CN115132453A - FLTD pulse source for generating delay adjustable coaxial multi-pulse - Google Patents
FLTD pulse source for generating delay adjustable coaxial multi-pulse Download PDFInfo
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Abstract
The invention relates to a linear transformer driving source, in particular to an FLTD pulse source for generating delay-adjustable coaxial multi-pulse, which is used for solving the defects that the existing FLTD pulse source is difficult to output more than 3 coaxial multi-pulse due to the problems of crosstalk and isolation among pulses and the limitation that magnetic core volt-seconds and a plurality of branches respectively surround magnetic core structures with different numbers. The FLTD pulse source for generating the delay adjustable coaxial multi-pulse comprises M FLTD modules which are connected in series, and each discharge branch of each FLTD module comprises a gas switch, an upper pulse capacitor, a lower pulse capacitor, two high-voltage silicon stacks and two voltage-sharing devices; the invention adopts the unidirectional-conduction reverse-isolation discharge branch circuit to replace the conventional fast discharge branch circuit, and solves the problems of interference and electrical isolation between the branch circuits by respectively and sequentially triggering each stage of unidirectional-conduction reverse-isolation branch circuit of the FLTD in a delayed manner.
Description
Technical Field
The invention relates to a linear transformer driving source, in particular to an FLTD pulse source for generating delay-adjustable coaxial multi-pulse.
Background
The high-energy pulse X-ray flash photography can be used for perspective of the structure, state and evolution process of a high-speed moving substance, is an important diagnostic tool for fast transient processes such as high-performance explosive hydrodynamics experiments and the like, and is widely used for researching transient phenomena of internal structures of substances under impact loading, such as projectile intrariform motion, warhead fragment, armor breaking jet, penetration process of targets and the like. The generation of a plurality of coaxial high-energy X-ray pulses with adjustable time delay is a target which is pursued for decades in the field of pulsed X-ray flash photography, and a high-energy pulsed X-ray source mainly comprises an electron Linear Induction Accelerator (LIA) and an Induced Voltage Adder (IVA).
The LIA mainly comprises a preceding stage pulse power source, an injector, an accelerating cavity, beam transmission and focusing, a conversion target and the like. The front-stage pulse power source provides electric pulses (with the voltage of 200-300 kV) for the injector and the accelerating cavity, an electric field required by emission and acceleration of the high-current electron beam is established, the injector generates a pulse electron beam with the beam intensity of 1-5 kA and the initial energy of 1-4 MeV, the pulse electron beam is accelerated to tens of MeV through a tens of accelerating cavities, the electron beam bombards the high atomic number target, and high-energy pulse X rays are generated through bremsstrahlung. The LIA type flash accelerator has been developed for more than twenty years and can generate multiple pulses, such as the biaxial hydrodynamic camera DARHTII and the "shenlong second" accelerator of the middle courtyard developed in the usa in recent years, but the devices are large and complex and have extremely high manufacturing cost, so that the popularization and the application of the devices are limited.
The IVA type flash photography accelerator mainly comprises a preceding stage pulse power source, an induction cavity, a vacuum/magnetic insulation transmission line, a high-power small focal spot X-ray diode and the like, wherein a plurality of paths of electric pulses (the voltage is about 1MV, the current is 100-200 kA and the pulse width is 40-80 ns) generated by multi-stage pulse compression are fed into the multi-stage series connection IVA induction cavity according to the time sequence, the electric pulses fed into the induction cavities of all stages realize voltage superposition on an IVA secondary central conductor by utilizing the electromagnetic induction principle, the high-power electric pulses (the voltage is MV-dozens of MV and the current is hundreds of kA) are generated at the tail end of the central conductor of the secondary transmission line and loaded on a strong focusing electron beam diode, and the small focal spot high-energy pulse X-ray is generated in a bremsstrahlung mode.
