SU652742A1 - Electron accelerator - Google Patents

Description

(54) ELECTRON ACCELERATOR

The invention relates to accelerator technology and can be used in the development of high-power electron beam sources with adjustable pulse duration for radiation. physics, flaw detection and generation of microwave radiation.

The electron accelerator is known, which contains a high-voltage pulse generator and a planar diode with a cathode, anode, and a partitioned insulator 1. The pulse width of the electron beam in a known device is varied by changing the distance between the cathode and the anode in a planar diode. However, in the known device, starting from a certain distance, determining for the pulse duration, the process of overlapping the discharge of the partitioned insulator becomes, and the pulse duration ceases to be a controllable quantity.

Also known is an electron accelerator containing a pulse voltage generator, an electron gun with an anode, a cathode and an insulator, and a main and additional solenoids 2. By creating a non-uniform magnetic field in the main solenoid between the cathode and the anode

a change is made in the velocity of the plasma in this gap, which in turn leads to a change in the pulse duration. The same solenoid simultaneously forms the electron beam. In this known device, there is no possibility of controlling the duration of the electron beam at a fixed mode of formation of the electron beam, since the additional solenoid that covers the main one has a large length. As a result, it creates a uniform field that does not affect the pulse duration.

The aim of the invention is to regulate the duration of the electron beam pulse. In the described accelerator, this is achieved by the fact that in it an additional solenoid is installed between the main solenoid and the insulator and connected to a pulsed power source.

The drawing shows the scheme described accelerator.

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Claims (2)

It includes a microsecond high-voltage pulse generator 1, a coaxial cold-emission gun 2 with a cylindrical cathode, a partitioned isolator 3 of an electron gun, a cylindrical drift tube 4, an anode, a main solenoid 5 and an additional solenoid 6, which is installed at the end of the sectioned isolator at the exit of the electron gun. Additional saltwater can be powered from the same power source as the main one. At the moment when the magnetic field on the main solenoid reaches a maximum, a high voltage pulse from the voltage generator is applied to the diode. The electrons emitted from the cathode are formed under the action of electric and magnetic fields in a tubular electron beam and then transported to a drift tube. An additional solenoid impulses a current from the same power source as the main solenoid (with some delay or at the same time). When the additional solenoid is turned on, a non-uniformity (disturbance) of the magnetic field arises. Part of the electrons emitted by the cathode and cathode holder, in this case, hits the partitioned gun isolator and causes the insulator to break down on the surface, thereby forming an electron current pulse. By increasing the magnitude of the disturbance, its magnetic field can shorten the duration of the electron beam and get a steeper slice of its back front. An electron accelerator comprising a pulse voltage generator, an electron gun with an anode, a cathode and an insulator, a main and additional solenoids, characterized in that, in order to control the pulse duration of the electron beam, an additional solenoid is installed between the main solenoid and the insulator and is connected to a pulsed power source. Sources of information taken into account in the examination 1. Martin Clark. Pulse accelerator of high-energy electron beam of microsecond duration. “Instruments for scientific research. 1976, No. 4, p. 59-63. 2. Royfe, IM, Stekolnikov, B.A. and Engelko, V.I., Obtaining and Investigating a High-Current Microsecond Electron Beam. “Journal of Technical Physics, 1976, Vol. 46, no. 12, p. 25632576.