CN102931948B - The high-pressure subnanosecond impulse source that a kind of fast switch is integrated with Blumlein line - Google Patents
The high-pressure subnanosecond impulse source that a kind of fast switch is integrated with Blumlein line Download PDFInfo
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- CN102931948B CN102931948B CN201210288546.2A CN201210288546A CN102931948B CN 102931948 B CN102931948 B CN 102931948B CN 201210288546 A CN201210288546 A CN 201210288546A CN 102931948 B CN102931948 B CN 102931948B
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Abstract
The present invention relates to the high-pressure subnanosecond impulse source that a kind of fast switch is integrated with Blumlein line, belong to technical field of pulse power.This clock comprises main pulse switch, Blumlein line, fast switch, transmission line and matched load; Described fast switch 5 is positioned at Blumlein line partial interior; The transmission line other end is connected with matched load 6; The insulating barrier 4 of Blumlein line inner core, its direction, inside and outside footpath all adopts radial seal structure, to produce gas, liquid isolation.Fast switch 5 is moved to the output of Blumlein line part by the present invention by clock transmission line inside, decrease the quantity of clock built-in electrical insulation parts, structure is compacter; Fast switch 5 air pressure inside is suitable with main pulse switch 1 air pressure inside simultaneously, can reduce the stress on main pulse switch insulation dividing plate 2, insulating barrier 4, improve the reliability of clock when clock internal pressure balances; The shape that final pulse source exports pulse obtains change, matched load obtains approximate rectangular high-pressure subnanosecond impulse and exports.
Description
Art
The present invention relates to the high-pressure subnanosecond impulse source that a kind of fast switch is integrated with Blumlein line, achieve the change of the compact of high-pressure subnanosecond impulse source structure and output pulse shape, matched load obtains approximate rectangular high power subnanosecond pulse export, belong to technical field of pulse power.
Background technology
The sixties in 20th century, the J.C.Martin of Britain is used in the pairs of transmission line technology of A.D.Blumlein on radar pulse modulator in Pulse Power Techniques, successfully develop First High Pressure nanosecond pulse source in the world, start new era of Pulse Power Techniques.People call Blumlein line this pairs of transmission line, and its advantage is that output voltage equals charging voltage under the complete matching condition of impedance compared with single transmission line, and the energy that load obtains is doubled, therefore also known as multiplication of voltage transmission line.
Coaxial Blumlein line is widely used in high-pressure subnanosecond impulse source, is mainly used in the formation of pulse.Consult Fig. 1, existing Blumlein type high-pressure subnanosecond impulse source, comprise main pulse switch, Blumlein line, fast switch, transmission line and matched load.Described Blumlein line part is bitubular line structure; Main pulse switch 1 structure is self breakdown formula gases at high pressure multichannel arrester switch, and the ON time of switch is at nanosecond order, and between the urceolus and middle cylinder of Blumlein line one end, the outside that can realize switch gap regulates, thus controls the amplitude of main pulse; The inner core of Blumlein line is connected with transmission line by transition structure, forms self breakdown formula gases at high pressure arrester switch between the inner wire of transmission line one end, i.e. fast switch 5; The other end of transmission line is connected with matched load 6; The high power subnanosecond pulse that matched load 6 produces for absorbing clock.Fast switch 5 is Subnanosecond Gas Switchs, be characterized in that short air gap, hyperbar, fast-pulse input, realize self breakdown under 200% ~ 300% overvoltage, when puncturing, gas gap electric field can up to a few MV/cm, therefore switch is closed quickly, the rise time exporting pulse reaches hundreds of ps even tens ps, can realize the shaping to nanosecond pulse: trembling of forward position or rear along blocking, forms high-pressure subnanosecond impulse.Main pulse insulating barrier 2 is for the support of cylinder in Blumlein line part and insulation; Insulating barrier 4 supports and insulation for the inside and outside cylinder of Blumlein line part; All there is fast switch dividing plate at the two ends of fast switch 5; Described two fast switch dividing plate and main pulse insulating barriers 2, are divided into air cavity, sap cavity, air cavity three part successively by high-pressure subnanosecond impulse source inner chamber.Therefore, the direction, inside and outside footpath of described two fast switch dividing plates and main pulse insulating barrier 2 all adopts radial seal structure, to produce gas, liquid isolation.
As mentioned above, for existing Blumlein type high-pressure subnanosecond impulse source, its shortcoming existed is: (1) Blumlein line and fast switch 5 need to be connected by one section of transition structure between the two, and the volume of clock is increased; (2) main pulse switch insulation dividing plate 2 needs to bear a few Mpa gas pressure, requires that main pulse switch insulation dividing plate 2 has good insulation property and mechanical performance; (3) Blumlein line exports the shape of pulse and main pulse switch 1 has much relations, in order to obtain close to desirable rectangular pulse to main pulse switch 1 requirement being: the switch rise time is short, inductance is little, but the shape that the structure of existing main pulse switch 1 itself determines clock output waveform is class Gaussian pulse, its application is restricted.