The generation, acceleration, focusing and targeting of the electron beam of the IVA flash photography accelerator are all completed in a strong focusing diode, and the beam control problem of strong current electron beam acceleration, focusing and long-distance transmission is avoided. Compared with LIA, the IVA has more compact structure and higher cost effectiveness ratio, and has important application in the fields of strong pulse radiation environment simulation and pulse X-ray flash photography. Such as RITS-6 device and voltage 2MV biaxial Cygnus device of 8-10 MV, 150kA and 70ns developed by the Saint Asia national laboratory (SNL) in the United states, HRF of 14MV, 140kA and 60ns built by the UK atomic energy weapon center (AWE), AIRIX device in France, Jianguang I and Jianguang II of the China northwest nuclear technology research institute, and the like.
Various assumptions are made at home and abroad for generating delay-adjustable coaxial multi-pulse by utilizing an IVA accelerator, for example, at the beginning of RITS design, pulse breakdown polarity effect of a non-uniform electric field potential type gas switch is utilized to be matched with a magnetic switch, and the pulse fed into an induction cavity in a time-sharing manner is isolated to generate delay-adjustable double-pulse; SNL in the united states also proposed that multiple single pulses IVA be fed in series and time-shared to generate multiple pulses, but all have technical and engineering difficulties that are difficult to overcome.
Chinese patent ZL201410653360.1 proposes a method for generating three pulses with adjustable delay by utilizing time-sharing triggering of a serial Pulse Forming Line (PFL) and a gas switch, and sequentially feeding a low-remanence IVA induction cavity into a single port to generate coaxial delay adjustable multi-pulse, but because of the difficult problems of multi-pulse isolation, poor multi-pulse consistency formed by the serial connection of the PFL and the switch and the like, the output of coaxial delay adjustable multi-pulse by an IVA accelerator is not realized at home and abroad up to now.
In recent years, a Fast Linear Transformer Driver (FLTD) which is rapidly developed is also an IVA essentially, primary electric pulses fed into an IVA induction cavity are generated, formed and compressed by all units concentrated inside the induction cavity, and electric pulses with pulse widths of tens to hundreds of ns are directly generated by discharging through a Fast discharge branch, so that the structure is more compact, and the Fast Linear Transformer driver has a better application prospect in the aspect of pulse X-ray flash photography. The design of the single-pulse flash photo accelerator concept based on the FLTD technology with output voltages of 6.5MV, 8MV and 3MV is proposed in the United states, France and China respectively. France CEA in 2015 utilizes 10-level serial FLTD established by the device to discharge in a time-sharing manner through 2 discharge branches in each level of induction cavity, the discharge branches are coupled to secondary levels through half of magnetic cores to generate a first electric pulse through superposition and saturate the first electric pulse, the discharge branches surround the other half of the magnetic cores, two 700kV/10kA coaxial electric pulses are obtained by utilizing different modes of surrounding the magnetic cores by 2 branches, and the pulse interval can be adjusted within 200 ns-2 mu s. The method also has the problems of crosstalk and isolation among pulses, and the undischarged branch circuit is easy to self-discharge when the preamble pulse is output, so that the reliability of the system is reduced; when the subsequent pulse is generated, the insulation of the gas switch of the preamble pulse branch is not recovered (the insulation recovery time of the gas switch is about ms magnitude), so that the subsequent pulse becomes a load of the subsequent pulse and is shunted, and simultaneously, more than 3 coaxial multi-pulses are difficult to output due to the limitation that the magnetic core volt-seconds number and the structures that a plurality of branches respectively surround different numbers of magnetic cores.
In summary, the generation of 3 coaxial delay-adjustable electrical pulses based on IVA or FLTD techniques is not currently achieved.
Disclosure of Invention
The invention aims to solve the defects that more than 3 coaxial multi-pulses are difficult to output due to the problems of crosstalk and isolation among pulses of the conventional FLTD pulse source and the limitation that magnetic core volt-seconds and a plurality of branches respectively surround different numbers of magnetic core structures, and provides the FLTD pulse source capable of generating delay adjustable coaxial multi-pulses.
