Huge improvement in reset (by increasing a little bit push time) using

OMP locks to assign particles to cells in the pushing step.

Trying to combine push+reset and  collision+scatter did not work.

src/modules/moduleMesh.f95

@@ -2,6 +2,7 @@
 MODULE moduleMesh
   USE moduleList
   USE moduleOutput
+  USE OMP_LIB
   IMPLICIT NONE
 
   !Parent of Node element
@@ -90,6 +91,8 @@ MODULE moduleMesh
     REAL(8):: volume = 0.D0
     !List of particles inside the volume
     TYPE(listNode):: listPart_in
+    !Lock indicator for listPart_in
+    INTEGER(KIND=OMP_LOCK_KIND):: lock
     !Number of collisions per volume
     INTEGER:: nColl = 0
     CONTAINS
@@ -131,7 +134,7 @@ MODULE moduleMesh
       IMPORT:: meshVol
       CLASS(meshVol), INTENT(inout):: self
       CLASS(meshVol), OPTIONAL, INTENT(in):: oldCell
-      CLASS(particle), INTENT(inout):: part
+      CLASS(particle), INTENT(inout), TARGET:: part
 
     END SUBROUTINE findCell_interface