole earthenware, and thin single hole earthenware inserts thick single hole earthenware, matched in clearance, and concordant with thick single hole earthenware one end fixing;
Tungsten filament diameter is identical with thin single hole earthenware internal diameter, and tungsten filament inserts thin single hole earthenware, matched in clearance, and tungsten filament one end is fixed apart from the concordant end of thick single hole earthenware with thin single hole earthenware; The other end stretches out thin single hole earthenware and collection signal wire bonding;
Four hole ceramic tube inside have 4 through holes vertically, the external diameter of thick single hole earthenware is identical with the diameter of four hole earthenware through holes, 3 identical Single probe modules are inserted any three through holes of four hole earthenwares, adopt matched in clearance, and the thick concordant end of single hole earthenware with thin single hole earthenware and one end flush seal of four hole earthenwares;
Langmuir probe protection tube module comprises protection tube, flat shim, holding screw, nut and spring shim;
The side of protection tube has screwed hole, for fixedly mounting four hole earthenwares; The four hole earthenwares fixing Single probe module are inserted from the Langmuir probe protection tube end of thread; the screwed hole of Langmuir probe protection tube side is screwed into after holding screw is inserted in nut, spring shim, flat shim successively; screw separately respectively, Single probe module and four hole earthenwares and Langmuir probe protection tube module are fixed together.
2. as claimed in claim 1 a kind of for magnetic plasma propeller plume measure column type probe, it is characterized in that: described thick single hole earthenware and the material of thin single hole earthenware are aluminium oxide ceramics, cross section adopt circular ring structure.
3. as claimed in claim 1 a kind of for magnetic plasma propeller plume measure column type probe, it is characterized in that: four described hole earthenwares are aluminium oxide ceramics, adopt cylindrical structure.
4. as claimed in claim 1 a kind of for magnetic plasma propeller plume measure column type probe, it is characterized in that: 4 described sets of vias quadrate shapes, 4 through hole centers lay respectively on foursquare 4 summits, any two adjacent through-hole spacings are identical, and foursquare center overlaps with the center of circle of four hole earthenwares.
5. a kind of column type probe measured for magnetic plasma propeller plume as claimed in claim 1, is characterized in that: the stainless steel tube of the overall annular different by two sections of external diameters of described Langmuir probe protection tube is welded.
Priority Applications (1)
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|---|---|---|---|
| CN201510292007.XA CN104994672B (en) | 2015-06-01 | 2015-06-01 | A kind of cylindrical type probe for the measurement of magnetic plasma propeller plume |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292007.XA CN104994672B (en) | 2015-06-01 | 2015-06-01 | A kind of cylindrical type probe for the measurement of magnetic plasma propeller plume |
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| CN104994672A true CN104994672A (en) | 2015-10-21 |
| CN104994672B CN104994672B (en) | 2018-04-10 |
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|---|---|---|---|
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| CN107817085A (en) * | 2017-12-07 | 2018-03-20 | 中国科学技术大学 | A kind of paperback probe unit for High Speed Flow Field Plasma parameter diagnosis |
| CN108601189A (en) * | 2018-07-25 | 2018-09-28 | 北京航空航天大学 | cylindrical Langmuir probe, probe assembly and plasma plume flow field detection system |
| CN108696978A (en) * | 2018-07-25 | 2018-10-23 | 北京航空航天大学 | Langmuir probe, Langmuir probe diagnostic system and its diagnostic method |
| CN108919332A (en) * | 2018-05-16 | 2018-11-30 | 中国科学技术大学 | A kind of double flat dress probe unit for super speed vehicle Plasma parameter diagnosis |
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| CN113194591A (en) * | 2021-04-23 | 2021-07-30 | 山东大学 | Langmuir probe, system and method for on-orbit decontamination |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380811A (en) * | 2002-04-19 | 2002-11-20 | 大连理工大学 | Composite probe for plasma diagnosis |
