SU409647A1 - Rectangular pulse generator to power a linear accelerator - Google Patents

Description

one

The invention relates to a pulse technique.

A rectangular pulse generator for imitating a linear accelerator is known, comprising a power source, a charging circuit, a drive, a load, a triode switched on on the day of the drive, a synchronizer and a solver, to the inputs of which the triode anode and synchronizer are connected.

In order to obtain pulses of constant amplitude with a flat top and variable duration in the proposed generator, the output of the decision device is connected to the control electrode of the triode.

FIG. 1 shows one of the variants of the proposed generator; in fig. 2 - diagrams of fields, which reduce the work of the generator.

The generator contains a power source, charge resistance 2, accumulator 3, load 4, triode 5, voltage sensor 6 at the triode anode, a resolver 7, a synchronizer 8.

The resolver 7 consists, for example, of a series of standard elements, such as differential amplifiers of direct current, logarithmic amplifiers, divisional multipliers, time interval meters, a sensor for the beginning and end of the drive’s discharge, connected in any way sufficient to in the time interval from the beginning to the end of the discharge of the accumulator to the load solve the problem

one

Ri (t)

-Kp,

/ In

; i A

with with Un

where R; (t) is the required internal resistance of the triode 5 at the given time; / - the time elapsed from the beginning of the different razakokptel 5 on

on load yes ku 4;

С - capacity of accumulator 5; / o - given current of the accumulator;

and „- the initial voltage, i.e., the voltage at the anode of the transducer 5 by the time of the switching of the accumulator 5 and the load 4;

 - load resistance 4. The generator of rectangular pulses works as follows.

The drive 3 is charged through a resistance 2 from a power source. From the synchronizer 8 to the input of the decisive device 7 serves a clock pulse. 2, a). Triode 5 is up to this point in the closed state. The resolver 7 reads the indications from sensor 6 and changes the potential of the grids of triode 5 so that through it it begins to pass a discharge current of accumulator 3 to a load 4 equal to the specified value / o. Over time, the resolver 7 changes the potential of the grid of triode 5 so that the discharge current of accumulator 3 continues to be equal to a given value of / o. Under these conditions, the voltage across the anode of ttude 5 decreases stepwise (Fig. 2, b), and load 4 is formed. The leading edge of the pulse. Then the voltage on the anode of the triode 5 decreases linearly, the voltage on the load 4 remains constant. After the end of the synchronizer switch 8, the decisive device 7 closes the triode 5. The rise of the anode of the triode 5 abruptly increases, and the rear edge of the pulse is formed on the load 4 (Fig. 2c). In the gap between the sync pulses, accumulator 3 is again charged through the resistance; rc 2 from the source /.

When. The occurrence of the next clock pulse from the synchronizer 8 at the input of the decisive device 7, it again turns off; A pin 6 and, according to new initial conditions, sets the voltage on the control grid of triode 5 so that the discharge current of the storage ring is again equal to the value of / o. When the pulse period changes, when the pulse duration changes and the voltage changes, to which drive 3 is charged before the next sync pulse arrives, the amplitude of the pulses at load 4 and the shape of the pulse and pulses remain unchanged.

The resolver 7, by a signal from the synchronizer 8, registers the initial conditions by reading the readings from the sensor. 6, marks the moment of the beginning of the discharge, counts the accumulator discharge time, takes into account the value of the storage capacitor and the value of the specified discharge current of the accumulator / o. As a result, the device 7 continuously determines the necessary value of the first term in the above formula. By subtracting the known co-load R ,, loads from the obtained value, the resolver determines the value of the required internal triode 5 for each time point in the interval from the beginning to the end of the synchronization pulse. The obtained value of Ri (t) is converted into a voltage, which enters the output of the resolver 7.

Predmemt and z obreteni

A square pulse generator for powering a linear accelerator containing a power source, a charge, and one circuit, a drive, a load, a triode included in the discharge circuit

Auxiliary, synchronizer and solver, the inputs of which are connected to a voltage sensor at the anode of the triode and a synchronizer, characterized in that, in order to receive; pulses of constant amplitude with a nano tip and variable duration, the output of the solver is connected to the control electrode triode.