JPH08316796A - Magnetic pulse compressing device - Google Patents

Abstract

PURPOSE: To allow a voltage peak value and a pulse width of an output to be variable. CONSTITUTION: The magnetic pulse compressing device is formed by capacitor units 23A, 25A containing capacitors and saturable reactors independently in cases, a saturable reactor 24A, and connecting electrically with connection metallic fixtures 237, 238, 247, 248, 257 removably. Thus, each unit is easily replaced, then the output pulse voltage and pulse width are easily changed by preparing in advance the capacitor units 23A, 25A with different capacitance and plural saturable reactor units 24A incorporating the saturable reactor 24 with different specifications such as inductance at saturation and voltage time product so as to combine them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic pulse used in a high-power pulse power source for generating a high-power pulse having an extremely small pulse width used as a pulse power source in a pulse laser, a particle accelerator, an X-ray generator or the like. It relates to a compression device.

[0002]

2. Description of the Related Art A high-output pulse power supply used for the above-mentioned applications requires a pulse having a very small pulse width of several hundred nanoseconds and a peak current of several kiloamperes. Becomes In order to obtain a pulse having such a high voltage, large current and small pulse width, the pulse width is compressed by the magnetic pulse compression device.

As is well known, as a pulse generator for generating a high-power pulse, a shock voltage generator for generating a pulse simulating a lightning surge or a switching surge is known. It has been known. In fact, such a conventional pulse generator cannot obtain a pulse having a small pulse width suitable for the above-mentioned use. Therefore, a magnetic pulse compressor is used to compress the pulse width of the output pulse of a conventional pulse generator to produce a pulse with a smaller pulse width.

FIG. 6 is a circuit diagram of a magnetic pulse compression device and devices provided in the periphery thereof. In this drawing, the input terminal at the left end of the magnetic pulse compression device 2 in the drawing is connected to the pulse power supply 1, and the output terminal at the right end is connected to the load 4. The pulse power supply 1 comprises a series circuit of a capacitor 11, a switch 12 and a linear inductor 13, and the capacitor 11 is charged from a DC power supply (not shown) via a resistor. The magnetic pulse compressor 2 has two capacitors 2
1 and 23 and two saturable reactors 22 and 24, capacitors 21 and 23 form a ladder circuit in which parallel elements and saturable reactors 22 and 24 are series elements as shown in the figure.

The saturable reactor 22 includes a main coil 22.
1, a reset coil 222, and a core 223, and the reset coil 222 is connected to the reset circuit 3. The reset circuit 3 includes a DC power source 31 and a variable resistor 32.
The reset current can be adjusted appropriately. Saturable reactor 24, reset circuit 3
Although 0 also has different specifications of the respective circuit elements, the circuit configuration is the same as that of the saturable reactor 22 and the reset circuit 3, and therefore description thereof is omitted.

FIG. 7 is a graph showing an excitation characteristic of the core 223 of the saturable reactor 3, that is, a so-called BH curve.
In this figure, the horizontal axis is the magnetic field strength (H) along the magnetic path of the core 223, the vertical axis is the magnetic flux density (B), and the horizontal axis is set so that the direction of the current flowing through the main coil 221 is positive. I am doing it. The reset current flowing in the reset coil 222 is a current in the opposite direction to the current of the main coil 221, and the reset magnetic field strength H shown in FIG.
_C is a value obtained by dividing the ampere-turn, which is the product of the number of turns of the reset coil 222 and the reset current value, by the magnetic path length of the core 223, and is set to the position shown in the figure.
That is, the core 223 is reset in the negative direction until the saturation magnetic flux density B _m is reached.

When a current flows through the main coil 221, the magnetic field strength H becomes a positive large value and moves largely to the right in the figure. Therefore, the change in the magnetic flux density during this period is 2B _m . While the magnetic flux density rises from -B _m to B _m , the saturable reactor 22 bears a voltage, the inductance of the saturable reactor 22 is a very large value, and it is a switch-off state in which the current is substantially cut off. When the magnetic flux density B reaches B _m , the inductance of the saturable reactor 22 becomes a small saturation inductance L _S when the core 223 saturates, and the pulse current flows when the switch is turned on. When the current of the main coil 221 becomes zero, the magnetic flux density of the core 223 becomes the reset magnetic field strength H.
_Since it becomes _C , it means that the main coil 221 returns to the state before the current flows, that is, it is reset.

