CN102879285A - Device for realizing strong magnetic pressure oblique wave loading in solid materials - Google Patents
Device for realizing strong magnetic pressure oblique wave loading in solid materials Download PDFInfo
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- CN102879285A CN102879285A CN2012104036978A CN201210403697A CN102879285A CN 102879285 A CN102879285 A CN 102879285A CN 2012104036978 A CN2012104036978 A CN 2012104036978A CN 201210403697 A CN201210403697 A CN 201210403697A CN 102879285 A CN102879285 A CN 102879285A
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Abstract
The invention discloses a device for realizing strong magnetic pressure oblique wave loading in solid materials. The device comprises a parallel transmission line upper electrode plate, an insulating film and a parallel transmission line lower electrode plate which are superposed to form a plate body from top to bottom, a plurality of primary switch bodies, a plurality of secondary switch bodies, a peaking capacitor and a load cavity are arranged on the plate body, the primary switch bodies, the secondary switch bodies and the peaking capacitor penetrate through the plate body, and the primary switch bodies are connected with a high-voltage power source and a high-voltage pulse trigger simultaneously. On a target sample electrode, large pulse current and a self-induced magnetic field interacts with each other to generate large Lorentz force, namely, magnetic pressure which is acted on loading surfaces of an upper electrode and a lower electrode of a sample, the magnetic pressure then is transmitted onto solid samples in an upper electrode chamber hole and a lower electrode chamber hole from inside to outside along the thickness direction, and the solid samples obtain the approximately uniformly distributed magnetic pressure oblique waves with rise time of 470ns-600ns and the loading amplitude of 1GPa-100GPa, so that quasi-isentropic compression of the materials is achieved.
Description
Technical field
The present invention relates to a kind of strong magnetic pressure oblique wave charger in dynamic high-pressure science and technology, Pulse Power Techniques field, specifically refer to a kind of device that strong magnetic pressure oblique wave loads of in solid material, realizing.
Background technology
Dynamic behavior and the complicated phenomenon thereof of material are the important research directions of the subjects such as dynamic high-pressure science and technology, Condensed Matter Physics, shock dynamics under the research extreme condition.For a long time, its main charger and technology have explosive detonation driving, firsts and seconds Gas Gun, electric blasting and Laser Driven etc.What these chargers and technology realized mainly is that a kind of impact compress loads, in the solid material sample, produce the shock wave of a strong discontinuity surface, sample after the compression is in a high temperature, high pressure conditions, the characteristics of this loading are that on-load pressure is from several GPa to number TPa, the temperature rise of the above sample of hundred lucky handkerchief pressure is opened to tens thousand of by thousand and is opened, even higher, sample is easy to be in molten state.
For other zone of research material phase space state (high pressure, low temperature, for the Hugoniot state of impact compress, be referred to as to depart from the Hugoniot state) characteristic, over past ten years, a kind of novel compression method is suggested, and namely accurate isentropic compression loads.Current, can realize that the accurate isentropic compression loading technique of solid material has magnetic to drive accurate isentropic compression, the accurate isentropic compression of Laser Driven, density gradient ram technology, the detonation product expansion accurate isentropic compression of unloading and ramp generator etc.At present, the Development Technology of main flow mainly is that first three kind is that magnetic drives accurate isentropic compression, the accurate isentropic compression of Laser Driven and density gradient ram technology.The three respectively has characteristics, the accurate isentropic compression of Laser Driven is to utilize the laser air reservoir film of directly ablating to produce high pressure plasma act on the target sample after vacuum gap expands, or laser converges at, and gold blackbody radial chamber generation x ray acts on the target sample after the even cunning of cavity or the air reservoir film of ablating again produces high pressure plasma through vacuum gap expansion and sample, the rise time of this on-load pressure ripple is shorter, is generally 10-30ns.Density gradient ram technology mainly is based on a high speed density gradient ram bump of two-stage light gas gun emission target, in target, produce a rise time and be the on-load pressure ripple about 1ms, reason owing to impedance matching, this pressure wave has the shock wave of individual Initial Jump usually, and this initial shock wave can produce an initial temperature rise in the target sample.And magnetic to drive accurate isentropic compression be that the time dependent pulse high current that relies on experimental provision to produce the interact magnetic pressure (Lorentz force) of generation of load electrode and the induced field of self of opposite direction of flowing through acts on the loading electrode surface, propagate along its thickness direction, act in the material sample.This magnetic pressure rise time is 300ns～800ns, and temporal evolution smoothly rises, and is a kind of comparatively desirable accurate isentropic compression approach.
