CN101710059A - Microwave coaxial source atomic oxygen ground-based simulation equipment - Google Patents

Microwave coaxial source atomic oxygen ground-based simulation equipment Download PDF

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Publication number
CN101710059A
CN101710059A CN200910235759A CN200910235759A CN101710059A CN 101710059 A CN101710059 A CN 101710059A CN 200910235759 A CN200910235759 A CN 200910235759A CN 200910235759 A CN200910235759 A CN 200910235759A CN 101710059 A CN101710059 A CN 101710059A
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oxygen
atomic oxygen
microwave source
coaxial
simulation equipment
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CN200910235759A
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李中华
郑阔海
赵琳
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510 Research Institute of 5th Academy of CASC
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510 Research Institute of 5th Academy of CASC
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Abstract

The invention relates to coaxial microwave source atomic oxygen ground-based simulation equipment, and belongs to the field of aerospace. The simulation equipment comprises a microwave source, a waveguide and coaxial conversion system, an oxygen supply system, a discharge cavity, a magnet, a neutralized panel, a sample rack, an integrating sphere, a testing room and the like, wherein the microwave source is connected with the waveguide and the coaxial conversion system; the oxygen supply system is connected with the discharge cavity; a waveguide tube transmits microwave energy to the discharge chamber, and the microwave ensures that oxygen is dissociated into high-density oxygen plasma; the oxygen plasma acquires electrons on the neutralized panel, forms an atomic oxygen beam (O), and acts with samples on the sample rack; and in a testing process, the reflectivity of a material is tested by the integrating sphere (8) under a condition that atmosphere is not exposed. The equipment has the characteristics of large flux density of atomic oxygen, and capability of working continuously, measuring sample reflectivity in situ and performing simultaneous testing on multiple samples, can greatly reduce the testing time, and improve the efficiency and reliability of testing.