In order to solve the defects existing in the prior art, the invention provides the following technical solutions:
an FLTD pulse source for generating delay adjustable coaxial multi-pulse, which is characterized in that: the device comprises FLTD modules, wherein each FLTD module comprises an upper electrode plate, a lower electrode plate, an upper insulating plate, a lower insulating plate, a coaxial secondary transmission line outer cylinder assembly, a plurality of magnetic cores, N discrete conductors and N discharge branches; n is a positive integer greater than or equal to 1;
the coaxial secondary transmission line outer cylinder assembly comprises an upper electrode, a lower electrode and a middle insulator arranged between the upper electrode and the lower electrode;
the N discrete conductors and the N discharge branches are circumferentially and uniformly distributed on different circumferences between the upper electrode plate and the lower electrode plate, and the N discrete conductors are positioned on the peripheries of the N discharge branches;
an upper cavity is formed among the upper electrode plate, the upper electrode and the discharging branch circuit, a lower cavity is formed among the lower electrode plate, the lower electrode and the discharging branch circuit, the plurality of magnetic cores are respectively positioned in the upper cavity and the lower cavity, and the plurality of magnetic cores are low-remanence amorphous magnetic cores;
each discharge branch comprises a gas switch, the discharge branch is conducted when the current direction flows from positive polarity to negative polarity of the gas switch, and the discharge branch is cut off and isolated when the current direction flows from the negative polarity to the positive polarity of the gas switch;
the lower electrode plate of the FLTD module is at the ground potential; an upper electrode plate of the FLTD module is connected with a lower electrode plate through a load and a coaxial secondary transmission line inner cylinder in sequence.
Furthermore, each discharging branch comprises an upper pulse capacitor, a lower pulse capacitor, two high-voltage silicon stacks and two voltage-sharing devices; the upper pulse capacitor and the lower pulse capacitor are arranged in a superposed mode and are insulated through an intermediate insulator, the gas switch is electrically connected with the upper pulse capacitor and the lower pulse capacitor respectively, the upper pulse capacitor is connected with an upper electrode through a high-voltage silicon stack, and the lower pulse capacitor is connected with a lower electrode through the high-voltage silicon stack; and the two high-voltage silicon stacks are connected in parallel with a voltage equalizing device.
Furthermore, annular plates extending outwards are arranged at the lower end of the upper electrode and the upper end of the lower electrode; the middle insulator is positioned between the two annular plates; the upper pulse capacitor is connected with the annular plate of the upper electrode through the high-voltage silicon stack, and the lower pulse capacitor is connected with the annular plate of the lower electrode through the high-voltage silicon stack.
Further, the voltage equalizing device is a voltage equalizing resistor or a voltage equalizing capacitor.
Further, the resistance value of the voltage equalizing resistor is in the order of k omega.
Meanwhile, the invention also provides an FLTD pulse source for generating delay-adjustable coaxial multi-pulse, which is characterized in that: the device comprises M FLTD modules which are connected in series, wherein each FLTD module comprises an upper electrode plate, a lower electrode plate, an upper insulating plate, a lower insulating plate, a coaxial secondary transmission line outer cylinder assembly, a plurality of magnetic cores, N discrete conductors and N discharge branches; m is a positive integer greater than or equal to 2, and N is a positive integer greater than or equal to 1;
the coaxial secondary transmission line outer cylinder assembly comprises an upper electrode, a lower electrode and a middle insulator arranged between the upper electrode and the lower electrode;
the N discrete conductors and the N discharge branches are circumferentially and uniformly distributed on different circumferences between the upper electrode plate and the lower electrode plate respectively, and the N discrete conductors are positioned on the peripheries of the N discharge branches;
an upper cavity is formed among the upper electrode plate, the upper electrode and the discharging branch, a lower cavity is formed among the lower electrode plate, the lower electrode and the discharging branch, the plurality of magnetic cores are respectively positioned in the upper cavity and the lower cavity, and the plurality of magnetic cores are low-remanence amorphous magnetic cores;
each discharge branch circuit comprises a gas switch, the discharge branch circuit is conducted when the current direction flows from the positive polarity to the negative polarity of the gas switch, and the discharge branch circuit is cut off and isolated when the current direction flows from the negative polarity to the positive polarity of the gas switch;
the lower electrode plate of the L-th FLTD module is the upper electrode plate of the L + 1-th FLTD module and is at the ground potential; l is more than or equal to 1 and less than or equal to M-1;
the upper electrode plate of the first FLTD module is connected with the lower electrode plate of the Mth FLTD module sequentially through the load and the coaxial secondary transmission line inner cylinder.
