RU1116969C - Ion accelerator for laser pumping - Google Patents

Description

laid along the generatrices of the anode cylinder, and the inner cathode, made in the form of a cylinder With slit-shaped slots opposite the dielectric sections of the anode, and a current source connected to the ends of the cathode, the double forming line is located outside the ion gun, coaxial with it, and the anode of the ion gun is aligned with the inner electrode of the double forming line, the outer electrode of which is combined with the accelerator body.

The switch of the double forming line is made circular and is switched on by the middle and internal electrodes of the line at an equal distance from its ends, one end of the cathode of the ion gun is fixed to the device body, and the other is connected to a current source.

The inner electrode of the forming line is mechanically captured at the ends of the accelerator body with the help of sealing insulators.

The drawing shows a diagram of the device. The ion accelerator consists of a charging device 1. of a double coaxial forming line having external 2, middle 3 and internal A electrodes, reactor 5, ring commutator 6 and a coaxial ion gun located inside the accelerator on its axis. The charging device 1 is connected to the middle 3 electrode of the forming line, the inner 4 electrode is connected by the reactor 5 to the bulk electrode 2 of the forming line, and the switch 6 is installed between the middle and inner electrodes. The ion gun is formed by the inner surface of the inner electrode 4 of the double forming line having dielectric regions 7 on its surface and a cylindrical cathode 8 having slots 9 opposite the dielectric sections 7 ne of the inner electrode surface. The cylindrical cathode 8 is connected at one end to the outer electrode 2 of the forming line. The pulsed current source 10 is connected by one pole to the outer electrode 2 of the forming line, and the other pole to the cylindrical cathode 8.

Active medium 11 is placed on the axis of the ionic deposition. Insulators 12 are used to separate the ion cannon and the double forming line if they are used in the last liquid dielectric (oil, water).

The ion accelerator works as follows. When triggered by a pulsed current source 10 through a cylindrical cathode 8 and the outer electrode 2 flows

current, which creates an insulating azimuthal magnetic field in the accelerator volume. From the charging device 1, when it is triggered, a double forming line is charged. The line formed by the middle 3 and outer 2 electrode is charged directly, and the line between the middle 3 electrode and inner 4 electrode is charged through a reactor 5 connecting

inner and outer electrodes of the forming line, at the moment of reaching the maximum of the insulating magnetic field and the charging voltage on the double forming line,

ring switch b, located in this case between the middle and inner electrodes of the forming line at an equal distance from their end parts. From the triggered discharge between the average and

with the internal electrodes, two discharge waves begin to propagate towards their ends. As a result of the processes of refraction and reflection of these waves, two voltage waves simultaneously arrive at the coaxial ionic forest from both ends. Pulses of positive polarity propagating between the cathode and and the inner surface: inner 4 electrodes (which is

in this case, the anode of the ion gun) causes a surface breakdown of the dielectric sections 7, and a dense plasma is generated on the surface of these dielectric sections. Ions of this plasma, acceleration -;

being inserted in the anode-cathode gap, passes through the slots 9 in the cathode. There is no magnetic field inside the cathode, which effectively neutralizes the converging ion beam by cold electrons, which are drawn from the walls of the slots in the cathode 8 by the electric field of the ion beam. Since ions emigrate from the same magnetic surface, they will have different axial components

velocity, which leads to ballistic focusing of the beam on the axis and the formation of a linear and narrow focusing region of OonbUJOM ions. With this design, the ion accelerator is eliminated

inductive transition between the high-voltage generator and the ion cannon, which makes it possible to implement the traveling wave mode and increase the efficiency of transferring the energy stored in the DFL to the laser energy

radiation.

In the proposed accelerator, the ion gun is located inside on its longitudinal axis, and in comparison with the base object, the overall dimensions of the ion accelerator are reduced to the size of the forming

the lines and are determined by the length and diameter of eie. The metal consumption and weight of the accelerator are reduced, since the inner electrode of the forming line is simultaneously the anode of the ion gun and the massive body of the ion gun is eliminated.

In the case of using vacuum insulation between the electrodes of the forming line, the current generator creates magnetic insulation in the anode-cathode gap, which is necessary for the normal operation of the ion gun, and at the same time creates magnetic isolation in the gaps between the electrodes

forming line. In this case, with the same length and the same stored energy in the forming line, the proposed ion accelerator can have a significantly smaller body diameter and weight compared to the base object due to the higher electric field strengths in the forming line.

The implementation of the proposed ion accelerator will provide an economical, compact and powerful source for pumping short-wave lasers.