Be engaged in the world the country that magnetic drives accurate isentropic compression experimental provision and method research and mainly contain a few countries such as the U.S., France and Britain, domestic only have Fluid Physics Inst., China Engineering Physics Academy being engaged in relevant apparatus and method research.Representational device mainly is divided three classes, and a class is that U.S. Los Alamos laboratory and Russian institute in kind are the plate blast magnetic compression strong current generator of representative; Another kind of be the Z/ZR in inferior laboratory, the U.S. Holy Land and China Physics Institute's fluid physics research institute at the large-scale plants such as PTS of building, realize first that wherein magnetic drives the accurate isentropic compression in plane and finishes at the Z device; The 3rd class is the pulse power device based on the energy storage of capacitor group, parallel-plate transmission and solid film insulation of so far inferior laboratory, French CE G weapon research centre, the U.S. Holy Land, Washington State University and the development of China Physics Institute's fluid physics research institute of calendar year 2001, is building such as VELOCE, Asia, the GENESIS(Holy Land), GEPI, CEPAGE, CQ-1.5 and CQ-4 etc.
Summary of the invention
The object of the present invention is to provide a kind of device that strong magnetic pressure oblique wave loads of in solid material, realizing, a kind of large electric current experimental provision that utilizes Pulse Power Techniques to develop, the oblique wave of realizing the solid material sample loads (accurate isentropic compression), the dynamic behavior of research material.
Purpose of the present invention is achieved through the following technical solutions:
A kind of device of in solid material, realizing strong magnetic pressure oblique wave loading, comprising superposes from top to bottom successively forms ribbon feeder electric pole plate, insulation film and the ribbon feeder lower electrode plate of plate body, be provided with a plurality of primary switch bodies that are connected with plate body, a plurality of secondary switch body and sharpening capacitor device and a load cavity at described plate body, described a plurality of primary switch bodies are connected with the high-voltage pulse trigger with the high-voltage power source simultaneously.Utilize the high-voltage power source to give a plurality of primary switch bulk chargings to predeterminated voltage 60kV～90kV, then under the effect of high-voltage pulse trigger voltage pulse output, primary switch body generation field distortion conducting discharge, energy moment of primary switch body discharges in the time scale of several microseconds, ribbon feeder electric pole plate and ribbon feeder lower electrode plate through symmetrical structure are transferred to the load cavity, and the discharge waveform adjusting is carried out through sharpening capacitor device and secondary switch body in the centre; On the target sample electrode, this pulse high current and self-induced magnetic field interaction, produce a large Lorentz force, it is magnetic pressure, act on the loading surface of the upper and lower electrode of sample, through-thickness is on the inner solid sample that outwards is transmitted in the upper and lower electrode thorax of the sample hole, solid sample obtains the approximate uniform rise time 470ns～600ns that distributes, loads the magnetic pressure oblique wave of amplitude 1GPa～100GPa, realizes the accurate isentropic compression of material.
Described primary switch body comprises energy-storage pulsed capacitor, the top of energy-storage pulsed capacitor has capacitor lead-out electrode, switch body is installed above energy-storage pulsed capacitor, switch body has the high-field electrode that is connected with capacitor lead-out electrode and the output ground electrode that is spaced apart with high-field electrode, between described high-field electrode and output ground electrode, be provided with trigger electrode, the output ground electrode is connected with the ribbon feeder electric pole plate, and trigger electrode is connected with the high-voltage pulse trigger.Specifically, switch body is as the switching part of conducting and off-state, and energy-storage pulsed capacitor is as the storer of electric energy, the conducting of switch body is so that the electric energy abrupt release of energy-storage pulsed capacitor forms large electric current, specifically, the output ground electrode is connected with the ribbon feeder electric pole plate by transition disc, the ribbon feeder electric pole plate is connected to far-end, and the ribbon feeder lower electrode plate is connected with the earth, so the output ground electrode is in earth potential before the switch discharge; The container extraction electrode of drawing is arranged on the energy-storage pulsed capacitor, high-field electrode is by being connected with the container extraction electrode, the high-pressure side of the container extraction electrode of maintenance high-field electrode and energy-storage pulsed capacitor is idiostatic, trigger electrode is between high-field electrode and output ground electrode, when energy-storage pulsed capacitor is filled reverse voltage U0, the current potential of discharge switch high-field electrode also is U0, trigger electrode is positioned at 1/3 position of high-field electrode and output ground electrode, in energy-storage pulsed capacitor charging time, is to 1/3 current potential of trigger electrode, therefore the current potential of trigger electrode is U0/3, when high-voltage pulse generator is given a positive pulse voltage U, after the triggering of the external series gap between high-voltage pulse trigger and trigger electrode puncture, trigger electrode open circuit forms total reflection and obtains-pulse of 4U0/3, therefore the voltage between high-field electrode and the trigger electrode can become 7U0/3, trigger electrode and the voltage of output between the ground electrode can become 4 U0/3, and the electric field between two electrodes is distorted simultaneously, makes the rapid conducting discharge of switch.