Furthermore, each discharge branch comprises an upper pulse capacitor, a lower pulse capacitor, two high-voltage silicon stacks and two voltage-sharing devices; the upper pulse capacitor and the lower pulse capacitor are arranged in a superposed mode and are insulated through an intermediate insulator, the gas switch is electrically connected with the upper pulse capacitor and the lower pulse capacitor respectively, the upper pulse capacitor is connected with an upper electrode through a high-voltage silicon stack, and the lower pulse capacitor is connected with a lower electrode through the high-voltage silicon stack; and the two high-voltage silicon stacks are connected in parallel with a voltage equalizing device.
Furthermore, annular plates extending outwards are arranged at the lower end of the upper electrode and the upper end of the lower electrode; the middle insulator is positioned between the two annular plates; the upper pulse capacitor is connected with the annular plate of the upper electrode through the high-voltage silicon stack, and the lower pulse capacitor is connected with the annular plate of the lower electrode through the high-voltage silicon stack.
Further, the voltage equalizing device is a voltage equalizing resistor or a voltage equalizing capacitor.
Further, the resistance value of the voltage equalizing resistor is in the order of k omega.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention relates to an FLTD pulse source for generating delay-adjustable coaxial multi-pulse, which comprises M FLTD modules connected in series, wherein each discharge branch of each FLTD module comprises a gas switch, an upper pulse capacitor, a lower pulse capacitor, two high-voltage silicon stacks and two voltage-sharing devices; the invention adopts the unidirectional conduction reverse isolation discharge branch circuit to replace the conventional fast discharge branch circuit, and solves the problems of interference and electrical isolation between the branch circuits by respectively triggering each stage of unidirectional conduction reverse isolation branch circuit of the FLTD in a delayed mode in sequence.
(2) The induction cavity of the FLTD pulse source for generating the delay adjustable coaxial multi-pulse adopts a low-remanence fast-time response magnetic core to avoid the problem of fast magnetic core reset among the multi-pulse, and then triggers branches at the same position in each induction cavity of the multi-stage series FLTD in a time-sharing manner (according to the delay requirement). The invention has important application prospect in the aspect of pulse X-ray framing flash photography in the high-speed transient process.
(3) According to the FLTD pulse source for generating the delay-adjustable coaxial multi-pulse, the high-voltage silicon stack unidirectional conduction reverse isolation function is utilized, a conventional FLTD branch is connected with the high-voltage silicon stack in series to obtain a fast discharge branch with unidirectional conduction reverse isolation, each stage of unidirectional conduction reverse isolation branch of the FLTD is respectively delayed and triggered in sequence, and the generation of the delay-adjustable coaxial multi-pulse is realized.
Drawings
FIG. 1 is a schematic diagram of an FLTD pulse source for generating delay-tunable coaxial multiple pulses according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the FLTD pulse source in the embodiment of FIG. 1;
fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
The reference numerals are illustrated below: 11-upper electrode plate, 12-lower electrode plate; 21-upper insulating plate, 22-lower insulating plate; 31-upper electrode, 32-lower electrode, 33-intermediate insulator; 4-a magnetic core; 5-a discrete conductor; s-gas switch; c1 — upper pulse capacitor; c2 — lower pulse capacitor; HVD-high voltage silicon stack; r-pressure equalizing device; 6-loading; 7-inner cylinder of coaxial secondary transmission line.
Detailed Description
The invention will be further described with reference to the drawings and exemplary embodiments.