When the reset magnetic field strength is set to the value of H _{1 in} the figure, B and H change along the curve above the hysteresis loop at the time of resetting, so that at the completion of resetting, it stops at point P, and the magnetic flux density at this time is shown in the figure. So -B ₁ . Therefore, the amount of change in the magnetic flux density (= B _m + B ₁ ) can be controlled by adjusting the reset magnetic field strength H _1, and the value of the voltage-time product that the saturable reactor 22 bears can be changed. Therefore, it becomes possible to control the peak value of the output pulse. (JP-A-3
-108386 gazette).

FIG. 8 shows an operation theory of the magnetic pulse compression apparatus of FIG.
FIG. 6 is a waveform diagram for light. In this figure, the horizontal axis is time
(T), the vertical axis represents voltage (V). Voltage V₁, V₂, V
₃Are the voltages at the positions shown in FIG. Also τ₁,
τ₂, Τ₃Is the voltage V ₁, V₂, V₃At the crest length of
is there. At the point before the origin of this figure, the
The voltage of the sensor 11 is V₀Is charged and the switch 12
It is off. The capacitor C₀, C₁, C ₂
It is assumed that the capacitance values of 1 are the same value C.
Under these conditions, the efficiency of the magnetic pulse compressor is the best.
Therefore, it is the most frequently adopted condition. The switch 12 is turned on at time t = 0 (origin) to t = 0. Capacitor
The electric charge accumulated in 11 passes through the inductor 13 and is magnetized.
Flowed into the first stage condenser 21 of the air pulse compressor
Charge this. Therefore, the voltage of the capacitor 21
Voltage V₁Rises over time. Voltage V₁
Is the series capacitance (C /
2) and the inductance L of the inductor 13₀Determined by
It rises based on the resonant frequency and its half-cycle time τ₁so
It will be the highest price. At this point the voltage V ₁Crest length τ₁And
It Also, at this point, the charge of the capacitor 11 is all
And the voltage of the capacitor 11 becomes zero.
ing. Time t₁= Τ₁~ At this point, the core 223 of the saturable reactor 22 saturates
The substantially off state becomes the on state. Lord at this time
The saturation inductance of the coil 221 is L_1SAnd

When the inductance of the inductor 13 is L ₀ , the saturation inductance L _1S is set to L _1S << L ₀ . The electric charge charged in the capacitor 21 is reduced to become a current that returns to the capacitor 11 through the inductor 13 and a current that charges the capacitor 23 through the saturable reactor 22. However, since L _1S << L ₀ as described above, the current passing through the inductor 13 can be substantially ignored, and all the electric charge of the capacitor 21 passes through the main coil 221 of the saturable reactor 22 and the capacitor 23. May be charged. That is, all the charges of the capacitor 21 are transferred to the capacitor 23.

The voltage V ₂ of the capacitor 23 rises based on the resonance frequency determined by the series capacitance (C / 2) of the capacitors 21 and 23 and the inductor L _1S when the main coil 221 is saturated, and the half cycle time thereof. Is τ ₂ , and at the same time is the wavefront length of the voltage V ₂ . Since the capacitance values are the same, τ ₁ and τ ₂ are determined in proportion to the square root of the inductance of each circuit, but since L _1S << L ₀ , τ
₁ ≪ τ ₂ holds. Time _{t 2 = τ 1 + τ 2} ~ core 243 of the saturable reactor 24 at this time is shifted to ON from the saturation substantially off. If the saturation inductance of the main coil 241 at this time is L _2S , L _2S <L
_It is set to _1S .

The electric charge charged in the capacitor 23 passes through the main coil 241 of the saturable reactor 24 to charge a capacitor (not shown) included in the load 4, and the wave front length of the voltage V ₃ applied to the load 4 at that time. τ ₃ is even smaller than τ ₂ . If a current tries to flow in the saturable reactor 22 in the opposite direction during this period, the saturation of the core 243 is released and the voltage is burdened. As a result, the current cannot flow backward, which is a kind of rectifying action.

