Update Source/Particles/PhysicalParticleContainer.cpp

Co-authored-by: Remi Lehe <[email protected]>
aeriforme · Feb 22, 2024 · 179321a · 179321a
1 parent 33e6123
commit 179321a
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/Source/Particles/PhysicalParticleContainer.cpp b/Source/Particles/PhysicalParticleContainer.cpp
@@ -590,6 +590,8 @@ PhysicalParticleContainer::AddGaussianBeam (
                 Real v_dot_n = v_x * n_x + v_y * n_y + v_z * n_z;
                 Real t = ((x_f-x)*n_x + (y_f-y)*n_y + (z_f-z)*n_z) / v_dot_n;
 
+                // Displace particles in the direction orthogonal to the beam bulk momentum
+                // i.e. orthogonal to (n_x, n_y, n_z)
 #if defined(WARPX_DIM_3D) || defined(WARPX_DIM_RZ)
                 x = x - (v_x - v_dot_n*n_x) * t;
                 y = y - (v_y - v_dot_n*n_y) * t;