Summary of the invention
For solving the problem that existing Blumlein type high-pressure subnanosecond impulse source volume is large, shape that is that export pulse is class Gaussian pulse, the present invention proposes the high-pressure subnanosecond impulse source that a kind of fast switch is integrated with Blumlein line.
Technical scheme of the present invention is: the high-pressure subnanosecond impulse source that a kind of fast switch is integrated with Blumlein line, comprises main pulse switch, Blumlein line, fast switch, transmission line and matched load; Described Blumlein line part is bitubular line structure, and main pulse switch 1 structure is self breakdown formula gases at high pressure multichannel arrester switch, between the urceolus and middle cylinder of Blumlein line one end; The inner core output of Blumlein line and inner wire one end of transmission line form self breakdown formula gases at high pressure arrester switch, i.e. fast switch 5; Described fast switch 5 is positioned at Blumlein line partial interior; The other end of transmission line is connected with matched load 6; Main pulse insulating barrier 2 is for the support of cylinder in Blumlein line part and insulation; The insulating barrier 4 of Blumlein line inner core and the supports insulative plate of transmission line inner wire end are as fast switch dividing plate; High-pressure subnanosecond impulse source inner chamber is divided into air cavity, sap cavity, air cavity three part by described supports insulative plate and main pulse insulating barrier 2, insulating barrier 4 successively.Therefore, the direction, inside and outside footpath of described supports insulative plate and main pulse insulating barrier 2, insulating barrier 4 all adopts radial seal structure, to produce gas, liquid isolation.
The invention has the beneficial effects as follows: on the basis of traditional B lumlein type high-pressure subnanosecond impulse source, fast switch 5 is moved to the output of Blumlein line part by clock transmission line inside, reduce the volume of clock, structure becomes compacter; Fast switch 5 air pressure inside is suitable with main pulse switch 1 air pressure inside simultaneously, can reduce the pressure deformation of main pulse switch insulation dividing plate 2, insulating barrier 4, improve the reliability of clock when clock internal pressure balances; The shape that final pulse source exports pulse obtains change, matched load obtains approximate rectangular high power subnanosecond pulse and exports.
Accompanying drawing explanation
Fig. 1 is traditional B lumlein type high-pressure subnanosecond impulse source structural representation in prior art
Fig. 2 is fast switch that the present invention the proposes high-pressure subnanosecond impulse source structural representation integrated with Blumlein line
Fig. 3 is traditional B lumlein type high-pressure subnanosecond impulse source main pulse oscillogram
Fig. 4 is the high-pressure subnanosecond impulse source main pulse oscillogram that in embodiment, fast switch is integrated with Blumlein line
Fig. 5 is the high-pressure subnanosecond impulse source output waveform figure that in embodiment, fast switch is integrated with Blumlein line
In figure: 1-main pulse switch, 2-main pulse switch insulation dividing plate, 4-insulating barrier, the fast switch of 5-, 6-matched load.
Embodiment
Below the present invention is described further.
Consult Fig. 2, the high-pressure subnanosecond impulse source that the fast switch in the present embodiment is integrated with Blumlein line, comprise main pulse switch, Blumlein line, fast switch, transmission line and matched load; Described Blumlein line part is bitubular line structure, and main pulse switch 1 structure is self breakdown formula gases at high pressure multichannel arrester switch, between the urceolus and middle cylinder of Blumlein line one end; The inner core output of Blumlein line and inner wire one end of transmission line form self breakdown formula gases at high pressure arrester switch, i.e. fast switch 5; Described fast switch 5 is positioned at Blumlein line partial interior; The transmission line other end is connected with matched load 6; Main pulse insulating barrier 2 is for the support of cylinder in Blumlein line part and insulation; The insulating barrier 4 of Blumlein line inner core and the supports insulative plate of transmission line inner wire end are as fast switch dividing plate; High-pressure subnanosecond impulse source inner chamber is divided into air cavity, sap cavity, air cavity three part by described supports insulative plate and main pulse insulating barrier 2, insulating barrier 4 successively.Therefore, the direction, inside and outside footpath of described supports insulative plate and main pulse insulating barrier 2, insulating barrier 4 all adopts radial seal structure, to produce gas, liquid isolation.
