Seems are a bit better

There is still less density in the axis. I don't find a reason why.
There must be a modification to the weight...

src/modules/moduleInject.f90

@@ -306,8 +306,6 @@ MODULE moduleInject
 
       nMin = nMin + 1
       nMax = nMin + self%nParticles - 1
-      !Assign weight to particle.
-      partInj(nMin:nMax)%weight = self%species%weight
       !Particle is considered to be outside the domain
       partInj(nMin:nMax)%n_in = .FALSE.
       !$OMP END SINGLE
@@ -315,10 +313,11 @@ MODULE moduleInject
       !$OMP DO
       DO n = nMin, nMax
         randomX = randomWeighted(self%cumWeight, self%sumWeight)
-
         randomEdge => mesh%edges(self%edges(randomX))%obj
         !Random position in edge
         partInj(n)%r = randomEdge%randPos()
+        !Assign weight to particle.
+        partInj(n)%weight = self%species%weight
         !Volume associated to the edge:
         IF (ASSOCIATED(randomEdge%e1)) THEN
           partInj(n)%cell = randomEdge%e1%n