Described switch body comprises insulator, insulator is fixed on the output ground electrode, middle part at insulator is provided with cable hole, the cable hole below is fixed with the high-field electrode fixed bar, high-field electrode is sleeved on the high-field electrode fixed bar and with capacitor lead-out electrode and is connected, high-field electrode is in the same level height with the output ground electrode, and described trigger electrode is fixed on the insulator bottom, and its end is between high-field electrode and output ground electrode.Further specifically, switch body has a plurality of parts, be fixed on after the connection on the ribbon feeder electric pole plate, main element wherein is insulator, normally adopt nylon material to make, its integral body is cylindrical, be provided with in the middle cable hole, be used for and the connection of being connected, be fixed with the high-field electrode fixed bar in the bottom of cable hole, the high-field electrode fixed bar extends insulator downwards, be set with high-field electrode at its end, high-field electrode is connected with the container extraction electrode, also is installed with the trigger electrode of ring-type on the high-field electrode fixed bar, trigger electrode, high-field electrode, and the output ground electrode is in the same level height, take the high-field electrode fixed bar as axis, high-field electrode, trigger electrode, the output ground electrode is according to the coaxial installation of diameter order from small to large, and the certain distance in interval, each other not directly contact.
Between described energy-storage pulsed capacitor and output ground electrode, be provided with the capacitor insulation cover, capacitor insulation cover and insulator and energy-storage pulsed capacitor consist of cavity volume, and the part of described high-field electrode, trigger electrode and output ground electrode is positioned at cavity volume.Further specifically, in energy-storage pulsed capacitor the capacitor insulation cover is installed, the output ground electrode is installed at the top of capacitor insulation cover, output ground electrode integral body is circular, its xsect is step-like, form two different annulus, the ring that wherein diameter is larger is installed in capacitor insulation cover top, and be fixed on ribbon feeder electric pole plate and the ribbon feeder lower electrode plate by lower insulated tension pole, the output ground electrode at top is connected with the ribbon feeder electric pole plate by transition disc, the insulator top is equipped with upper cover plate, upper cover plate is being fixed on insulator on the output ground electrode under the traction action of upper insulated tension pole, the end that output ground electrode diameter is less is relative with high-field electrode, and the centre is placed with the end of trigger electrode, so the assembly type assembly structure, be convenient to installation and removal, utilize the capacitor insulation cover of energy-storage pulsed capacitor as the air chamber of elementary discharge switch, accomplish compact conformation, be conducive to reduce the inductance of module.
Be provided with vent hole at described insulator.Further, the circulation for the ease of air in electric field distortion is provided with vent hole at insulator, and vent hole is in communication with the outside cavity volume, can play well the effect of intake and exhaust.
Described secondary switch body comprises Switch main body, and described ribbon feeder electric pole plate is connected with target chamber by Switch main body, secondary discharge switch electrode, the excessive plate of disk that connects successively.The ribbon feeder electric pole plate passes through Switch main body, the secondary discharge switch electrode, the excessive plate of disk is connected with target chamber, target chamber is as another extraction pole of load, after the Switch main body conducting, the large function of current is on load the two poles of the earth, be used for the research physical property, in target chamber and cylindrical shape, between the electrode insulating cylinder is set, be used for the insulating property between maintenance the two poles of the earth, secondary discharge switch and sharpening capacitor device are installed in the discharge loop of strong magnetic pressure oblique wave charger, mainly be for the steepness discharge current waveform, originally the discharge current rise time (being first 1/4th cycle) shortens, but the sharpening capacitor device is in the also effect of its shunting of discharge initial stage simultaneously, the electric current that the energy-storage capacitor of front end discharges is to the sharpening capacitor device group charging of rear end, can suitably reduce like this initial current peak value of load end, so that load end obtains one initially to recessed discharge current curves, be different from the sinusoidal current curve that rises, so more be conducive to the design of Physical Experiment sample.