As described above, the electric charges initially charged in the capacitor 11 sequentially move to the capacitors 21 and 23 and the capacitor included in the load (not shown), and a pulse having a small pulse width is applied to the load 4. Voltage V ₁ ,
Currents corresponding to V ₂ and V ₃ are pulse widths τ ₁ , τ ₂ , τ ₃
Is inversely proportional to. FIG. 9 is a cross-sectional view of the magnetic pulse compression device of FIG. 6, which has a configuration which is axisymmetric with respect to the symmetry axis in the left-right direction of the drawing except for some members. The magnetic pulse compression device 2 of this figure has three capacitors 21, 23, 25 which are also distributed constant lines in the form of coaxial cables, and two saturable reactors 22 and 24 which are respectively sandwiched between these capacitors. It consists of chambers 225 and 245. The saturable reactor 24, including the saturable reactor chamber 245, does not include the reference numerals of the members constituting the saturable reactor chamber 245. It is exactly the same as the saturated reactor 22. Therefore, the description of the saturable reactor 22 also applies to the saturable reactor 24. Further, the capacitor 25 is included in the load 4 in FIG.

The distributed constant line 21 is a high-voltage conductor 211 provided on the inner diameter and a low-voltage conductor 2 provided on the outer diameter side and also serving as a container.
12 and pure water 213 that fills the space between the high-voltage conductor 211 and the low-voltage conductor 212. The pure water 213 is an insulating medium that insulates the high-voltage conductor 211 and the low-voltage conductor 212, a cooling medium that cools them, and at the same time has a function as a dielectric having a high relative dielectric constant. As is well known, since the relative permittivity of water is as high as 80, there is an advantage that the capacitance value between the high voltage conductor 211 and the low voltage conductor 212 of the capacitor 21 can be set to a predetermined value with a small size. Pure water is used instead of normal water in order to ensure insulation strength.

The saturable reactor chamber 225 is filled with insulating oil that serves both as an insulating medium and a cooling medium. Capacitors 21, 23, 25 and saturable reactor chambers 225, 2
45 is mechanically connected to the insulating spacers 201 to 206 by a flange structure and is also partitioned by the insulating spacers 201 to 206. The insulating spacers 201 to 206 include high voltage conductors 211, 231, and 2.
51 penetrates. Low voltage conductor 212 of high voltage conductor 211
The outer diameter dimension of the portion opposed to and the inner diameter dimension of the low-voltage conductor 212 are set in order to secure the required insulation strength and the predetermined distributed capacitance value.
The portion of the high-voltage conductor 211 supported by the insulating spacers 201 and 202 has a structure in which the diameter is reduced in consideration of the mechanical strength of the insulating spacers 201 and 202. The same applies to the other high-voltage conductors 231 and 251.

The saturable reactor 22 comprises a ring-shaped core 223, a main coil 221 wound around the core 223, and a reset coil 222. The reset coil 222 overlaps the main coil 221, so it is not shown, but a part of the lead-out lead and the through bushing 224 are shown. In the figure, the main coil 221 has two turns,
This is a display to show that the core 223 having the cross section is wound, and does not show the actual number of turns. When the number of turns is one, the main coil 221 has a simple shape that penetrates the inner diameter hole of the core 223,
In the case of a plurality of turns, the core 221 is wound so as to be distributed as uniformly as possible in the circumferential direction. This also applies to the reset coil 222 (not shown).

[0017]

Capacitors 11 and 2
The capacitance values of 1, 23, 25 are all set to the same value C. Therefore, the peak values of the voltages of the capacitors are all the same V ₀ as shown in FIG. Further, the saturable reactors 22 and 24 shift from the unsaturated state to the saturated state when the magnetic flux density B in FIG. 7 reaches + B _m , and as described above, when the applied voltage reaches the peak value. Is set to. Therefore, there is a problem that it is not easy to change the peak value of the output pulse voltage V ₃ .

According to the above-mentioned publication, the magnetic flux density B ₁ in the reset state is changed by changing the reset magnetic field strength H ₁ explained in FIG.
There is a description that control is performed such that the voltage-time product until saturation is changed by changing the value of. However, if the current flowing through the saturable reactor may be overshifted to a negative value, the magnetic field strength once goes to the left end in FIG. 7 and returns to the point Q corresponding to the reset magnetic field strength H ₁ . The magnetic flux density of the point Q are close to almost -B _m as shown in FIG. Therefore, there is a problem that such control is impossible under the condition that the load 4 is overshifted.

An object of the present invention is to solve such a problem and to provide a magnetic pulse compression device capable of changing the voltage of an output pulse even in a load in which the current is overshifted.

