Vay Deposition: Filter D, Exchange Guard Cells of J (#3388)

* Vay Deposition: Filter D, Exchange Guard Cells of J

* Improve Inline Comment

1 files changed, 7 insertions, 2 deletions

diff --git a/Source/FieldSolver/WarpXPushFieldsEM.cpp b/Source/FieldSolver/WarpXPushFieldsEM.cpp
index a3a882962..3d68e8e52 100644
--- a/Source/FieldSolver/WarpXPushFieldsEM.cpp
+++ b/Source/FieldSolver/WarpXPushFieldsEM.cpp
@@ -724,8 +724,13 @@ WarpX::PushPSATD ()
             PSATDBackwardTransformJ(current_fp, current_cp);
             PSATDSubtractCurrentPartialSumsAvg();
 
-            // Synchronize J and rho (if used)
-            SyncCurrent(current_fp, current_cp);
+            // Synchronize J and rho (if used).
+            // Here we call SumBoundaryJ instead of SyncCurrent, because
+            // filtering has been already applied to D in OneStep_nosub,
+            // by calling SyncCurrentAndRho (see Evolve/WarpXEvolve.cpp).
+            // TODO This works only without mesh refinement
+            const int lev = 0;
+            SumBoundaryJ(current_fp, lev, Geom(lev).periodicity());
             SyncRho();
         }