Described Switch main body comprises organic glass shell, and middle transition ball electrode and track electrode are installed in the cavity in the organic glass housing, and described track electrode is connected with the ribbon feeder electric pole plate by L shaped battery lead plate.Further, Switch main body comprises organic glass shell, middle transition ball electrode is installed in the cavity in the organic glass housing, and track electrode, form voltage self breakdown discharge mode of operation, when energy-storage pulsed capacitor by elementary discharge switch conducting discharging time, electromagnetic wave transmits to the back-end through the ribbon feeder electric pole plate, form a time dependent high voltage U (t) at the track electrode, the track electrode of the secondary discharge switch other end is in earth potential, when voltage is increased to a certain value, gap between the track electrode and gas insufficient pressure are when bearing this voltage, just puncture, the conducting discharge, so, by spacing and the gaseous species between middle transition ball electrode and the track electrode in the adjustment organic glass housing, and gas pressure intensity is regulated the self breakdown time.
Described ribbon feeder lower electrode plate is connected with electrode in the cylindrical shape by cylindrical electrode, between cylindrical electrode and the excessive plate of disk insulating boot is installed.
Described load cavity comprises outer target chamber and target chamber, in target chamber, be provided with the target sample top electrode that connects by the load region electric pole plate, target sample bottom electrode is installed below target sample top electrode, target sample bottom electrode is connected with the ribbon feeder lower electrode plate by the load region lower electrode plate, between load region electric pole plate and load region lower electrode plate thin dielectric film is installed.Specifically, outer target chamber is cylindric, its inside is equipped with target chamber, the middle part of target chamber is to the step-like annulus of projecting inward formation, at annulus the load region electric pole plate is installed, the load region electric pole plate connects target sample top electrode, the load region lower electrode plate is installed below annulus, be connected with target sample bottom electrode on the load region lower electrode plate, between load region electric pole plate and load region lower electrode plate, thin dielectric film is installed, thin dielectric film extends and target sample top electrode and target sample bottom electrode is separated, and target sample top electrode is connected short-circuiting bar direct short-circuit and connects with target sample bottom electrode.So, target chamber places on the load region battery lead plate, is used for installing vaccum-pumping equipment, regulates the gaseous tension of solid material experimental situation, the high speed fragments that produces when also being used for prevention simultaneously, Protection chamber instrument; Load region electric pole plate and load region lower electrode plate are used for installing sample electrode, and be connected with ribbon feeder electric pole plate and ribbon feeder lower electrode plate respectively, solid sample places in the thorax hole of target sample top electrode, target sample bottom electrode, target sample top electrode is connected short-circuit piece to connect with target sample bottom electrode, the pulse high current target sample top electrode of flowing through is crossed target sample bottom electrode through the short-circuit piece reverse direction flow again; On target sample top electrode and target sample bottom electrode, this pulse high current and self-induced magnetic field interaction produce large Lorentz force, i.e. a magnetic pressure.
Described sharpening capacitor utensil has sharpening high-field electrode and sharpening ground electrode, the sharpening high-field electrode of sharpening capacitor device is connected with ribbon feeder electric pole plate and ribbon feeder lower electrode plate with the sharpening ground electrode and is connected, and between the sharpening high-field electrode of sharpening capacitor device and sharpening ground electrode nylon plate and the silicon rubber pad that stacks is installed.
The present invention compared with prior art has following advantage and beneficial effect:
A kind of device of in solid material, realizing strong magnetic pressure oblique wave loading of 1 the present invention, utilize the high-voltage power source to give a plurality of primary switch bulk chargings to predeterminated voltage 60kV～90kV, then under the effect of high-voltage pulse trigger voltage pulse output, primary switch body generation field distortion conducting discharge, energy moment of primary switch body discharges in the time scale of several microseconds, ribbon feeder electric pole plate and ribbon feeder lower electrode plate through symmetrical structure are transferred to the load cavity, and the discharge waveform adjusting is carried out through sharpening capacitor device and secondary switch body in the centre; On the target sample electrode, this pulse high current and self-induced magnetic field interaction, produce a large Lorentz force, it is magnetic pressure, act on the loading surface of the upper and lower electrode of sample, through-thickness is on the inner solid sample that outwards is transmitted in the upper and lower electrode thorax of the sample hole, solid sample obtains the approximate uniform rise time 470ns～600ns that distributes, loads the magnetic pressure oblique wave of amplitude 1GPa～100GPa, realizes the accurate isentropic compression of material;
A kind of device of realizing that in solid material strong magnetic pressure oblique wave loads of 2 the present invention can be used for emission rate and reach macroscopical metal film flying more than hundreds of metre per second (m/s) to ten km per seconds, the impact compress of realization material or the hypervelocity impact of structure;
A kind of device of in solid material, realizing strong magnetic pressure oblique wave loading of 3 the present invention, can also expand the application to other loading technique, the large electric current that for example utilizes this device to produce, can realize that the metal forming discharge-induced explosion drives the High Speed Flyer experimental technique, can realize the implosion experimental technique of metal sleeve under the low pressure etc.