[0020]

In order to solve the above problems, according to the present invention, a ladder type circuit is formed by at least two or more capacitors connected in parallel and at least two saturable reactors connected in series. In the magnetic pulse compression device in which a pulse is input from one input terminal of this ladder circuit and a pulse with a compressed pulse width is output from the other output terminal of the ladder circuit, It is assumed that the reactor is composed of units independently housed in a container, and these units are detachably electrically connected in cascade. Further, it is assumed that the capacitor unit is a variable capacitor capable of selecting any one of at least two capacitance values. The capacitor unit is made of a cylindrical high-voltage conductor and a low-voltage conductor, and a dielectric that fills the space between the high-voltage conductor and the low-voltage conductor. The high-voltage conductor is made of at least two concentric cylinders. Each shall be independently drawn to the outside. It is also assumed that the saturable reactor unit contains at least two saturable reactors, and at least one terminal of the main coils of these saturable reactors is independently drawn to the outside. Further, it is assumed that the above-mentioned capacitor unit having a variable capacitance and a saturable reactor unit having a variable inductance when saturated are combined.

[0021]

In the construction of the present invention, the magnetic pulse compression apparatus is constructed by the unit in which the capacitor and the saturable reactor are independently housed in the container, and the units are detachably and electrically connected in cascade. , Since each unit can be easily replaced, if you prepare in advance multiple saturable reactor units with different capacitance values and built-in saturable reactors with different specifications,
By combining these, the voltage and pulse width of the output pulse can be changed.

Further, the number of prepared capacitor units can be reduced by configuring the capacitor unit so as to select one of at least two capacitance values. As such a capacitor unit, a plurality of cylindrical high-voltage conductors and low-voltage conductors and a space between them are filled with a dielectric, and the terminals of the high-voltage conductors are independently drawn to the outside.

Further, at least two saturable reactors are built in the saturable reactor unit, and at least one terminal of the main coils of these saturable reactors is independently drawn to the outside so that the drawn terminals are connected. Different saturable reactor specifications can be obtained by varying. By combining a variable capacitance capacitor unit and a variable specification saturable reactor unit, a wider range of different output pulses can be handled.

[0024]

EXAMPLES The present invention will be described below based on examples.
FIG. 1 is a sectional view showing a part of a magnetic pulse compression apparatus showing a first embodiment of the present invention. The magnetic pulse compression device of FIG. 9 is composed of three capacitors 21, 23, 25 and two saturable reactors 22, 24, but in FIG.
Only 5A and saturable reactor unit 24A are shown,
Illustration of the capacitor unit 21A and the saturable reactor unit 22A is omitted. As shown in the figure, each unit is independently formed by being sandwiched between two insulating spacers, and is electrically connected by a connecting fitting.

The capacitor unit 23A is a high voltage conductor 2
31A, low-voltage conductor 232A also serving as a container, low-voltage conductor 23
Two insulating spacers 203R that cover both sides of 2A, 2R
04L, the dielectric 234 that fills the space between the high-voltage conductor 231A and the low-voltage conductor 232A, and the connection fittings 237, 2 on both sides of the dielectric 234 and the high-voltage conductor 231A that are exposed to the outside through the insulating spacers 203R, 204L.
It consists of 38. The connection fitting 237 is a male contact having a convex portion, and the connection fitting 238 is a female contact having a concave portion. Since the saturable reactor unit 24A and the capacitor unit 25A have the same or similar configurations, duplicated description will be omitted. The connection fittings 237 and 238 may be a combination of male and female threads, or may be a so-called turnbuckle in which the connection fitting 237 is a left male screw and the connection fitting 238 is a body that connects these with a right male screw.

The convex portion of the connecting metal fitting 237 is fitted into the concave portion of the connecting metal fitting 228 of the saturable reactor unit 22A (not shown) so that the saturable reactor unit 22A and the capacitor unit 23A are electrically connected to each other. The convex portion of the connecting fitting 247 of the saturable reactor unit 24A is fitted into the concave portion of the connecting fitting 238 to electrically connect the capacitor unit 23A and the saturable reactor unit 24A. The same applies to the connection between the saturable reactor unit 24A and the capacitor unit 25A.

As described above, the capacitors and the saturable reactors that constitute the magnetic pulse compression device are independently configured and electrically connected by the connection fittings, whereby capacitor units having different capacitance values are provided in advance. It is possible to configure a magnetic pulse compressor by preparing multiple saturable reactor units with different specifications and connecting the appropriate combination of capacitor unit and saturable reactor unit according to the set output pulse specifications. .