Example one
Referring to fig. 1 and 2, the FLTD pulse source for generating delay-adjustable coaxial multi-pulses comprises M FLTD modules connected in series, wherein each FLTD module comprises an upper electrode plate 11, a lower electrode plate 12, an upper insulating plate 21, a lower insulating plate 22, a coaxial secondary transmission line outer cylinder assembly, a plurality of magnetic cores 4, N discrete conductors 5 and N discharge branches. In this embodiment, N is 6.
The coaxial secondary transmission line outer barrel assembly includes an upper electrode 31, a lower electrode 32, and an intermediate insulator 33 disposed between the upper electrode 31 and the lower electrode 32.
The N discrete conductors 5 and the N discharge branches are circumferentially and uniformly distributed on different circumferences between the upper electrode plate 11 and the lower electrode plate 12, and the N discrete conductors 5 are positioned on the peripheries of the N discharge branches.
An upper cavity is formed among the upper electrode plate 11, the upper electrode 31 and the discharging branch, a lower cavity is formed among the lower electrode plate 12, the lower electrode 32 and the discharging branch, the plurality of magnetic cores 4 are respectively positioned in the upper cavity and the lower cavity, and the plurality of magnetic cores 4 are low-remanence amorphous magnetic cores.
Each discharge branch comprises a gas switch S, an upper pulse capacitor C1, a lower pulse capacitor C2, two high-voltage silicon stacks HVDs and two voltage-sharing resistors/capacitors; the two pulse capacitors are arranged in an overlapping mode and are insulated through an intermediate insulator 33, the gas switch S is respectively electrically connected with the upper pulse capacitor C1 and the lower pulse capacitor C2, the upper pulse capacitor C1 is connected with the upper electrode 31 through a high-voltage silicon stack HVD, and the lower pulse capacitor C2 is connected with the lower electrode 32 through the high-voltage silicon stack HVD; the two high-voltage silicon stacks HVDs are connected with a voltage-sharing resistor in parallel; and the high-voltage silicon stack HVD and the voltage-sharing resistor connected in parallel form a branch charging loop.
The lower electrode plate 12 of the FLTD module is at the ground potential, and the upper electrode plate 11 of the FLTD module is connected with the lower electrode plate 12 sequentially through the load 6 and the coaxial secondary transmission line inner cylinder 7.
The gas switch S adopts a field distortion gas switch S with working voltage of +/-100 kV, the upper pulse capacitor C1 and the lower pulse capacitor C2 both adopt 20nF/100kV single-ended leading-out electrode plastic shell capacitors, and the high-voltage silicon stack HVD both adopts a nominal 30kV/2A fast closing and reverse blocking silicon stack.
The principle experiment of the embodiment shows that the two branches drive the same resistance load 6, charging is +/-25 kV, double pulses with adjustable time delay can be generated, the peak current of the double pulses is 3.5kA, and the voltage is 30kV, so that the method is feasible from principle to technology.