Description of drawings
Fig. 1 is that the present invention uses the status architecture synoptic diagram;
Fig. 2 is primary switch structural representation of the present invention;
Fig. 3 is primary switch installment state sectional structure chart of the present invention;
Fig. 4 is target chamber of the present invention district diagrammatic cross-section;
Fig. 5 is A section structure for amplifying synoptic diagram among Fig. 4;
Fig. 6 is sharpening capacitor device installment state diagrammatic cross-section of the present invention;
Fig. 7 is short circuit discharge current curves experimental result among the embodiment;
Fig. 8 drives metallic aluminium film flying experimental results among the embodiment.
Mark and corresponding parts title in the accompanying drawing:
The 1-base plate, 2-support, 3-height adjuster, 5-high-voltage power source, 6-high-voltage pulse trigger, 8-upper cover plate, the 9-insulator, 10-vent hole, the upper insulated tension pole of 11-, 12-high-field electrode fixed bar, 13-trigger electrode, 14-high-field electrode, 15-exports ground electrode, insulated tension pole under the 16-, 17-capacitor lead-out electrode, the 18-transition disc, 19-ribbon feeder electric pole plate, 20-insulation film, 21-ribbon feeder lower electrode plate, 22-capacitor insulation cover, the 23-energy-storage pulsed capacitor, 24-housing screw, 25-stainless steel gasket, 26-sharpening high-field electrode, 27-sharpening ground electrode, 28-silicon rubber pad, 29-nylon plate, 30-sharpening capacitor device, the outer target chamber of 31-, 32-target chamber, 33-target sample top electrode, 34-target sample bottom electrode, the 35-thin dielectric film, 36-load region electric pole plate, 37-load region lower electrode plate, the 38-insulating cylinder, electrode in the 39-cylindrical shape, 40-cylindrical electrode, 41-insulating boot, the excessive plate of 42-disk, 43-secondary discharge switch electrode, 44-organic glass housing, 45-middle transition ball electrode, 46-track electrode, 47-L shape battery lead plate.
Embodiment
The present invention is described in further detail below in conjunction with embodiment, but embodiments of the present invention are not limited to this.
Embodiment
Shown in Fig. 1 to 6, a kind of device of in solid material, realizing strong magnetic pressure oblique wave loading of the present invention, comprise base plate 1, at base plate 1 the ribbon feeder electric pole plate 19 that successively stack forms plate body is installed from top to bottom, insulation film 20, and ribbon feeder lower electrode plate 21, wherein insulation film 20 is opened the stack of the thick mylar of 0.1mm by 10-15 and is formed, between plate body and base plate 1, support 2 is installed, be provided with the height adjuster 3 of a plurality of adjustable plate heights on the support, be used for regulating the fixed range between plate body and the base plate 1, a primary switch body is installed between plate body and base plate 1, each primary switch body comprises an energy-storage pulsed capacitor 23, the top of energy-storage pulsed capacitor 23 has capacitor lead-out electrode 17, in energy-storage pulsed capacitor 23 capacitor insulation cover 22 is installed, output ground electrode 15 is installed at the top of capacitor insulation cover 22, output ground electrode 15 integral body are circular, its xsect is step-like, form two different annulus, the ring that wherein diameter is larger is installed in capacitor insulation cover 22 tops, the end that output ground electrode 15 diameters are less is relative with high-field electrode 14, and be fixed on the plate body by lower insulated tension pole 16, at capacitor insulation cover 22 tops insulator 9 is installed, capacitor insulation cover 22 and insulator 9, and energy-storage pulsed capacitor 23 consists of cavity volume; Insulator 9 tops are equipped with upper cover plate 8, upper cover plate 8 is being fixed on insulator 9 on the output ground electrode 15 under the traction action of upper insulated tension pole 11, insulator 9 normally adopts nylon material to make, its integral body is cylindrical, be provided with in the middle cable hole and vent hole 10, cable hole is used for and the connection of being connected, and vent hole 10 is in communication with the outside cavity volume; Be fixed with high-field electrode fixed bar 12 in the bottom of cable hole, high-field electrode fixed bar 12 extends insulator downwards, be set with high-field electrode 14 at its end, high-field electrode 14 is connected with container extraction electrode 17, container extraction electrode 17 is connected by the high-voltage power source 5 of cable with the outside, is energy-storage pulsed capacitor 23 chargings by high-voltage power source 5;
