SU307539A1 - Neutron pulse generator - Google Patents

Abstract

1, NEUTRON PULSE GENERATOR containing a neutron tube, a storage capacitor, a high-voltage pulsed transformer and a pulse generator for igniting an ion source of a neutron tube, in order to increase the frequency of the generator and increase the neutron flux density in the pulse shaper circuit under The ion source of the neutron tube contains a delay line, and a capacitor is connected in parallel with the ion source of the neutron tube, and an element is introduced into the discharge circuit, limiting the duration of burning equestrian source ". 2o The generator according to claim 1, t, l, is that the storage capacitor is connected by one plate to the primary winding of a high-voltage pulse transformer, and the other to the anode of a switching element, for example, a tiratron. ≪ /}

Description

The invention relates to a physical instrument making and is intended for conducting research on propagation and retarding media, activation analysis of the elemental composition of a substance, etc.

Neutron pulse generators represent one of the types of radiation sources.

The purpose of the invention is to improve the efficiency of the neutron tube and the frequency of the generator.

Figure 1 is a schematic diagram of the proposed neutron pulse generator; 2, the time and voltage plots of the currents and voltages in the generator.

pulsed transformer 3, storage capacitor 4, switching element 5 (for example, a thyratron), capacitor 6, an ion source with a cathode 7, an anode 8 and a firing electrode 9, element: 10, limiting the duration of burning of an ion source, for example, a resistor. an impulse to ignite the ion source of the neutrous tube, which includes the condensation aor 11 and the pulse transformer T2, and the delay line 13.

From the high voltage source 14, capacitors 4, 6, 11 are charged to a voltage of 2-10 kV. From the control unit 15, a control pulse 1-6 is applied to the grid of the thyratron 5 (Fig. 2) and puts the thyratron into a conducting state. Capacitor A is discharged through the thyratron 5 and the primary winding of the transformer 3; at the same time, a negative voltage polarity 17 with an amplitude of 100-150 kV and a neutron tube 1 applied to the target 2 is formed on the secondary winding. After a time interval tz / ld determined by the delay line 13, the pulse 18 and voltage from the transformer 12 goes to the firing the electrode 9 of the ion source and transfers the ion source to the conductive state. As a result, the capacitor 6 is discharged through the ion source (current pulse 19) and in the electrical arc between the anode 8 and the cathode 7 of the ion source forms deuterium ions orye are accelerated and bombard the target 14, which are formed neutrons (pulse 20) as a result of nuclear reaction. After the restoration of the electrical strength of the ION source and the switching element, the process can be repeated. Due to the delay of the ion source, the main part of the produced deuterium ions enters the accelerating gap of the tube at the moment of maximum magnitude of the accelerating voltage, which significantly increases the efficiency of the neutron tube. The inclusion in the circuit of the discharge of the capacitor 6 of the element 10 limits the duration of the ionia source gyrey, thereby reducing gas emission from the ion source and its heating; This makes it possible to increase the frequency of operation of the neutron tube. The described design of the neutron pulse generator allows to increase the frequency of operation to 100 Hz and to bring the neutron flux density to 1-10.

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Claims (2)

1 "NEUTRAL PULSE GENERATOR, comprising a neutron tube, a storage capacitor, a high-voltage shunt transformer and a pulse generator for igniting an ion source of a neutron tube, characterized in that, in order to increase the frequency of the generator and increase the density of the neutron flux, in a pulse generator circuit for igniting an ion source of a neutron the tube contains a delay line, and a capacitor is connected in parallel with the ion source of the neutron tube, into the discharge circuit of which an element is introduced, limiting duration ^{: the} burning of an ion source. •. 2 o The generator according to claim 1, characterized in that the storage capacitor is connected to the primary winding of a high-voltage pulse transformer, and OTHER to the anode of a switching element, for example, a thyratron.