CN103760475B - A kind of high-power microwave vacuum sparking test research device - Google Patents
A kind of high-power microwave vacuum sparking test research device Download PDFInfo
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- CN103760475B CN103760475B CN201310719615.5A CN201310719615A CN103760475B CN 103760475 B CN103760475 B CN 103760475B CN 201310719615 A CN201310719615 A CN 201310719615A CN 103760475 B CN103760475 B CN 103760475B
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Abstract
The invention discloses a kind of high-power microwave vacuum sparking test research device, include straight wave guide, it is separately installed with ceramic window at the two ends of straight wave guide, it is connected to extract system and gas charging system in the outside of straight wave guide, described extract system is provided with vacuum gauge, be provided with sparking observation window in the side of straight wave guide, described sparking observation window is connected with optical-electrical converter by light guide cable, and described optical-electrical converter is connected with computer；The present invention by filling, extract system controls Vacuum waveguide internal gas pressure neatly and obtains the various vacuum environments that we need；Tested by the High-Power Microwave under different vacuum degree condition, monitor sparking situation, it is thus achieved that vacuum breakdown condition and high power under different capacity grade bear the time；The impact that High-Power Microwave under vacuum condition is punctured by gas with various can be tested simultaneously；Device is by can be with system, obtain in High Power Microwave System the various triggering factors of sparking under vacuum environment all sidedly.
Description
Technical field
The present invention relates to high-power microwave vacuum sparking studying technological domain, particularly relate to a kind of high-power microwave vacuum sparking test research device.
Background technology
On current tokamak device both domestic and external, commonly used HIGH-POWERED MICROWAVES carries out plasma heating and electric current drives.On China's Fully Superconducting Tokamak EAST device, High-Power Microwave (MW magnitude, single tube is more than 200 kW) is also utilized to drive plasma.On transmission line, air is isolated by ceramic window with the vacuum of device；Antenna array is connected with EAST vacuum installation by a big vacuum chamber again.Although lower hybrid wave vacuum chamber has independent extract system, wave guide wall also leaves aspirating hole, but due to antenna give vent to anger, vacuum environment in the reason waveguide such as flow resistance is bigger the most more complicated, cause and frequently strike sparks when HIGH-POWERED MICROWAVES is tested.To send protection signal cut microwave source in the waveguide of system Zhong Ge road during sparking immediately, hardware speed determines that the sparking persistent period is in us magnitude；If protecting the most immediately, sparking will be continued for, and threaten the safety of ceramic window.System finds once the most persistently to light after Protection of arcing 222ms in an experiment.Being eventually found the reason persistently struck sparks is owing to microwave source PIN protection switch the most thoroughly turns off output, causes pass klystron of having no progeny still to have output about 3KW, and after high power punctures, 3 KW just can keep sustained breakdown state.Although ceramic window is not caused mortal injury by small-power burning, but the plasma coating effect of burning generation can reduce the life-span of ceramic window.By this event, we start to explore the factor causing high power to strike sparks.
In waveguide, the reason of sparking has exceeded the breakdown field strength of its medium mainly due to waveguide internal electric intensity.Waveguide arcing tends to occur at field intensity strength in feeder line, and moves to power source direction along the broadside of feeder line.Electric field intensity in waveguide increases with the increase of power.Under the conditions of matched load, power constant, electric field intensity also keeps constant；At standing wave state, same power, along with the increase of standing wave, field intensity also can raise.So under standing-wave condition, the power capacity of waveguide will reduce.Under the conditions of high power long pulse, sparking reason is more complicated.The test in terms of long pulse microwave high power vacuum sparking can be directly carried out currently without a ready-made device.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of high-power microwave vacuum sparking test research device.
The present invention is achieved by the following technical solutions:
A kind of high-power microwave vacuum sparking test research device, include straight wave guide, it is separately installed with ceramic window at the two ends of straight wave guide, it is connected to extract system and gas charging system in the side of straight wave guide, described extract system is provided with vacuum gauge, be additionally provided with sparking observation window in the side of straight wave guide, described sparking observation window is connected with optical-electrical converter by light guide cable, and described optical-electrical converter is connected with computer acquisition card；Obtain Vacuum waveguide environment by ceramic window, obtain the vacuum required for experiment by extract system, when vacuum is too high, by gas charging system, inflatable body in straight wave guide is reduced vacuum；Tested by the High-Power Microwave under different vacuum degree condition, monitoring sparking situation, by light guide cable, optical signal being passed to optical-electrical converter, optical-electrical converter converts optical signals to the signal of telecommunication and passes to computer, can obtain the vacuum breakdown condition under different capacity grade and high power bears the time；When studying the high-power microwave vacuum sparking situation of gas with various, inflation source can be changed after pumping high vacuum, fill front first pumping high vacuum and vacuum straight wave guide is toasted for a long time.
