[en] In recent years, double liners have gained widespread application in inertial confinement fusion. When the outer shell, accelerated by a high current, collides with the inner liner, the conditions for irradiating nuclear-fusion targets can be created in the inner cavity of the latter (the so-called dynamic hohlraum). In this situation, the question of whether the azimuthal magnetic flux can penetrate the outer-liner plasma before the liners collide is of great importance. In experiments described in this study, the penetration of the magnetic flux into the gap between the liners during the implosion of the outer shell was recorded by the presence of the current in a cylindrical shunt mounted in place of the inner liner. The theoretical concept of a double liner is verified experimentally: it is shown that the magnetic flux does not penetrate into the inner region before the collision. Experiments were carried out in the Angara-5-1 facility