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-rw-r--r--Source/Utils/WarpXMovingWindow.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/Utils/WarpXMovingWindow.cpp b/Source/Utils/WarpXMovingWindow.cpp
index b8401c9a6..73a5307d2 100644
--- a/Source/Utils/WarpXMovingWindow.cpp
+++ b/Source/Utils/WarpXMovingWindow.cpp
@@ -44,7 +44,7 @@ WarpX::MoveWindow (bool move_j)
// Update the continuous position of the moving window,
// and of the plasma injection
- moving_window_x += moving_window_v * dt[0];
+ moving_window_x += (moving_window_v - WarpX::beta_boost * PhysConst::c)/(1 - moving_window_v * WarpX::beta_boost / PhysConst::c) * dt[0];
int dir = moving_window_dir;
// Update warpx.current_injection_position