On high-field electrode fixed bar 12, also be installed with the trigger electrode 13 of ring-type, trigger electrode 13 is connected by the high-voltage pulse trigger 6 of cable with the external world, trigger electrode 13, high-field electrode 14 and output ground electrode 15 are in the same level height, take high-field electrode fixed bar 12 as axis, high-field electrode 14, trigger electrode 13, output ground electrode 15 are installed in the cavity volume according to diameter order from small to large is coaxial, and the distance that the interval is certain, each other not directly contact; The output ground electrode 15 at top is connected with ribbon feeder electric pole plate 19 by transition disc 18; At plate body 60-80 sharpening capacitor device 30 is installed, sharpening capacitor device 30 has sharpening high-field electrode 26 and sharpening ground electrode 27, the sharpening high-field electrode 26 of sharpening capacitor device 30 is connected with ribbon feeder electric pole plate 19 by housing screw 24, sharpening ground electrode 27 is connected with ribbon feeder lower electrode plate 21 by modes such as screws, between the sharpening high-field electrode 26 of sharpening capacitor device 30 and sharpening ground electrode 27 nylon plate 29 and the silicon rubber pad 28 that stacks is installed; At plate body 6-8 secondary switch body is installed, the secondary switch body comprises Switch main body, Switch main body comprises organic glass shell 44, middle transition ball electrode 45 and track electrode 46 are installed in the cavity in organic glass housing 44, and track electrode 46 is connected with ribbon feeder electric pole plate 19 by L shaped battery lead plate 47; Switch main body is connected with target chamber 32 by secondary discharge switch electrode 43, the excessive plate 42 of disk successively; Outer target chamber 31 also is installed on plate body, outer target chamber 31 is cylindric, its inside is equipped with target chamber 32, the middle part of target chamber 32 is to the step-like annulus of projecting inward formation, at annulus load region electric pole plate 36 is installed, load region electric pole plate 36 connects target sample top electrode 33, load region lower electrode plate 37 is installed below annulus, be connected with target sample bottom electrode 34 on the load region lower electrode plate 37, between load region electric pole plate 36 and load region lower electrode plate 37, thin dielectric film 35 is installed, thin dielectric film 35 is opened the thick Kapton stack of 0.025mm by 10-20 and is formed, thin dielectric film 25 extends and target sample top electrode 33 and target sample bottom electrode 34 is separated, and target sample top electrode 33 is connected with target sample bottom electrode by short-circuiting bar direct short-circuit connection; Electrode 39 in target chamber 32 inner installation cylindrical shapes, at target chamber 32 insulating cylinder 38 is installed between the electrode 39 in cylindrical shape, electrode 39 is connected with ribbon feeder lower electrode plate 21 by cylindrical electrode 40 in the cylindrical shape, between cylindrical electrode 40 and the excessive plate 42 of disk insulating boot 41 is installed.
A kind of device of in solid material, realizing strong magnetic pressure oblique wave loading of the present invention, its discharge loop is low impedance characteristic, load is inductive load, and the total inductance in loop is that resistance is not more than 5mW about 10nH, each module distribution inductance is: energy-storage pulsed capacitor 23 and primary switch group 3.4nH, plate body 3nH, 30 groups of 0.3～0.5nH of sharpening capacitor device, secondary switch group 2～3nH, load region electrode 2～3nH, target sample electrode 1～3nH; (target sample electrode inductance 1～2nH in the short circuit dischange situation, and dynamic change does not occur), during charging voltage 85kV, maximum discharge current of the present invention can reach about 4.2MA, rise time 470～600ns (0～100%), produce 100GPa with interior stress wave at metal sample, its specified energy storage appearance value 32mF, rated voltage 100kV, specified energy storage 160kJ can produce the pulse high current of rise time 470～600ns, amplitude 1～4MA on the short circuit load of 1～2nH.This device can produce at the solid metal sample oblique wave magnetic pressure of 1GPa～100GPa.
