SU396747A1 - SOURCE OF ATOMARY HYDROGEN - Google Patents

Description

one

The invention can be used in quantum hydrogen generators.

Sources of atomic hydrogen are known, which are a glass chamber into which molecular hydrogen enters. A high-frequency generator creates a discharge in the chamber, as a result of which hydrogen molecules dissociate into atoms. The resulting atomic hydrogen escapes from the collimator, which serves to form a beam with a sharp radiation pattern. In order to increase the efficiency of dissociation of molecules, a constant magnetic field created by a special coil with a current or a permanent magnet is applied to the discharge chamber perpendicular to the electric high-frequency field. The maximum dissociation efficiency is observed at a magnetic field strength of about 300 Oe.

When a constant magnetic field is applied to the discharge region, two phenomena arise: a decrease in the diffusion of electrons on the walls of the vessel and cyclotron resonance. The first phenomenon leads to an increase in the concentration of electrons and, consequently, to an increase in the efficiency of dissociation of molecules. The conditions of occurrence of the discharge are also facilitated. Cyclotron resonance relieves the discharge conditions in

areas of resonance and the deterioration of these conditions when applying fields that are far from resonance.

The magnetic field strength, at which a minimum is observed on the dependence of the electric field of the sample on the magnitude of the magnetic field, depends on the frequency of the electric field causing the discharge. At commonly used frequencies (no more than

200 / Igts) minimum occurs at a magnetic field strength of not more than 75 Oe. The optimal conditions for maximum dissociation efficiency and sample conditions do not match.

In an atomic hydrogen source, in which a permanent magnetic field is created by a coil with a current, to create a magnetic field of about 300 Oe, it is necessary to expend more power (about

20 volts) This can be avoided if the magnetic field is created by a permanent magnet, however, this causes deterioration of the conditions for the occurrence of the discharge and requires an increase in. including the power consumption consumed from the generator.

The purpose of the inventive - a decrease in. including the power consumed by the source, and facilitating the condition of ignition of the discharge in the source chamber. In the proposed atomic hydrogen source, this goal is achieved by adding an additional coil to it, which creates an alternating magnetic field, through which an alternating current of low frequency, for example 50 Hz, is passed through the switch for the discharge time (1-2 min}). is schematically shown in Fig. 1; Fig. 2 shows graphs of the power W of the hydrogen generator as a function of the magnitude of the magnetic field at the source (curve a) and the dependence of the electric field breakdown E „p on the strength I of the magnetic field ( b). The proposed source contains a discharge chamber /, including generator 2, collimator 3, permanent magnet 4, current coil 5. The source works as follows. After supplying molecular hydrogen to the discharge chamber and turning it on. The oscillator 5 is connected to the mains using, for example, a button.The alternating magnetic field formed in the coil is combined with the field of the permanent magnet as it passes through the cyclotron resonance point (the minimum in FIG. 2) causes a breakdown of hydrogen, after which the coil 5 is disconnected from the network. The subject of the invention is an atomic hydrogen source containing a discharge chamber, a magnetic system, a high-frequency generator and a collimator, characterized in that, in order to increase the efficiency of the source and to facilitate the discharge ignition conditions in the chamber, the magnetic system is made in the form of a permanent magnet wound around it coil connected to a source of alternating voltage through a switch.

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