diff --git a/NPSimulation/Detectors/Actar/Actar.cc b/NPSimulation/Detectors/Actar/Actar.cc
index 15ee6ccbaf7e63335db490c69ead96e0e547fafe..d5374006eee66af72f07730fc85971bad4b48301 100644
--- a/NPSimulation/Detectors/Actar/Actar.cc
+++ b/NPSimulation/Detectors/Actar/Actar.cc
@@ -269,7 +269,7 @@ G4LogicalVolume* Actar::BuildDetector() {
     MPT->AddConstProperty("DE_YIELD", 3e-1, true);
     // MPT->AddConstProperty("DE_AMPLIFICATION",2,true);
     MPT->AddConstProperty("DE_ABSLENGTH", 1 * pc, true);
-    MPT->AddConstProperty("DE_DRIFTSPEED", 0.8 * cm / microsecond, true);
+    MPT->AddConstProperty("DE_DRIFTSPEED", 1.28 * cm / microsecond, true);
     MPT->AddConstProperty("DE_TRANSVERSALSPREAD", 2e-5 * mm2 / ns, true);
     MPT->AddConstProperty("DE_LONGITUDINALSPREAD", 4e-6 * mm2 / ns, true);
     DriftGasMaterial->SetMaterialPropertiesTable(MPT);
@@ -349,7 +349,7 @@ G4LogicalVolume* Actar::BuildDetector() {
      logicWindows,
      "ActarEntranceWindows",m_SquareDetector,false,0);*/
 
-    G4ElectricField* field = new G4UniformElectricField(G4ThreeVector(0.0, -400 * volt / cm, 0.0));
+    G4ElectricField* field = new G4UniformElectricField(G4ThreeVector(0.0, -70 * volt / cm, 0.0));
     // Create an equation of motion for this field
     G4EqMagElectricField* Equation = new G4EqMagElectricField(field);
     G4MagIntegratorStepper* Stepper = new G4ClassicalRK4(Equation, 8);