FIG. 2 is a sectional view of a capacitor unit showing a second embodiment of the present invention, and FIG. 3 is a view on arrow A of FIG. In these figures, the capacitor unit 2 of FIG.
3A is different from the high-voltage conductor 231A and the low-voltage conductor 232A
Another high-voltage conductor 231B is provided between and. Although the high-voltage conductor 231A and the low-voltage conductor 232A in this figure are not exactly the same as those in FIG. 1, they are structurally almost the same and therefore, the same reference numerals are given and detailed description thereof is omitted.
The insulating spacers 203r and 204l are different from the insulating spacers 203R and 204L in FIG.

A high-voltage conductor 231B is concentrically arranged between the high-voltage conductor 231A and the low-voltage conductor 232A. The high-voltage conductor 231A is provided with a connection fitting 51 and a high-voltage conductor 232.
Connection fittings 52 are attached to 31B, and these connection fittings 51 and 52 are provided at four locations dispersed in the circumferential direction as shown in FIG. This is so that the current flows in the circumferential direction as uniformly as possible. Connection fitting 51
And the connection fitting 52 are appropriately connected by the connection fitting 53.

The right side of FIG. 2 shows a state in which the connecting fittings 51 and 52 are connected by the connecting fitting 53, and the left side shows the state in which the connecting fitting 53 is not attached and therefore the connecting fittings 51 and 52 are not connected. In the state where the connection fittings 51, 52 on both sides are not connected as on the left side, the high voltage conductor 231
B is in an electrostatically floating state, and the capacitance value C _a of the capacitor unit 23B is the low voltage conductor 232A.
And a high-voltage conductor 231A, that is, a value that is almost the same as that of the capacitor unit 23A of FIG.

When the connecting fittings 51 and 52 on both sides are connected together by the connecting fitting 53, the high-voltage conductors 231A and 231B have the same potential, so that the capacitance value C _b is the high-voltage conductor 23.
1B and the low-voltage conductor 232A, the distance between the conductors becomes small, and the capacitance value becomes large.
C _b > C _a . Replace the high voltage conductor 231B with the low voltage conductor 232.
The capacitance value C _b increases as the distance between the conductors is reduced by providing it at a position closer to A.

If the other circuit conditions are the same and the capacitance value C of the capacitor unit is increased and the capacitance value of the capacitor 11 of the pulse power supply 1 is also increased accordingly, the wavefront lengths τ ₁ , τ ₂ , τ ₃ are the capacitance values. It increases in proportion to the square root of C. Therefore, the voltage V ₀ can be reduced in inverse proportion to the wave front length by matching the time when the saturable reactor is saturated with the time when the peak value of each voltage is reached. That is, the voltage V ₀ , and hence the voltage V ₃ of the output pulse It becomes possible to change the peak value.

FIG. 4 is a sectional view of a saturable reactor unit showing a third embodiment of the present invention, and FIG. 5 is a view on arrow B of FIG. In these figures, the point different from the saturable reactor unit 24A in FIG. 1 is that two saturable reactors 24J and 24K are housed in a container 245B. Then, the right side insulating spacer 205l has the same metal fitting 54, as the insulating spacers 203r and 204l described above.
55 is provided and can be connected with the connection fitting 56. The connection fitting 54 is connected to the connection fitting 24 by the connection fitting 57.
8 is electrically connected.

The saturable reactor 24 arranged on the outer diameter side
The right end of the main coil 241K of K is connected to the connecting fitting 247, and the left end thereof is connected to the connecting fitting 248. The left end of the main coil 241J of the saturable reactor 24J disposed on the inner diameter side is connected to the connecting fitting 247 similarly to the main coil 241K. The right end is connected to the connection fitting 55. Therefore, the connection fitting 5
When 4 and 55 are connected by the connecting fitting 56, the main coils 241 of the saturable reactors 24J and 24K are connected.
J and 241K are connected in parallel, and when they are not connected, saturable reactor 24J is disconnected from the circuit, and saturable reactor 24K only functions. Therefore, when the saturable inductors of the saturable reactors are L _JS and L _KS , the inductance of the saturable reactor 24K alone is L _KS ,
The total inductance L _s when connected in parallel is L _s = L _JS · L _KS / (L _JS + L _KS ). For example, if L _JS = L _KS , then L _s = L _KS /
2. If L _JS = L _KS / 3, then L _s = L _KS / 4.