| US20050035770A1 (en) * | 2003-08-12 | 2005-02-17 | Michael Hopkins | Radio frequency langmuir probe |
| CN101056493A (en) * | 2007-05-10 | 2007-10-17 | 东北大学 | Low-temperature plasma diagnosis device |
| CN103140009A (en) * | 2013-01-31 | 2013-06-05 | 北京航空航天大学 | Langmuir multi-probe control circuit used for plasma diagnosis |
| CN103152970A (en) * | 2013-01-31 | 2013-06-12 | 北京航空航天大学 | Cylindrical Langmuir probe for plasma diagnostics |
| CN104244555A (en) * | 2014-09-29 | 2014-12-24 | 北京航空航天大学 | Langmuir emitting probe for plasma space potential diagnosing |
-
2015
- 2015-06-01 CN CN201510292007.XA patent/CN104994672B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380811A (en) * | 2002-04-19 | 2002-11-20 | 大连理工大学 | Composite probe for plasma diagnosis |
| US20050035770A1 (en) * | 2003-08-12 | 2005-02-17 | Michael Hopkins | Radio frequency langmuir probe |
| CN101056493A (en) * | 2007-05-10 | 2007-10-17 | 东北大学 | Low-temperature plasma diagnosis device |
| CN103140009A (en) * | 2013-01-31 | 2013-06-05 | 北京航空航天大学 | Langmuir multi-probe control circuit used for plasma diagnosis |
| CN103152970A (en) * | 2013-01-31 | 2013-06-12 | 北京航空航天大学 | Cylindrical Langmuir probe for plasma diagnostics |
| CN104244555A (en) * | 2014-09-29 | 2014-12-24 | 北京航空航天大学 | Langmuir emitting probe for plasma space potential diagnosing |
Cited By (21)
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| CN107817085A (en) * | 2017-12-07 | 2018-03-20 | 中国科学技术大学 | A kind of paperback probe unit for High Speed Flow Field Plasma parameter diagnosis |
| CN108919332A (en) * | 2018-05-16 | 2018-11-30 | 中国科学技术大学 | A kind of double flat dress probe unit for super speed vehicle Plasma parameter diagnosis |
| CN108601189A (en) * | 2018-07-25 | 2018-09-28 | 北京航空航天大学 | cylindrical Langmuir probe, probe assembly and plasma plume flow field detection system |
| CN108696978A (en) * | 2018-07-25 | 2018-10-23 | 北京航空航天大学 | Langmuir probe, Langmuir probe diagnostic system and its diagnostic method |
| CN109104805A (en) * | 2018-07-25 | 2018-12-28 | 北京航空航天大学 | Langmuir probe, Langmuir probe diagnostic system and its diagnostic method |
| CN108601189B (en) * | 2018-07-25 | 2019-10-11 | 北京航空航天大学 | Cylindrical Langmuir probe, probe assembly and plasma plume flow field detection system |
| CN110006989A (en) * | 2019-04-03 | 2019-07-12 | 陈岩 | A kind of magnetic fault detection system |
| CN110381659A (en) * | 2019-06-04 | 2019-10-25 | 西安电子科技大学 | A kind of radio frequency dynamic capacity coupled plasma diagnostic system and method |
| CN110381659B (en) * | 2019-06-04 | 2021-08-10 | 西安电子科技大学 | Radio frequency dynamic capacitive coupling plasma diagnosis system and method |
| CN110611985B (en) * | 2019-09-25 | 2021-07-16 | 北京航空航天大学 | Device for measuring plume steady-state ion velocity of electric thruster |
| CN110611985A (en) * | 2019-09-25 | 2019-12-24 | 北京航空航天大学 | Device for measuring plume steady-state ion velocity of electric thruster |
| CN111432540A (en) * | 2019-10-31 | 2020-07-17 | 北京航天长征飞行器研究所 | Plug-in type electrostatic probe |
| CN111787678A (en) * | 2020-05-26 | 2020-10-16 | 北京航空航天大学 | Porous measuring device and method for measuring plasma space potential |
| CN111787678B (en) * | 2020-05-26 | 2021-10-29 | 北京航空航天大学 | Porous measuring device and method for measuring plasma space potential |
| CN111935893A (en) * | 2020-07-23 | 2020-11-13 | 中国科学院力学研究所 | Electrostatic probe system with three-electrode structure |
| CN113194591A (en) * | 2021-04-23 | 2021-07-30 | 山东大学 | Langmuir probe, system and method for on-orbit decontamination |
| CN113194591B (en) * | 2021-04-23 | 2022-08-26 | 山东大学 | Langmuir probe, system and method for on-orbit decontamination |
| CN113357111A (en) * | 2021-07-01 | 2021-09-07 | 兰州空间技术物理研究所 | Installation method of probe of ion thruster |
| CN113357111B (en) * | 2021-07-01 | 2022-03-18 | 兰州空间技术物理研究所 | Installation method of probe of ion thruster |
| CN114245554A (en) * | 2021-12-03 | 2022-03-25 | 北京东方计量测试研究所 | Plasma thruster plume parameter multipoint measuring device and measuring method |
| CN114980465A (en) * | 2022-06-10 | 2022-08-30 | 山东大学 | Columnar Langmuir probe and measuring method suitable for low-density plasma |
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