Description

A kind of microwave coaxial source atomic oxygen ground-based simulation equipment
Technical field
The present invention relates to a kind of coaxial microwave source atomic oxygen ground-based simulation equipment, belong to aerospace field.The coaxial microwave source atomic oxygen ground-based simulation equipment of invention can be used for satellite is carried out the anti-atomic oxygen test in ground with material.
Background technology
Elemental oxygen is the principal ingredient of the remaining atmosphere of Low Earth Orbit; chemical property is very active; can produce the spacecraft surfacing and degrade effect, the machinery, optical property, electric property etc. of material are changed, thereby influence the usability and the life-span of material.It has been an indispensable important content that material carries out anti-atomic oxygen test evaluation before use.So, need development atomic oxygen ground simulated test facility.Existing elemental oxygen device type mainly contains laser dissociation atomic oxygen test equipment and microwave discharge electron cyclotron resonace atomic oxygen test equipment.The main deficiency that exists has:
1) laser dissociation elemental oxygen device structure complexity, poor reliability, can not long time continuous working.
2) though microwave discharge electron cyclotron resonace atomic oxygen test equipment structure is simple relatively, atomic oxygen density is low, be not suitable for carrying out big flux elemental oxygen simulation test.
So, existing elemental oxygen equipment exist complex structure, can not continuous working, number of drawbacks such as flux density is low.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of existing elemental oxygen equipment, provide a kind of structure simple relatively, can continuous working, the flux density height, can in site measurement sample reflectivity ground elemental oxygen analog machine.
The objective of the invention is to be achieved through the following technical solutions.
A kind of coaxial microwave source atomic oxygen ground-based simulation equipment of the present invention, by microwave source, waveguide and coaxial converting system, oxygen system, discharge cavity, magnet, neutralisation system, specimen mounting, integrating sphere, test cabinet.
Its annexation is: microwave source links to each other with waveguide and coaxial converting system, and the microwave energy delivery that waveguide produces microwave source arrives in the arc chamber (4); Oxygen system links to each other with arc chamber, and microwave energy makes oxygen be dissociated into oxygen plasma; After adding the direct current of 100A in the magnet, produce 900 Gausses' high-intensity magnetic field, oxygen plasma is retrained, form the oxygen plasma bundle; The Dc bias that adds negative 10V on the centralized system is with the O in the oxygen plasma +Draw and quicken; Oxygen plasma obtains electronics on the centralization plate, be reduced to oxygen atom (O), forms atomic oxygen beam; Sample effect on elemental oxygen and the specimen mounting; In the process of the test, can with the reflectivity of integrating sphere test material, reach the purpose of the anti-elemental oxygen performance evaluation of material in the condition that does not expose atmosphere.
Its principle of work is: giving birth to frequency by microwave source is that 2.45MHz, power are the adjustable microwave energy of 150～1500W, through waveguide and coaxial converting system, microwave energy is coupled in the discharge cavity; Under the effect in magnetic field, the oxygen molecule in the discharge cavity is dissociated into density and is about 10 12～10 13Cm -3The high density oxygen plasma; The negative bias that adds 10V on the neutralisation plate is quickened the oxonium ion in the plasma state, makes its acquisition oriented energy and repels electronics in the plasma.Oxonium ion after the acceleration incides on the neutralisation plate and therefrom obtains electronics, and the major part that is combined into the oxygen atom reservation projectile energy of neutral oxygen atom reflection forms the neutral atomic oxygen bundle of a certain size oriented energy.By regulating neutralisation plate institute's biasing and changing the oxonium ion incident angle, can regulate the energy of neutral atomic oxygen and the angle after the reflection and distribute.In test cabinet, place one and connect bulb separation, behind sample process action of atomic oxygen, under the condition that keeps vacuum, the reflectivity of testing (R) is carried out in site measurement; Then, can continue sample is carried out atomic oxygen test.
The present invention's advantage compared with prior art is: can carry out long-time atomic oxygen test continuously; During test, atomic oxygen flux density height can shorten test period significantly; 4 installation sites are arranged on the specimen mounting, and 4 samples of packing into simultaneously can improve test efficiency, save experimentation cost; But under the vacuum condition, the reflectivity of in-situ test sample has improved the reliability of test.
Description of drawings
Fig. 1-coaxial microwave source atomic oxygen ground simulated test facility
Among Fig. 1,1-microwave source, 2-waveguide and coaxial converting system, 3-oxygen system, 4-discharge cavity, 5-magnet, 6-neutralisation plate, 7-specimen mounting, 8-integrating sphere, 9-test cabinet.
Embodiment
As shown in Figure 1, a kind of coaxial microwave source atomic oxygen ground-based simulation equipment, by microwave source, waveguide and coaxial converting system, oxygen system, discharge cavity, magnet, the neutralisation plate, specimen mounting, integrating sphere, test cabinet etc. are partly formed.Major function is that material is carried out top elemental oxygen simulation test, the performance of evaluating material in atomic oxygen environment.
Microwave source 1 produces the adjustable microwave energy of 150～1500W, through waveguide and coaxial converting system 2, microwave energy is directly coupled in the discharge cavity 4.Oxygen system is sent to 99.9% pure oxygen in the discharge cavity, and keeps 2 * 10 -1The vacuum tightness of Pa; Oxygen molecule dissociates into the high density oxygen plasma under the effect of microwave energy.Feed about 100 amperes DC current in the magnet 5, produce about 900 Gausses' high-intensity magnetic field in magnet center.Oxygen plasma forms the oxygen plasma bundle under the constraint in magnetic field.Add 10 volts dc negative bias voltage on the centralization plate 6, the oxonium ion in the plasma is drawn, and quicken oxonium ion, make it obtain the oriented energy of 10eV.The oxonium ion that is accelerated strikes on the neutralisation plate, is reduced to the oxygen of atomic state behind the electron gain, and the major part of reservation projectile energy reflects from the neutralisation plate.Forming energy at reflection direction is that 3～8eV, flux density maximum can reach 3 * 10 16Atoms/cm 2S atomic oxygen beam and irradiation carry out action of atomic oxygen to material sample to specimen mounting 7, reach the purpose of evaluating material usability in atomic oxygen environment.
Embodiment
Utilize the present invention, white paint (2 samples), polyimide and three kinds of materials of F46 have been carried out atomic oxygen test simultaneously, the results are shown in Table 1.
The reflectivity in site measurement result of three kinds of materials of table 1
As seen from Table 1, equipment can be used in bigger atomic oxygen flux density (1.06 * 10 16Atoms/cm 2S) carry out material test; 4 samples of can packing into simultaneously, greatly
Figure G2009102357597D00041
Improved test efficiency; In the process of the test, can be under vacuum condition, the reflectivity of in-situ test material has improved the reliability of test.

