to use permanent magnets with nickel holding molten rare earth metals with ndfeb composition and magnetic induction from 600 800 gs or molten rare earth magnets with smco composition with the same magnetic induction according to embodiment of the device it is possible to use only one cylindrical shaped multypole magnet with even number of poles with ratio between the outer and inner diameter in ranger of 1 1 2 to 1 1 5 the elements are filled with porous material and are made of ceramic mixture with binding and foaming substances the relative density of the ceramic element with porous structure can be in the range of 1 8 to 2 2 g cm 3 while the total surface of the capillary is in the range of 35 to 50 m 2 g the ceramic element is saturated with silver particles with size 10 100 nm to restoring of silver compounds in another embodiment of the invention active coal formed as tablets is used as a silver carrier with full surface of the capillary from 80 to 120 m 2 g the generator is realized as controllable generator with independent excitation the base of the generator 1 fig3 is integrated circuit is 1 containing relaxation rc generator logical elements an driver for controlling the mosfet transistor the frequency of the generator is determined by the values of.