SU340360A1 - PULSE SUPPLY SYSTEM OF ELECTRON SOURCE - Google Patents

Description

This invention relates to accelerator technology. The known system of patching a pulsed electron source, containing an impulse transformer, a charging circuit, a tip, a value for removing excess charge from a storage device, a circuit for discharging a storage device to a pulse transformer, does not provide energy stability in different modes of repetition frequency particles. The proposed system ensures the invariance of the electron energy in acceleration pulses. For this, the tracking device is connected to the high-voltage output of the storage device, the output of the tracking device is connected to the input of the generator of shifted impulses, the outputs of which are connected to the nets of thyratrons in the discharge circuits of the storage device. FIG. 1 and 2 are schematic diagrams of the implementation of the proposed device. The impulse impedance system of the electron source consists of a high voltage source (P1ka / power supply), throttles 2 resonant charges, a charge bottom 3, and a storage (forming line) 4 connected in series. Capacitor 5 is turned on at the source output /, resistance 6 is connected in parallel to diode 3 and choke 2, thyratrons 7 and 8 are connected to the opposite ends of the high-voltage} 1 st part) of the drive 4. Ballast load 9 is connected to the cathode value of the tirathrone 7 and connected to the shield: wire circuit. The impulse transformer 10 along the primary winding is included in the cathode circuit of the thyratron 8. and along the secondary winding - to the source of 11 electrons. The next device 12 connects to the high-voltage input of the accumulator 4, and its output is connected to the input of the generator 13 shifted pulses. The outputs of the generator 13 are connected to nets of thyratrons 7 and 8. In the system diagram of an impulse power supply of an electron source with a stable energy of particles and a stable average particle current (fng. 2), the output of the tracking device 12 is also connected to the input of the time converter 14 intervals in the voltage, the output of which is fed to the input of block 13, designed to receive the signal, regulating the interval between the shifted meters of pulses. The next device 12 is a high-voltage divider (voltage) 1; 1, connected to the Schmidt trigger, the output of which includes a differentiating chain and an amplifier. The generator of 13 shifted pulses is,, wait} 1Й. A multivibrator on pentodes with adjustable pulse duration along the screen circuit, -la

the output of which includes a differentiating chain and two terminal amplifiers.

The 14 time-to-voltage converter is a circuit consisting, for example, of, a series of standard elements, such as multiplier-splitters, time-interval meters connected in any way sufficient for a pulse-to-pulse time interval. next device 12 solve the problem

t / lt Ya.,. . , - about

where K is a. constant,

  - the required duration of the electron source pulse in the impending trigger.

Go is the reference pulse length for a given average current of the electron source,

T - the measured value of the period of operation of the scheme. Go - set the average value of the period

work scheme.

The system of pulsed litany of the electron source operates as follows.

The accumulator 4 is charged in a resonant way from the power source / through the choke 2 and diode 3 to a voltage twice that of the capacitor 5. This voltage is slightly greater than that required for the heating of electrons with a given energy. At the end of the charge, through the resistance 6 from the accumulator 4 to the capacitor 5, the current begins to flow, as a result of which the voltage on the loop drive 4 gradually decreases. At the moment when the preset Zrovn is reached, the Schmidt trigger in the tracking device 12 is tilted, and a signal appears at the output of the tracking device 12. The interval between the signals of block 12 is measured in block 14, compared with a standard value of 7 °, multiplied by the standard value of the duration of the electron pulse 0, and fed to the output as a constant voltage. The waiting Multivibrator in block 13 is triggered by the pulse of block 12, and the duration of the multivibrator impulse is determined by the voltage received from the output of block 14 to the multivibrator circuit. The leading and trailing edges of the pulse of the multivibrator are used to form pulses shifted from time to the nets of thyratrons 7 and 8. The thyratrons 7 and 5 are alternately ignited and the source of electrons is supplied with high-voltage impulse voltage of a given amplitude and duration.

When the output voltage fluctuates

power supply the tracking device 12 varies the switching period of the electron source 11, while maintaining a stable amplitude of the electron supplying the source impulses, the converter 14 time

The intervals regulate the duration of “м pulses of charged particles, while keeping stable. The average current of the source of charged particles. Adjustment of the trigger Sch.midt in block 12 allows changing the predetermined average value of the period. The adjustment in the / 4 block allows you to change the specified average value of the duration of the impulse.

Subject invention

1. A pulsed power supply system for an electron source, containing a pulsed transformer, charge center, accumulator, a circuit for removing excess charge from a storage device, a circuit for discharging a storage device to a pulse transformer, In order to stabilize the electron energy, the following device is connected to the high-voltage output of the storage device, the output of the tracking device is connected to the input of the generator of the shifted electrons, the outputs of which are connected to the nets of thyratrons in the discharge;

2. System on. 1, characterized in that the output of the tracking device is connected to the input of the time interval to voltage converter, the output of which is connected to the auxiliary input of the generator of shifted pulses.