Install as shown in Figure 7 discharge current curves, in the present embodiment, when charging voltage is respectively 75kV, 80kV, 85kV, on the short circuit load of inductance 1-2nH, can produce the rise time pulse high current that (0-100%) 500～580ns, peak value are respectively 3.2MA, 3.6MA and 4.1MA; Can estimate the on-load pressure that reaches in the metal surface by following formula.
In the following formula
PBe the loading magnetic pressure,
k pBe geometrical form factors or title rim effect coefficient,
BBe target sample electrode district induced field,
m 0Be magnetic permeability,
IBe the current peak size,
wBe target sample electrode width.
When maximum discharge current was 3～4MA, target sample electrode width was 6mm, geometrical form factors
k pGot 0.6 o'clock, the magnetic pressure that obtains in the metal surface is 94～167GPa,
k pGetting the magnetic pressure that obtained in the metal surface at 0.5 o'clock is 78～139GPa.
Experimental results as shown in Figure 8, the magnetic pressure that utilizes said apparatus to produce, also can launch high speed metal film flying, in the present embodiment, utilize this device emission to be of a size of the aluminium film flying of 8mm * 6mm * 0.7mm, when the device charging voltage was 73kV, the speed of film flying reached about 9.2km/s, and displacement was about 4.3mm when film flying accelerated to this speed; When charging voltage was 75～80kV, film flying can reach higher speed, utilized magnetohydrodynamics software simulation flyer velocity can reach 12～15km/s.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and any simple modification, the equivalent variations on every foundation technical spirit of the present invention above embodiment done all fall within protection scope of the present invention.
Claims (10)
1. in solid material, realize the device that strong magnetic pressure oblique wave loads for one kind, comprising superposes from top to bottom successively forms ribbon feeder electric pole plate (19), insulation film (20) and the ribbon feeder lower electrode plate (21) of plate body, it is characterized in that: be provided with a plurality of primary switch bodies that are connected with plate body, a plurality of secondary switch body and sharpening capacitor device (30) and a load cavity at described plate body, described a plurality of primary switch bodies are connected 6 with high-voltage power source (5) with the high-voltage pulse trigger simultaneously) be connected.
2. a kind of device of realizing that in solid material strong magnetic pressure oblique wave loads according to claim 1, it is characterized in that: described primary switch body comprises energy-storage pulsed capacitor (23), the top of energy-storage pulsed capacitor (23) has capacitor lead-out electrode (17), in energy-storage pulsed capacitor (23) top switch body is installed, switch body has the high-field electrode (14) that is connected with capacitor lead-out electrode (17), and the output ground electrode (15) that is spaced apart with high-field electrode (14), between described high-field electrode (14) and output ground electrode (15), be provided with trigger electrode (13), output ground electrode (15) is connected with ribbon feeder electric pole plate (19), and trigger electrode (13) is connected with high-voltage pulse trigger (6).
3. a kind of device of realizing that in solid material strong magnetic pressure oblique wave loads according to claim 2, it is characterized in that: described switch body comprises insulator (9), insulator (9) is fixed on the output ground electrode (15), middle part at insulator (9) is provided with cable hole, the cable hole below is fixed with high-field electrode fixed bar (12), high-field electrode (14) is sleeved on high-field electrode fixed bar (12) and upward and with capacitor lead-out electrode (17) is connected, high-field electrode (14) is in the same level height with output ground electrode (15), described trigger electrode (13) is fixed on insulator (9) bottom, and its end is positioned between high-field electrode (14) and the output ground electrode (15).
4. a kind of device of realizing that in solid material strong magnetic pressure oblique wave loads according to claim 3, it is characterized in that: between described energy-storage pulsed capacitor (23) and output ground electrode (15), be provided with capacitor insulation cover (22), capacitor insulation cover (22) consists of cavity volume with insulator (9) and energy-storage pulsed capacitor (23), and the part of described high-field electrode (14), trigger electrode (13) and output ground electrode (15) is positioned at cavity volume.
5. a kind of device that strong magnetic pressure oblique wave loads of realizing in solid material according to claim 3 is characterized in that: be provided with vent hole (10) at described insulator (9).
6. the described a kind of device that strong magnetic pressure oblique wave loads of in solid material, realizing of any one in 5 according to claim 1, it is characterized in that: described secondary switch body comprises Switch main body, and described ribbon feeder electric pole plate (19) is connected with target chamber (32) by Switch main body, secondary discharge switch electrode (43), the excessive plate of disk (42) that connects successively.