The working principle of the invention is as follows: referring to fig. 1, in the same FLTD module, when a trigger pulse is applied to 1 branch in the sensing cavity, this embodiment is a branch on the left side of the symmetry line, the gas switch S of this branch is closed, the current direction of the branch flows from the positive polarity to the negative polarity of the switch, as shown by arrow I1 in fig. 1, and the high-voltage silicon stack HVD connected in series with the upper pulse capacitor C1 or the lower pulse capacitor C2 is in the positive direction and is in a low-resistance conducting state;
under the indicated charging voltage polarity, the pulse voltage output by the first triggering branch is electrically insulated by the middle insulator 33, the upper electrode 31 is negative, the lower electrode 32 is positive, two high-voltage silicon stacks HVD connected in series with the output electrodes of the upper pulse capacitor C1 and the lower pulse capacitor C2 of the non-triggering branch are in a reverse cut-off state, the pulse voltage output by the first triggering branch is distributed between the high-voltage silicon stacks HVD in the reverse cut-off state and the equivalent impedance formed by the upper pulse capacitor C1 or the lower pulse capacitor C2, the voltage amplitude borne by the high-voltage silicon stacks HVD depends on the ratio of the equivalent impedance of the high-voltage silicon stacks HVD to the equivalent impedance of the gas switch S, the coupling voltage of the gas switch S of the non-triggering branch is smaller than that of the high-voltage silicon stacks HVD without series isolation, and the influence of the first triggering branch on the gas switch S of the non-discharging branch is reduced; the equivalent impedance of the branch circuit which is not triggered is far greater than the impedance of the load 6, and the electric pulse current and the power generated by the branch circuit which is not triggered firstly mainly flow to the load 6;
the HVD current reverse cut-off recovery time of the rapid high-voltage silicon stack is about 100ns, so that the minimum time delay interval for generating electric pulses is required to be larger than the HVD reverse cut-off recovery time of the high-voltage silicon stack; the insulation recovery time of the gas switch S is about 1ms magnitude, when coaxial multi-pulse with the interval time less than 1ms is generated, the gas switch S of the triggering branch is always In a closed low-resistance state firstly, at the moment, the subsequent triggering pulse (set according to the required delay time) is applied to the Nth branch, taking the branch on the right side of the axis as an example, the gas switch S of the branch is closed, the current direction is shown as In figure 1, the polarity of the output electric pulse is still the upper electrode 31 In negative polarity, the lower electrode 32 In positive polarity, all the parallel discharging branch output electrodes In the same stage of induction cavity are connected to the coaxial secondary transmission line outer cylinder assembly, the high-voltage silicon stacks HVD of the triggering branch and the non-triggering branch are In a current reverse cut-off state and are isolated from the discharging branch, and the current is transmitted to the load 6.
Example two
For the multi-stage serial FLTD, as shown in fig. 3, M is 2 in this embodiment, and the specific parameters of the FLTD module are the same as those in embodiment 1; the lower electrode plate 12 of the first FLTD module is the upper electrode plate 11 of the second FLTD module and is at the ground potential; the upper electrode plate of the first FLTD module is connected with the lower electrode plate of the second FLTD module sequentially through the load and the inner cylinder of the coaxial secondary transmission line.
As long as the branches at the same position of each stage are sequentially triggered according to an ideal IVA time sequence, M stages of serial stages are independent and do not influence each other; the process of generating coaxial multi-pulse in each stage is the same as that of a single stage; by utilizing electromagnetic induction, the output voltages of the multi-stage series branches are superposed, M times of pulse voltage is generated at the tail end of the inner cylinder 7 of the coaxial secondary transmission line and is applied to a load 6, and M is the number of the FLTD modules connected in series.
In order to facilitate reliable reverse cut-off of the HVD when the branch circuit discharges as soon as possible, the single-branch driving impedance selects over damping (such as 2 times damping), and the driving impedance comprises secondary transmission line impedance and load impedance; the branch with the high-voltage silicon stack HVD is not used for driving the short-circuit load 6, and the reverse direction current is too large when the short-circuit load 6 is driven, so that the high-voltage silicon stack HVD can not be cut off and is damaged.
The above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (10)
1. An FLTD pulse source that produces delay tunable coaxial multipulses, comprising: the device comprises an FLTD module, wherein the FLTD module comprises an upper electrode plate (11), a lower electrode plate (12), an upper insulating plate (21), a lower insulating plate (22), a coaxial secondary transmission line outer cylinder assembly, a plurality of magnetic cores (4), N discrete conductors (5) and N discharge branches; n is a positive integer greater than or equal to 1;
the coaxial secondary transmission line outer cylinder assembly comprises an upper electrode (31), a lower electrode (32) and an intermediate insulator (33) arranged between the upper electrode (31) and the lower electrode (32);
the N discrete conductors (5) and the N discharge branches are circumferentially and uniformly distributed on different circumferences between the upper electrode plate (11) and the lower electrode plate (12) respectively, and the N discrete conductors (5) are positioned on the peripheries of the N discharge branches;
an upper cavity is formed among the upper electrode plate (11), the upper electrode (31) and the discharging branch, a lower cavity is formed among the lower electrode plate (12), the lower electrode (32) and the discharging branch, the plurality of magnetic cores (4) are respectively positioned in the upper cavity and the lower cavity, and the plurality of magnetic cores (4) are low-remanence amorphous magnetic cores;
each discharge branch comprises a gas switch (S), the discharge branch is conducted when the current direction flows from the positive polarity to the negative polarity of the gas switch (S), and the discharge branch is cut off and isolated when the current direction flows from the negative polarity to the positive polarity of the gas switch (S);
a lower electrode plate (12) of the FLTD module is at ground potential, and an upper electrode plate (11) of the FLTD module is connected with the lower electrode plate (12) sequentially through a load (6) and a coaxial secondary transmission line inner cylinder (7).
