SU775803A1 - Three-electrode discharger - Google Patents

Description

The invention relates to high-voltage impulse technology, namely, devices for generating high-power pulses, and can be used in high-current nanosecond accelerators. A three-electrode gland is known, consisting of two main electrodes and an igniting one, made in the form of a disk, dispersed in the discharge gap near one of the main electrodes and insulated from it by a solid dielectric l. The stability of such a trigger is small. The closest to the proposed IZ; The known technical solutions are a thermoelectric discharge containing two BASIC electrodes and a podzhi.gadiad electrode, which is under a floating potential, the capacitance between which and one of the BASIC electrodes are larger than the capacitance between the ignition and the second BASIC electrodes 2. The insulating body produces from two CI.PINDROVs with different dielectric constants. Two BASIC electrodes, ignition and cylinders with different dielectric constants form a capacitive voltage divider, which is used to set the potential at the ignition electrode. However, since the interface between a solid dielectric and the working medium of the gage has a low dielectric strength, the size of the glitter is large, so it has significant inductance and does not allow to generate pulses with a short front. The purpose of the invention is to reduce the duration of the front of the formed pulse. This is achieved by the fact that in the proposed three-electrode discharge the igniting electrode is made in the form of a disk with sharp edges and a cylindrical liner connected coaxially with a conductive rod, the first main electrode is made In the form of a hollow cylinder inside which the cylindrical contribution of the ignition electrode is installed; in the gap between the main electrodes. As a result, virtually all of the capacitance voltage capacitor, which sets the potential at the ignition electrode, is located inside one of the Main electrodes. This makes it possible to reduce the dimensions of the compressor, which, together with the implementation of the multichannel mode, leads to a decrease in the duration of the front of the formed pulse.

The drawing shows the proposed three-electrode discharge.

The discharge consists of a housing 1, two main electrodes 2 and 3 and a firing electrode, which consists of a disk 4 with sharp edges and a rod 5 of a cylindrical liner b connected to it, which is installed in isolation inside the hollow Main electrode 3. As a working medium in the discharge water is used with a resistivity of 10 ohm-cm.

The operation of the discharge unit is carried out as follows.

At the front of a high voltage pulse applied between the main electrodes, the voltage between the electrodes 2, 3 and 4 is divided in such a way that most of the voltage is applied by the high voltage 2 and ignition electrodes. The division ratio of the voltage is determined by the ratio of the capacitance between the electrodes 2 and 4 and the capacitance formed by the main elec- trode .3 and the metal insert b of the ignition electrode. The gap between the electrodes 2.4 breaks through, and the entire voltage is applied to the gap between the electrodes 3.4, which leads to its breakdown with large overvoltage and with a small delay, and in this gap the switching will go, as a rule, through several channels. And this, together with the small dimensions of the arrester, leads to a decrease in the duration of the front of the generated pulse. For example, with a lump, no. / Tiruemo- /: a current of 50 kA, the duration of the front

the generated pulse is equal to 9; at the same time, the stability of operation of the device and prototype turned out to be approximately equal.

Thus, the proposed gammer, having a firing stability not inferior to the firing stability of the prototype, allows generating pulses with a front 1.5 times shorter than the prototype. It is worth noting the promise of using such dischargers in high-power nanosecond pulse generators that do not require particularly tight synchronization with other devices.

Formula

zoobeteni

A three-electrode discharge containing two main electrodes installed in a housing and a firing electrode located under a floating potential, the capacitance between which and one of the main electrodes is greater than the capacitance between the leading and the second main electrodes, in order to decrease the duration of the front iguls formed, the ignition electrode is made in the form of a coaxially arranged, connected by a conductive rod of the disk with a sharp edge and a cylindrical liner, the first main electroshock Flax in the form of a hollow cylinder, inside of which is isolated a cylindrical liner of the igniter electrode, whose disk is located in the gap between the main electrodes.

Sources of information taken into account in the examination

1. US Patent No. 2828436, cl. 313-185,1968.

2.Avtorsv: the first Soviet Union P 329613, CL „H 01 T 3/00, 1970.

Claims (3)

SUMMARY OF THE INVENTION A three-electrode spark gap containing 20 main electrodes installed in a housing and an ignition electrode located at a floating potential, the capacitance between which and one of the main electrodes is larger than the capacitance between the energizing and the second main electrodes, characterized in that, in order to reduce the duration of the front of the generated pulse, the ignition electrode is made in the form of coaxially arranged, connected by a conductive rod of the disk with sharp edges and a cylindrical insert, the first main second electrode is formed as a canopy cylinder inside koto, ί.ϊ cerned in isolation a cylindrical liner ignitor whose drive is located in the gap giezhdu main electrodes. 4Q Sources of information taken into account in the examination 1. US patent 28284 36, CL. 313-185, 1968. 2. USSR copyright certificate ₽ 329613, cl. H 01 T 3/00, 1970. 2 3 s' S