In the present embodiment, main pulse switch 1 is self breakdown formula gases at high pressure multichannel arrester switch, and a few Mpa high pure nitrogen is filled in inside; Fast switch 5 is Peaking type Subnanosecond Gas Switch, and inside is also filled with Mpa magnitude high pure nitrogen.Blumlein line part-structure is of a size of: inner core outer radius 32.5mm, middle cylinder inside radius 62.5mm, middle cylinder outer radius 75.0mm, urceolus inside radius 125.0mm, length 440mm, and inside is filled with transformer oil insulation.Utilize the insulating barrier of insulating barrier 4 as fast switch 5 one end of traditional B lumlein type high-pressure subnanosecond impulse source Blumlein line part inner core,, external diameter direction adopts the mode of radial seal within it, achieve the isolation to the sealing of fast switch internal gases at high pressure and clock interior oil, gas, decrease the quantity of clock built-in electrical insulation parts, the volume of clock reduces, and structure is compacter.The internal pressure of the switch of main pulse simultaneously 1 is suitable with the internal pressure of fast switch 5, when clock internal pressure reaches balance, stress on main pulse switch insulation dividing plate 2, insulating barrier 4 can effectively reduce compared with original structure, improves the reliability of clock.
When Blumlein line part charges to the operating voltage 300kV of main pulse switch 1, there is self breakdown in main pulse switch 1, namely in Blumlein line part, short circuit between urceolus, Blumlein line part produces wave process, form the high-voltage nanosecond pulse that a pulse duration is 6ns, trembling through too fast switch 5 forms that amplitude is about 300kV, forward position subnanosecond, pulsewidth are about the approximate rectangular pulse of 6ns and export, and is called high-pressure subnanosecond impulse or high power subnanosecond pulse traditionally.Compare existing Blumlein type high-pressure subnanosecond impulse source, the structure of the high-pressure subnanosecond impulse source that the fast switch that the present invention proposes is integrated with Blumlein line is compacter, the equivalent inductance in pulse shaping loop reduces, matched load 6 can obtain approximate rectangular pulse export, can be used as a kind of desirable pulsed drive source.Fig. 3 gives traditional B lumlein type high-pressure subnanosecond impulse source main pulse waveform, Fig. 4 gives the high-pressure subnanosecond impulse source main pulse waveform that in the present embodiment, fast switch is integrated with Blumlein line, and Fig. 5 gives the impulse waveform example of approximate rectangular output corresponding in the present embodiment.As can be seen from Fig. 3, Fig. 4, Fig. 5, the high-pressure subnanosecond impulse source that the fast switch that the present invention proposes is integrated with Blumlein line, compared to traditional B lumlein type high-pressure subnanosecond impulse source, its pulse shape exported is approximately rectangle, and forward position reaches sub-ns magnitude.
Claims (1)
1. the high-pressure subnanosecond impulse source that fast switch is integrated with Blumlein line, comprises main pulse switch, Blumlein line, fast switch, transmission line and matched load; Described Blumlein line is bitubular line structure, and main pulse switch (1) structure is self breakdown formula gases at high pressure multichannel arrester switch, between the urceolus and middle cylinder of Blumlein line one end; The output of Blumlein line inner core and one end of transmission line inner wire form self breakdown formula gases at high pressure arrester switch, i.e. fast switch (5); It is inner that described fast switch (5) is positioned at Blumlein line; The transmission line other end is connected with matched load (6); Main pulse insulating barrier (2) is for the support of cylinder in Blumlein line and insulation; The insulating barrier (4) of Blumlein line inner core and the supports insulative plate of transmission line inner wire end are as fast switch dividing plate; The direction, inside and outside footpath of described supports insulative plate and main pulse insulating barrier (2), insulating barrier (4) all adopts radial seal structure.
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| CN201210288546.2A CN102931948B (en) | 2012-08-15 | 2012-08-15 | The high-pressure subnanosecond impulse source that a kind of fast switch is integrated with Blumlein line |
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Cited By (1)
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| CN104065296A (en) * | 2014-07-11 | 2014-09-24 | 中国工程物理研究院流体物理研究所 | 300-kilovolt nanosecond pulser |
| CN105071787B (en) * | 2015-08-05 | 2018-02-06 | 西北核技术研究所 | A kind of pulse-forming line with reentry structure |
| CN105763095B (en) * | 2016-02-02 | 2018-06-22 | 北京京安刑技警用装备有限公司 | A kind of transient field field strength and power multiplication device |
| CN106299580B (en) * | 2016-10-17 | 2018-10-09 | 西安电子工程研究所 | A kind of wide range high power microwave radiation system based on plate Blumlein transmission lines |
| CN111464068A (en) * | 2020-04-30 | 2020-07-28 | 清华大学 | Nanosecond pulse power supply |
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