Method for charging of a superconducting-switch-free superconductively closed circuit (10; 10'; 10"; 10′′′; 10"") with ∘ at least one superconducting sub-circuit (4; 4') with a closed superconducting path, at least one sub-circuit (4; 4') comprising an entry connection area for feeding current into the sub-circuit (4; 4') and an exit connection area for feeding current out of the sub-circuit (4; 4'), wherein the connection areas (6a, 6b) divide the corresponding sub-circuit (4; 4') into a first branch and at least a second branch, the first branch having a first inductance L1 and a first critical current Ic1 and the second branch having a second inductance L2 and a second critical current Ic2, wherein the first inductance L1 of the first branch is lower than the second inductance L2 of the second branch, ∘ currents leads (3; 3') for connecting the circuit to a power supply (12, 12'), wherein the method comprises • Electrically connecting one entry connection area and one exit connection area of the circuit to the power supply via the current leads (3; 3'), • Modifying an initial current I0 (I0≥0) within the superconducting circuit (10; 10'; 10"; 10′′′; 10ʺʺ) by feeding a supply current Iin into the circuit (10; 10'; 10"; 10′′′; 10ʺʺ) with the following steps: (a) Increasing the supply current Iin until a first partial current, which passes through one of the two branches (1, 2), reaches the critical current of that branch, (b) Further increasing the supply current Iin to Δa resulting in a second partial current, which passes into the other branch, wherein Δa is the current fed into the circuit by the current supply, (c) Reducing the supply current Iin to 0A, resulting in a remanent circuit current Icircuit within the circuit (10; 10'; 10"; 10′′′; 10ʺʺ), characterized in that for charging the circuit (10; 10'; 10"; 10′′′; 10ʺʺ) (Icircuit>I0), in step (b) the supply current Iin is increased to Δa, wherein: Δ a / Ic1 > 0 if h ∗ k < 1: k + 1 < Δ a / Ic 1 ≤ h + 1 / h if h ∗ k > 1: k + 1 / h ∗ k < Δ a / Ic 1 ≤ h + 1 / h with 0 < k = L 1 / L 2 < 1 and h = Ic 1 / Ic 2 > 0 and h ∗ k ≠ 1 ∘ at least one superconducting sub-circuit (4; 4') with a closed superconducting path, at least one sub-circuit (4; 4') comprising an entry connection area for feeding current into the sub-circuit (4; 4') and an exit connection area for feeding current out of the sub-circuit (4; 4'), wherein the connection areas (6a, 6b) divide the corresponding sub-circuit (4; 4') into a first branch and at least a second branch, the first branch having a first inductance L1 and a first critical current Ic1 and the second branch having a second inductance L2 and a second critical current Ic2, wherein the first inductance L1 of the first branch is lower than the second inductance L2 of the second branch, ∘ currents leads (3; 3') for connecting the circuit to a power supply (12, 12'), • Electrically connecting one entry connection area and one exit connection area of the circuit to the power supply via the current leads (3; 3'), • Modifying an initial current I0 (I0≥0) within the superconducting circuit (10; 10'; 10"; 10′′′; 10ʺʺ) by feeding a supply current Iin into the circuit (10; 10'; 10"; 10′′′; 10ʺʺ) with the following steps: (a) Increasing the supply current Iin until a first partial current, which passes through one of the two branches (1, 2), reaches the critical current of that branch, (b) Further increasing the supply current Iin to Δa resulting in a second partial current, which passes into the other branch, wherein Δa is the current fed into the circuit by the current supply, (c) Reducing the supply current Iin to 0A, resulting in a remanent circuit current Icircuit within the circuit (10; 10'; 10"; 10′′′; 10ʺʺ), (a) Increasing the supply current Iin until a first partial current, which passes through one of the two branches (1, 2), reaches the critical current of that branch, (b) Further increasing the supply current Iin to Δa resulting in a second partial current, which passes into the other branch, wherein Δa is the current fed into the circuit by the current supply, (c) Reducing the supply current Iin to 0A, resulting in a remanent circuit current Icircuit within the circuit (10; 10'; 10"; 10′′′; 10ʺʺ),