Abstract
The paper presents the results of theoretical study the mechanism of Magnetic Compression Lines (MCL) operationin the multi-gigawatt power range. It has been found that the MCL regime is realized under the condition when the precession period of the magnetic moment is less than T0, where T0is twice the propagation time of an electromagnetic wave between the inner and outer conductors of the line. The studies have shown that the input pulse amplification in power has its maximum value when an input pulse width is around of 4T0. While moving along the MCL, the input pulse splits in two peaks and then the energy is redistributed in favor of the first peak. This effect is due to the fact that several periods of precession are located within the first and second peaks, and their number and frequency change during the movement.