Purpose. For cleaning vacuum surfaces with plasma of high-frequency discharges (HF) of various frequency ranges in combination with a direct current discharge, which will have high efficiency and a low level of physical dispersion of installation elements in the vacuum chamber.
Specifications. A technology has been developed that allows cleaning the walls of a vacuum chamber with a combined discharge rather than a Jewish discharge. The developed technology of zhevry-microwave plasma discharge for cleaning the internal surfaces of vacuum chambers of controlled thermonuclear fusion installations with magnetic plasma content has significant advantages and will be implemented in large tokamaks and tellators and a thermonuclear reactor.
Application area. Reactor technology.
Advantages. The developed advanced technology for cleaning the internal surfaces of the vacuum chamber of controlled thermonuclear fusion installations based on a combined discharge (zhevry-microwave plasma discharge), in contrast to the zhevry discharge, makes it possible to reduce sputtering of the internal equipment in the vacuum chamber and its walls. At the same time, it has a fairly high efficiency in cleaning vacuum surfaces with plasma, which reduces the time it takes to prepare the installation for operation.
Technical and economic effect. The developed technology for cleaning the walls of a vacuum chamber with a combined discharge makes it possible to reduce the time required to prepare the installation for operation. This will save energy costs and wages.
Description. The technology for cleaning vacuum surfaces with plasma of high-frequency discharges (HF) of different frequency ranges in combination with a direct current discharge has demonstrated the feasibility of cleaning walls in large experimental machines such as Tokamak and Stellator and in ITER and DEMO, which should be effective and fast. The developed technology of Zhevry-microwave plasma discharge for cleaning the internal surfaces of vacuum chambers of controlled thermonuclear fusion installations with magnetic plasma content has significant advantages and was introduced with subsequent improvement at Uragan-2M. Zhevriy and microwave (ZhM) discharge systems were developed, manufactured and installed on Uragan-2M. Testing of these systems gave good results. The first experiments with an LM discharge were carried out, which made it possible to find the conditions under which the anode voltage of the LM discharge is significantly reduced.