Claims (5)

1. a coaxial microwave source atomic oxygen ground-based simulation equipment is characterized in that: comprise microwave source (1), waveguide and coaxial converting system (2), oxygen system (3), discharge cavity (4), magnet (5), neutralisation plate (6), specimen mounting (7), integrating sphere (8), test cabinet (9); Wherein microwave source links to each other with waveguide and coaxial converting system, in waveguide and coaxial converting system (2) the power transfer discharge cavity with microwave source (1) generation; Oxygen system links to each other with arc chamber, and the oxygen molecule in the discharge cavity (4) is dissociated into the high density oxygen plasma; Negative bias on neutralisation plate (5) is quickened, and obtains electronics, forms the atomic oxygen beam with 3～8eV, and irradiation is to the sample of specimen mounting (6).
2. a kind of coaxial microwave source atomic oxygen ground-based simulation equipment according to claim 1 is characterized in that: the atomic oxygen beam energy of generation is 3～8eV.
3. a kind of coaxial microwave source atomic oxygen ground-based simulation equipment according to claim 1 is characterized in that: the oxygen plasma volume density that discharge cavity produces reaches 10 12～10 13Cm -3, after neutralisation, atomic oxygen flux density maximum reaches 3 * 10 16Atoms/cm 2S.
4. a kind of coaxial microwave source atomic oxygen ground-based simulation equipment according to claim 1 is characterized in that: placed integrating sphere in test cabinet (9), be used under vacuum condition, the reflectivity of sample is carried out in site measurement.
5. a kind of coaxial microwave source atomic oxygen ground-based simulation equipment according to claim 1 is characterized in that: 4 sample installation sites are arranged on the described specimen mounting (7), can carry out action of atomic oxygen to 4 samples simultaneously.
CN200910235759A 2009-10-13 2009-10-13 Microwave coaxial source atomic oxygen ground-based simulation equipment Pending CN101710059A (en)

Priority Applications (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102175665A (en) * 2011-02-11 2011-09-07 哈尔滨工业大学 Experiment device for simulating atomic oxygen oxidation ground of super-high temperature heat-protection material
CN102967688A (en) * 2012-11-12 2013-03-13 中国航天科技集团公司第五研究院第五一〇研究所 Method for analyzing failure of electric conductive black polyimide film in spatial environment
CN103344777A (en) * 2013-06-20 2013-10-09 哈尔滨工业大学 High-temperature and low-pressure oxygen dissociation environment test device for heat protection material
CN104363691A (en) * 2014-10-24 2015-02-18 兰州空间技术物理研究所 Parameter-adjustable microwave plasma generation device
CN104375161B (en) * 2014-11-05 2017-02-15 北京卫星环境工程研究所 atomic oxygen beam energy testing system
CN110487708A (en) * 2019-08-28 2019-11-22 哈尔滨工业大学 A kind of laser induced elemental oxygen device and method of far ultraviolet

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102175665A (en) * 2011-02-11 2011-09-07 哈尔滨工业大学 Experiment device for simulating atomic oxygen oxidation ground of super-high temperature heat-protection material
CN102175665B (en) * 2011-02-11 2013-01-16 哈尔滨工业大学 Experiment device for simulating atomic oxygen oxidation ground of super-high temperature heat-protection material
CN102967688A (en) * 2012-11-12 2013-03-13 中国航天科技集团公司第五研究院第五一〇研究所 Method for analyzing failure of electric conductive black polyimide film in spatial environment
CN103344777A (en) * 2013-06-20 2013-10-09 哈尔滨工业大学 High-temperature and low-pressure oxygen dissociation environment test device for heat protection material
CN104363691A (en) * 2014-10-24 2015-02-18 兰州空间技术物理研究所 Parameter-adjustable microwave plasma generation device
CN104375161B (en) * 2014-11-05 2017-02-15 北京卫星环境工程研究所 atomic oxygen beam energy testing system
CN110487708A (en) * 2019-08-28 2019-11-22 哈尔滨工业大学 A kind of laser induced elemental oxygen device and method of far ultraviolet

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Open date: 20100519