2. An FLTD pulse source that produces delay tunable coaxial multipulses according to claim 1, wherein: each discharging branch comprises an upper pulse capacitor (C1), a lower pulse capacitor (C2), two high voltage silicon Stacks (HVDs) and two voltage equalizing devices (R); the upper pulse capacitor (C1) and the lower pulse capacitor (C2) are arranged in a superposed mode and are insulated through a middle insulator (33), the positive electrode and the negative electrode of the gas switch (S) are respectively and electrically connected with the upper pulse capacitor (C1) and the lower pulse capacitor (C2), the upper pulse capacitor (C1) is connected with the upper electrode (31) through a high-voltage silicon stack (HVD), and the lower pulse capacitor (C2) is connected with the lower electrode (32) through the high-voltage silicon stack (HVD); and the two high-voltage silicon Stacks (HVDs) are connected with a voltage equalizing device (R) in parallel.
3. An FLTD pulse source for generating delay tunable coaxial multi-pulses according to claim 2, wherein: annular plates extending outwards are arranged at the lower end of the upper electrode (31) and the upper end of the lower electrode (32); the intermediate insulator (33) is positioned between the two annular plates; the upper pulse capacitor (C1) is connected to the annular plate of the upper electrode (31) through a high voltage silicon stack (HVD), and the lower pulse capacitor (C2) is connected to the annular plate of the lower electrode (32) through a high voltage silicon stack (HVD).
4. An FLTD pulse source for generating delay-adjustable coaxial multi-pulses according to claim 2 or 3, characterized in that: the voltage equalizing device (R) is an equalizing resistor or an equalizing capacitor.
5. An FLTD pulse source to generate delay tunable coaxial multi-pulses according to claim 4, characterized in that: the resistance value of the voltage-sharing resistor is in the order of k omega.
6. An FLTD pulse source that produces delay tunable coaxial multipulses, comprising: the device comprises M FLTD modules which are connected in series, wherein each FLTD module comprises an upper electrode plate (11), a lower electrode plate (12), an upper insulating plate (21), a lower insulating plate (22), a coaxial secondary transmission line outer cylinder assembly, a plurality of magnetic cores (4), N discrete conductors (5) and N discharge branches; m is a positive integer greater than or equal to 2, and N is a positive integer greater than or equal to 1;
the coaxial secondary transmission line outer cylinder assembly comprises an upper electrode (31), a lower electrode (32) and an intermediate insulator (33) arranged between the upper electrode (31) and the lower electrode (32);
the N discrete conductors (5) and the N discharge branches are respectively circumferentially and uniformly distributed on different circumferences between the upper electrode plate (11) and the lower electrode plate (12), and the N discrete conductors (5) are positioned on the peripheries of the N discharge branches;
an upper cavity is formed among the upper electrode plate (11), the upper electrode (31) and the discharge branch, a lower cavity is formed among the lower electrode plate (12), the lower electrode (32) and the discharge branch, the magnetic cores (4) are respectively positioned in the upper cavity and the lower cavity, and the magnetic cores (4) are low-remanence amorphous magnetic cores;
each discharge branch comprises a gas switch (S), the discharge branch is conducted when the current direction flows from the positive polarity to the negative polarity of the gas switch (S), and the discharge branch is cut off and isolated when the current direction flows from the negative polarity to the positive polarity of the gas switch (S);
the lower electrode plate (12) of the L-th FLTD module is an upper electrode plate (11) of the L + 1-th FLTD module and is at the ground potential; l is more than or equal to 1 and less than or equal to M-1;
an upper electrode plate (11) of the first FLTD module is connected with a lower electrode plate (12) of the Mth FLTD module sequentially through a load (6) and a coaxial secondary transmission line inner barrel (7).