7. a kind of device of realizing that in solid material strong magnetic pressure oblique wave loads according to claim 6, it is characterized in that: described Switch main body comprises organic glass shell (44), middle transition ball electrode (45) and track electrode (46) are installed in the cavity in organic glass housing (44), and described track electrode (46) is connected with ribbon feeder electric pole plate (19) by L shaped battery lead plate (47).
8. a kind of device of realizing that in solid material strong magnetic pressure oblique wave loads according to claim 6, it is characterized in that: described ribbon feeder lower electrode plate (21) is connected with electrode (39) in the cylindrical shape by cylindrical electrode (40), between cylindrical electrode (40) and the excessive plate of disk (42) insulating boot (41) is installed.
9. a kind of device of realizing that in solid material strong magnetic pressure oblique wave loads according to claim 6, it is characterized in that: described load cavity comprises outer target chamber (31), and target chamber (32), in target chamber (32), be provided with the target sample top electrode (33) that connects by load region electric pole plate (36), in target sample top electrode (33) below target sample bottom electrode (34) is installed, target sample bottom electrode (34) is connected with ribbon feeder lower electrode plate (21) by load region lower electrode plate (37), between load region electric pole plate (36) and load region lower electrode plate (37) thin dielectric film (35) is installed.
10. a kind of device of realizing that in solid material strong magnetic pressure oblique wave loads according to claim 6, it is characterized in that: described sharpening capacitor device (30) has sharpening high-field electrode (26) and sharpening ground electrode (27), the sharpening high-field electrode (26) of sharpening capacitor device (30) and sharpening ground electrode (27) respectively with ribbon feeder electric pole plate (19), and ribbon feeder lower electrode plate (21) connects, and between the sharpening high-field electrode (26) of sharpening capacitor device (30) and sharpening ground electrode (27) nylon plate (29) and the silicon rubber pad (28) that stacks is installed.
Priority Applications (1)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104991040A (en) * | 2015-07-13 | 2015-10-21 | 中国工程物理研究院流体物理研究所 | Experimental device and experimental method for cylindrical isentropic compression |
| CN105865651A (en) * | 2016-06-20 | 2016-08-17 | 中国工程物理研究院流体物理研究所 | System and method for measuring temperature of material under dynamic high-pressure loading on basis of reflectivity |
| CN107389455A (en) * | 2017-09-05 | 2017-11-24 | 中国工程物理研究院流体物理研究所 | The heat sink and method of sample initial temperature in being compressed for Magnetic driving oblique wave |
| CN111670495A (en) * | 2018-01-25 | 2020-09-15 | 株式会社村田制作所 | Electronic product with embedded porous dielectric, related semiconductor product and manufacturing method thereof |
| CN112768233A (en) * | 2020-12-29 | 2021-05-07 | 西北核技术研究所 | High-voltage megavolt coaxial-flat plate mixed type low-inductance pulse capacitor |
| CN114264562A (en) * | 2021-12-15 | 2022-04-01 | 扬州华航特钢有限公司 | High-precision deformation-preventing pressing process for deformed steel bar |
| CN114264562B (en) * | 2021-12-15 | 2024-05-31 | 扬州华航特钢有限公司 | High-precision deformation-preventing pressing process for deformed steel bars |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104991040A (en) * | 2015-07-13 | 2015-10-21 | 中国工程物理研究院流体物理研究所 | Experimental device and experimental method for cylindrical isentropic compression |
| CN105865651A (en) * | 2016-06-20 | 2016-08-17 | 中国工程物理研究院流体物理研究所 | System and method for measuring temperature of material under dynamic high-pressure loading on basis of reflectivity |
| CN107389455A (en) * | 2017-09-05 | 2017-11-24 | 中国工程物理研究院流体物理研究所 | The heat sink and method of sample initial temperature in being compressed for Magnetic driving oblique wave |
| CN111670495A (en) * | 2018-01-25 | 2020-09-15 | 株式会社村田制作所 | Electronic product with embedded porous dielectric, related semiconductor product and manufacturing method thereof |
| CN112768233A (en) * | 2020-12-29 | 2021-05-07 | 西北核技术研究所 | High-voltage megavolt coaxial-flat plate mixed type low-inductance pulse capacitor |
| CN114264562A (en) * | 2021-12-15 | 2022-04-01 | 扬州华航特钢有限公司 | High-precision deformation-preventing pressing process for deformed steel bar |
| CN114264562B (en) * | 2021-12-15 | 2024-05-31 | 扬州华航特钢有限公司 | High-precision deformation-preventing pressing process for deformed steel bars |
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