during the field cooling process, misaligned Abrikosov vortices are randomly trapped over the junction area (see Fig.1). Eq.(9) describes the dependence of I max c both on the vortex density n$_{A}$ and on the misalignment length δ in case of a circular junction. Taking L to be the radius of a circular junction with an area equal 50 × 50 µm $^{2}$, we used Eq.(9) and Eq.(12) in order to extract the value of δ for each value of vortex density. The average value of misalignment parameter over the all vortex densities is δ = 0 . 8 ± 0 . 1 µm . We observed that the presence of trapped Abrikosov vortices leads to a great deviation of the I (1) F ( B$_{‖}$ ) curves from the ”vortex- free” one shown in Fig. 4 by open circles. These curves are shown in Fig. 6. The presence of trapped vortices did not lead to the variation of the voltage positions of Fiske resonance. This result indicates that the trapped Abrikosov vortices did not change the geometrical conditions for appearance of the first Fiske step and only influenced on the magnitude of I F 1 c by additional spatial variation of the Josephson phase difference ϕ ( ⃗ ρ, t ). Next, we notice that a non-zero amplitude of the first Fiske step at B$_{‖}$ = 0 appeared as Abrikosov vortices were trapped. However, by tuning the parallel magnetic field we could substantially increase the amplitude of the Fiske step. Using the same procedure which was used to obtain the I max c from the I$_{c}$ ( B$_{‖}$ ) curves (see subsection VI C ), we found the maximum amplitude of the first Fiske step I (1) ,max F for each value of B$_{⊥}$ . The experimental dependence of I (1) ,max F on the Abrikosov vortex density n$_{A}$ is shown in Fig. 7 (open circles). In contrast to the I max c ( n$_{A}$ ) dependence, the weak nonmonotonic decrease of the magnitude of I (1) ,max F with n$_{A}$ was observed. Such behavior of the I F 1 ,max c ( n$_{A}$ ) dependence indicates that the condition of σ ≥ σ ∗ should be applied for our sample. Indeed, this conclusion is confirmed by estimating the values of both σ and σ ∗ for our junction. In order to estimate the critical value of σ $^{∗}$, we have to obtain the dissipation parameter γ . This parameter determines the decay of the electromagnetic waves in the junction, and it can be obtained as γ ≃ ( R$_{q}$C ) − 1 where C is the capacitance of a junction per unit area, R$_{q}$ is the quasiparticle tunneling junction resistance at voltage V = V$_{1}$ per unit area [1]. Trapped Abrikosov vortices increase the quasiparticle current by virtue of their normal cores [19, 31] and, the value of γ has to also increase. Therefore the value of γ = 1 . 1 × 10 10 s − $^{1}$, obtained 15 D. First Fiske step in the presence of trapped Abrikosov vortices