7. An FLTD pulse source to generate delay tunable coaxial multi-pulses according to claim 6, characterized in that: each discharging branch comprises an upper pulse capacitor (C1), a lower pulse capacitor (C2), two high voltage silicon Stacks (HVDs) and two voltage-sharing devices (R); the upper pulse capacitor (C1) and the lower pulse capacitor (C2) are arranged in a superposed mode and are insulated through a middle insulator (33), the positive electrode and the negative electrode of the gas switch (S) are respectively and electrically connected with the upper pulse capacitor (C1) and the lower pulse capacitor (C2), the upper pulse capacitor (C1) is connected with the upper electrode (31) through a high-voltage silicon stack (HVD), and the lower pulse capacitor (C2) is connected with the lower electrode (32) through the high-voltage silicon stack (HVD); and the two high-voltage silicon Stacks (HVDs) are connected with a voltage equalizing device (R) in parallel.
8. An FLTD pulse source generating delay tunable coaxial multi-pulses according to claim 7, characterized in that: annular plates extending outwards are arranged at the lower end of the upper electrode (31) and the upper end of the lower electrode (32); the intermediate insulator (33) is positioned between the two annular plates; the upper pulse capacitor (C1) is connected to the annular plate of the upper electrode (31) through a high voltage silicon stack (HVD), and the lower pulse capacitor (C2) is connected to the annular plate of the lower electrode (32) through a high voltage silicon stack (HVD).
9. An FLTD pulse source for generating delay tunable coaxial multi-pulses as claimed in claim 7 or 8, wherein: the voltage-sharing device (R) is a voltage-sharing resistor or a voltage-sharing capacitor.
10. An FLTD pulse source for generating delay-tunable coaxial multi-pulses as claimed in claim 9, wherein: the resistance value of the voltage-sharing resistor is in the order of k omega.
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| CN101951146A (en) * | 2010-09-21 | 2011-01-19 | 哈尔滨工业大学 | High pressure pulse modulator and modulation method thereof for steep falling edge and low power consumption plasma immersion ion implantation |
| CN104079189A (en) * | 2014-07-21 | 2014-10-01 | 彭亚斌 | Charging source for high-voltage capacitor |
| US20170117089A1 (en) * | 2014-04-07 | 2017-04-27 | Secretary, Department Of Atomic Energy | Compact Pulse Transformer with Transmission Line Embodiment |
| JP2017187886A (en) * | 2016-04-04 | 2017-10-12 | 株式会社ジャパンディスプレイ | Display device |
| US20190230779A1 (en) * | 2018-01-22 | 2019-07-25 | Transient Plasma Systems, Inc. | Inductively coupled pulsed rf voltage multiplier |
| CN110098760A (en) * | 2019-05-05 | 2019-08-06 | 西北核技术研究所 | A kind of FLTD device and its assembly method, maintaining method convenient for safeguarding |
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| US20170117089A1 (en) * | 2014-04-07 | 2017-04-27 | Secretary, Department Of Atomic Energy | Compact Pulse Transformer with Transmission Line Embodiment |
| CN104079189A (en) * | 2014-07-21 | 2014-10-01 | 彭亚斌 | Charging source for high-voltage capacitor |
| JP2017187886A (en) * | 2016-04-04 | 2017-10-12 | 株式会社ジャパンディスプレイ | Display device |
| US20190230779A1 (en) * | 2018-01-22 | 2019-07-25 | Transient Plasma Systems, Inc. | Inductively coupled pulsed rf voltage multiplier |
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