The invention have the advantage that the present invention be high-power microwave vacuum sparking test provide a reliably and flexibly experimental provision, by filling, extract system control neatly Vacuum waveguide internal gas pressure obtain we need various vacuum environments；Tested by the logical ripple under different vacuum degree condition, monitor sparking situation, it is thus achieved that vacuum breakdown condition and high power under different capacity grade bear the time；The impact that High-Power Microwave under vacuum condition is punctured by gas with various can be tested simultaneously；Device is by can be with system, obtain in High Power Microwave System the various triggering factors of sparking under vacuum environment all sidedly.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1, a kind of high-power microwave vacuum sparking test research device, include straight wave guide 2, it is separately installed with ceramic window 1 at the two ends of straight wave guide 2, it is connected to extract system 4 and gas charging system 5 in the side of straight wave guide 2, described extract system 4 is provided with vacuum gauge 3, be additionally provided with sparking observation window 6 in the side of straight wave guide 2, described sparking observation window 6 is connected with optical-electrical converter 8 by light guide cable 7, and described optical-electrical converter 8 is connected with the capture card of computer 9；Vacuum waveguide environment is obtained by ceramic window 1, the vacuum required for experiment is obtained by extract system 4, when vacuum is too high, by gas charging system 5, inflatable body in straight wave guide 2 is reduced vacuum, tested by the logical ripple under different vacuum degree condition, monitor sparking situation, by light guide cable 7, optical signal passed to optical-electrical converter 8, optical-electrical converter 8 converts optical signals to the signal of telecommunication and passes to computer 9, it is thus achieved that vacuum breakdown condition and high power under different capacity grade bear the time.The impact that High-Power Microwave under vacuum condition is punctured by gas with various can be tested simultaneously；Device is by can be with system, obtain in High Power Microwave System the various trigger mechanisms of sparking under vacuum environment all sidedly.When studying the high-power microwave vacuum sparking situation of gas with various, inflation source can be changed after pumping high vacuum, fill front first pumping high vacuum and vacuum straight wave guide is toasted for a long time.
Claims (1)
1. a high-power microwave vacuum sparking test research device, it is characterised in that: include straight wave guide, be separately installed with ceramic window at the two ends of straight wave guide；It is connected to extract system and gas charging system in the side of straight wave guide, described extract system is provided with vacuum gauge；It is additionally provided with sparking observation window in the side of straight wave guide, described sparking observation window is connected with optical-electrical converter by light guide cable, described optical-electrical converter is connected with computer acquisition card, whole research device obtains Vacuum waveguide environment by ceramic window, the vacuum required for experiment is obtained by extract system, when vacuum is too high, by gas charging system, inflatable body in straight wave guide is reduced vacuum；Tested by the High-Power Microwave under different vacuum degree condition, monitoring sparking situation, by light guide cable, optical signal being passed to optical-electrical converter, optical-electrical converter converts optical signals to the signal of telecommunication and passes to computer, it is thus achieved that vacuum breakdown condition and high power under different capacity grade bear the time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310719615.5A CN103760475B (en) | 2013-12-23 | 2013-12-23 | A kind of high-power microwave vacuum sparking test research device |
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| CN201310719615.5A CN103760475B (en) | 2013-12-23 | 2013-12-23 | A kind of high-power microwave vacuum sparking test research device |
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| CN103760475A CN103760475A (en) | 2014-04-30 |
| CN103760475B true CN103760475B (en) | 2016-09-28 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103945625B (en) * | 2014-05-12 | 2016-05-11 | 哈尔滨工业大学 | H in circular waveguide01The heater of pattern electromagnetic wave plasma |
| CN112105136B (en) * | 2020-10-22 | 2021-07-27 | 四川大学 | Ignition method of microwave plasma torch |
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Patent Citations (7)
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| US6285538B1 (en) * | 1996-02-20 | 2001-09-04 | General Electric Company | Partial discharge coupler |
| CN1812688A (en) * | 2006-01-05 | 2006-08-02 | 李衎 | Plasma generator |
| CN1945650A (en) * | 2006-10-18 | 2007-04-11 | 中国科学院等离子体物理研究所 | Microwave break down protecting method in wave guide |
| CN200982992Y (en) * | 2006-10-18 | 2007-11-28 | 中国科学院等离子体物理研究所 | Remote distance wave guide arc light detector |
| CN201301341Y (en) * | 2008-11-04 | 2009-09-02 | 乐培界 | Microwave-plasma experimental facility |
| CN202332716U (en) * | 2011-07-29 | 2012-07-11 | 河北工业大学 | Vacuum measurement device internally provided with cold cathode tube for vacuum arc extinguish chamber |
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| CN103760475A (en) | 2014-04-30 |
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