diff --git a/numass-main/src/main/groovy/inr/numass/scripts/ShowTransmission.groovy b/numass-main/src/main/groovy/inr/numass/scripts/ShowTransmission.groovy
index caee2883..bc4be8e9 100644
--- a/numass-main/src/main/groovy/inr/numass/scripts/ShowTransmission.groovy
+++ b/numass-main/src/main/groovy/inr/numass/scripts/ShowTransmission.groovy
@@ -2,38 +2,78 @@ package inr.numass.scripts
 
 import hep.dataforge.context.Context
 import hep.dataforge.context.Global
-import hep.dataforge.grind.Grind
+import hep.dataforge.grind.GrindShell
 import hep.dataforge.grind.helpers.PlotHelper
 import hep.dataforge.plots.fx.FXPlotManager
+import hep.dataforge.stat.fit.ParamSet
+import inr.numass.NumassPlugin
 import inr.numass.models.sterile.NumassResolution
-import javafx.application.Platform
+import inr.numass.models.sterile.SterileNeutrinoSpectrum
+
+import static hep.dataforge.grind.Grind.buildMeta
+import static hep.dataforge.grind.Grind.morph
 
 Context ctx = Global.instance()
 ctx.pluginManager().load(FXPlotManager)
+ctx.pluginManager().load(NumassPlugin.class)
 
-PlotHelper plot = new PlotHelper(ctx);
+GrindShell shell = new GrindShell(ctx)
 
-def resolution1 = new NumassResolution(
-        ctx,
-        Grind.buildMeta("resolution", width: 8.3e-5, tail: "(0.99797 - 3.05346E-7*D - 5.45738E-10 * D**2 - 6.36105E-14 * D**3)")
-)
+shell.eval {
+    PlotHelper plot = plots
+
+
+    ParamSet params = morph(ParamSet, "params") {
+        N(value: 2.7e+06, err: 30, lower: 0)
+        bkg(value: 5.0, err: 0.1)
+        E0(value: 18575.0, err: 0.1)
+        mnu2(value: 0, err: 0.01)
+        msterile2(value: 1000**2, err: 1)
+        U2(value: 0.0, err: 1e-3)
+        X(value: 0.0, err: 0.01, lower: 0)
+        trap(value: 1.0, err: 0.05)
+    }
+
+    def meta1 = buildMeta {
+        resolution(width: 8.3e-5, tail: "(0.99797 - 3.05346E-7*D - 5.45738E-10 * D**2 - 6.36105E-14 * D**3)")
+    }
+
+    def meta2 = buildMeta {
+        resolution(width: 8.3e-5, tail: "(0.99797 - 3.05346E-7*D - 5.45738E-10 * D**2 - 6.36105E-14 * D**3)*(1-5e-3*sqrt(E/1000))")
+    }
+
+    def resolution1 = new NumassResolution(
+            ctx,
+            meta1.getMeta("resolution")
+    )
+
+    def resolution2 = new NumassResolution(
+            ctx,
+            meta2.getMeta("resolution")
+    )
+
+    plot.plot(frame: "resolution", from: 13500, to: 19000) { x ->
+        resolution1.value(x, 14000, params)
+    }
+
+    plot.plot(frame: "resolution", from: 13500, to: 19000) { x ->
+        resolution2.value(x, 14000, params)
+    }
+
+    def spectrum1 = new SterileNeutrinoSpectrum(ctx, meta1)
+    def spectrum2 = new SterileNeutrinoSpectrum(ctx, meta2)
+
+    def x = []
+    def y1 = []
+    def y2 = []
+    (13500..19000).step(100).each {
+        x << it
+        y1 << spectrum1.value(it, params)
+        y2 << spectrum2.value(it, params)
+    }
+
+    plot.plot(x, y1, "spectrum1", "spectrum")
+    plot.plot(x, y2, "spectrum2", "spectrum")
 
-plot.plot(from: 13500, to: 19000) { x ->
-    resolution1.value(x, 14000, null)
 }
 
-def resolution2 = new NumassResolution(
-        ctx,
-        Grind.buildMeta("resolution",
-                width: 8.3e-5,
-                tail: "(0.99797 - 3.05346E-7*D - 5.45738E-10 * D**2 - 6.36105E-14 * D**3)*(1-5e-3*sqrt(E/1000))"
-        )
-)
-
-plot.plot(from: 13500, to: 19000) { x ->
-    resolution2.value(x, 14000, null)
-}
-
-
-Platform.setImplicitExit(true)
-
diff --git a/numass-main/src/main/java/inr/numass/utils/NumassIntegrator.java b/numass-main/src/main/java/inr/numass/utils/NumassIntegrator.java
index 86cd90ba..567ba105 100644
--- a/numass-main/src/main/java/inr/numass/utils/NumassIntegrator.java
+++ b/numass-main/src/main/java/inr/numass/utils/NumassIntegrator.java
@@ -7,6 +7,7 @@ package inr.numass.utils;
 
 import hep.dataforge.maths.integration.GaussRuleIntegrator;
 import hep.dataforge.maths.integration.UnivariateIntegrator;
+import org.slf4j.LoggerFactory;
 
 /**
  * @author Alexander Nozik
@@ -21,6 +22,7 @@ public class NumassIntegrator {
 
     public static UnivariateIntegrator getFastInterator() {
         if (fastInterator == null) {
+            LoggerFactory.getLogger(NumassIntegrator.class).debug("Creating fast integrator");
             fastInterator = new GaussRuleIntegrator((int) (mult * 100));
         }
         return fastInterator;
@@ -28,6 +30,7 @@ public class NumassIntegrator {
 
     public static UnivariateIntegrator getDefaultIntegrator() {
         if (defaultIntegrator == null) {
+            LoggerFactory.getLogger(NumassIntegrator.class).debug("Creating default integrator");
             defaultIntegrator = new GaussRuleIntegrator((int) (mult * 300));
         }
         return defaultIntegrator;
@@ -35,6 +38,7 @@ public class NumassIntegrator {
 
     public static UnivariateIntegrator getHighDensityIntegrator() {
         if (highDensityIntegrator == null) {
+            LoggerFactory.getLogger(NumassIntegrator.class).debug("Creating high precision integrator");
             highDensityIntegrator = new GaussRuleIntegrator((int) (mult * 500));
         }
         return highDensityIntegrator;