In this way, by storing two saturable reactors in one saturable reactor unit and making it possible to change these connections externally,
It is possible to obtain two different inductances with one saturable reactor unit. As a condition that the two saturable reactors 24K and 24J are used in parallel connection, the same point in time when both saturable reactors are saturated,
In other words, they must bear the same voltage-time product. To satisfy this condition, the materials of the core are the same, and the product of the number of turns of the main coils of both saturable reactors and the cross-sectional area of the core is the same. On the other hand, since the saturation inductance is proportional to the product of the square of the number of turns and the cross-sectional area of the core, it is possible to manufacture a saturable reactor having the same voltage-time product but different inductance.

[0036]

As described above, according to the present invention, the capacitor and the saturable reactor are formed as independent units, respectively, and they are detachably electrically connected to each other to form the magnetic pulse compression device. Units can be easily replaced, so if you make capacitor units with different capacitance values and saturable reactor units with different specifications, you can change the output pulse voltage and pulse width by changing the combination of these. The effect that the optimum output pulse can be generated according to the load to which the output pulse is applied is obtained. .

Further, by configuring the capacitor unit so as to select one of at least two capacitance values, it is possible to reduce the number of capacitor units to be prepared, thereby reducing the overall cost and reducing the unit cost. The effect of reducing the storage space can be obtained.
As such a capacitor unit, a plurality of cylindrical high-voltage conductors and low-voltage conductors and between them are filled with a dielectric,
It is possible to employ a structure in which the terminals of each high-voltage conductor are independently drawn to the outside.

Further, by incorporating at least two saturable reactors in the saturable reactor unit so that the connection can be changed externally, the same effect as the capacitor unit having a plurality of capacitance values can be obtained. it can. By combining a variable capacitance capacitor unit and a variable specification saturable reactor unit, a wider range of different output pulses can be handled.

[Brief description of drawings]

FIG. 1 is a sectional view showing a part of a magnetic pulse compression device showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a capacitor unit showing a second embodiment of the present invention.

FIG. 3 is a view on arrow A of FIG.

FIG. 4 is a sectional view of a saturable reactor unit showing a third embodiment of the present invention.

5 is a view on arrow B of FIG.

FIG. 6 is a circuit diagram of a magnetic pulse compression device.

FIG. 7 is a BH characteristic diagram of the core of the saturable reactor of FIG.

8 is an explanatory diagram of the operation of FIG.

FIG. 9 is a sectional view of a conventional magnetic pulse compression device.

[Explanation of symbols]

21, 23, 25 ... Capacitors, 23A, 25A, 23
B: Capacitor unit, 22, 24, 24J, 24K
... saturable reactor, 24A, 24B ... saturable reactor unit, 211, 231A, 231B ... high-voltage conductor,
212, 232A ... Low-voltage conductor, 201, 202, 20
3,203R, 203r, 204,204L, 204
1, 204R, 205, 205L, 205l, 205
R, 206 ... Insulating spacer, 51, 52, 53, 54,
55, 56, 57, 237, 238, 247, 248,
257, 258 ... Connection fitting

Claims (5)

[Claims] 1. A ladder circuit is formed by at least two capacitors connected in parallel and at least two saturable reactors connected in series, and an input terminal which is one terminal of the ladder circuit is formed. In a magnetic pulse compression device in which a pulse is input and a pulse whose pulse width is compressed is output from the output terminal which is the other terminal, a capacitor and a saturable reactor are each configured by a unit separately housed in a container. A magnetic pulse compression device characterized in that the units are detachably electrically connected in cascade. 2. The magnetic pulse compression apparatus according to claim 1, wherein the capacitor unit is a variable capacitor capable of selecting any one of at least two capacitance values. 3. A capacitor unit comprises a cylindrical high-voltage conductor and a low-voltage conductor, and a dielectric material filling between the high-voltage conductor and the low-voltage conductor, and the high-voltage conductor comprises at least two concentric cylinders. 3. The terminals of the above are independently drawn out to the outside.
The magnetic pulse compression device described. 4. The saturable reactor unit contains at least two saturable reactors, and at least one terminal of a main coil of these saturable reactors is independently pulled out to the outside. 1. The magnetic pulse compression device according to 1. 5. A magnetic pulse compression device comprising the capacitor unit according to claim 2 or 3 and the saturable reactor unit according to claim 4 in combination.