diff --git a/Core/Background/PoissonNoiseBackground.cpp b/Core/Background/PoissonBackground.cpp
similarity index 62%
rename from Core/Background/PoissonNoiseBackground.cpp
rename to Core/Background/PoissonBackground.cpp
index 92f8163d9182a1153f1261c41b0ca0bb05322b44..c0a69402ad8fbbf7ac5a97b87ca8fbfe2b963fb9 100644
--- a/Core/Background/PoissonNoiseBackground.cpp
+++ b/Core/Background/PoissonBackground.cpp
@@ -2,8 +2,8 @@
 //
 //  BornAgain: simulate and fit reflection and scattering
 //
-//! @file      Core/Background/PoissonNoiseBackground.cpp
-//! @brief     Implements class PoissonNoiseBackground.
+//! @file      Core/Background/PoissonBackground.cpp
+//! @brief     Implements class PoissonBackground.
 //!
 //! @homepage  http://www.bornagainproject.org
 //! @license   GNU General Public License v3 or higher (see COPYING)
@@ -12,20 +12,20 @@
 //
 //  ************************************************************************************************
 
-#include "Core/Background/PoissonNoiseBackground.h"
+#include "Core/Background/PoissonBackground.h"
 #include "Base/Math/Functions.h"
 
-PoissonNoiseBackground::PoissonNoiseBackground()
+PoissonBackground::PoissonBackground()
     : IBackground({})
 {
 }
 
-PoissonNoiseBackground* PoissonNoiseBackground::clone() const
+PoissonBackground* PoissonBackground::clone() const
 {
-    return new PoissonNoiseBackground;
+    return new PoissonBackground;
 }
 
-double PoissonNoiseBackground::addBackground(double intensity) const
+double PoissonBackground::addBackground(double intensity) const
 {
     return Math::GeneratePoissonRandom(intensity);
 }
diff --git a/Core/Background/PoissonNoiseBackground.h b/Core/Background/PoissonBackground.h
similarity index 60%
rename from Core/Background/PoissonNoiseBackground.h
rename to Core/Background/PoissonBackground.h
index 25002bdbce7cd8052d6b88e7330adf0e936739ba..ea8f6315f75501e59fcee88749e6ae0e7e9f2528 100644
--- a/Core/Background/PoissonNoiseBackground.h
+++ b/Core/Background/PoissonBackground.h
@@ -2,8 +2,8 @@
 //
 //  BornAgain: simulate and fit reflection and scattering
 //
-//! @file      Core/Background/PoissonNoiseBackground.h
-//! @brief     Defines class PoissonNoiseBackground.
+//! @file      Core/Background/PoissonBackground.h
+//! @brief     Defines class PoissonBackground.
 //!
 //! @homepage  http://www.bornagainproject.org
 //! @license   GNU General Public License v3 or higher (see COPYING)
@@ -12,8 +12,8 @@
 //
 //  ************************************************************************************************
 
-#ifndef BORNAGAIN_CORE_BACKGROUND_POISSONNOISEBACKGROUND_H
-#define BORNAGAIN_CORE_BACKGROUND_POISSONNOISEBACKGROUND_H
+#ifndef BORNAGAIN_CORE_BACKGROUND_POISSONBACKGROUND_H
+#define BORNAGAIN_CORE_BACKGROUND_POISSONBACKGROUND_H
 
 #include "Core/Background/IBackground.h"
 
@@ -21,14 +21,14 @@
 //!
 //! @ingroup simulation
 
-class PoissonNoiseBackground : public IBackground {
+class PoissonBackground : public IBackground {
 public:
-    PoissonNoiseBackground();
-    PoissonNoiseBackground* clone() const override;
-    std::string className() const final { return "PoissonNoiseBackground"; }
+    PoissonBackground();
+    PoissonBackground* clone() const override;
+    std::string className() const final { return "PoissonBackground"; }
     // const auto tooltip = "class_tooltip";
 
     double addBackground(double intensity) const override;
 };
 
-#endif // BORNAGAIN_CORE_BACKGROUND_POISSONNOISEBACKGROUND_H
+#endif // BORNAGAIN_CORE_BACKGROUND_POISSONBACKGROUND_H
diff --git a/Core/Export/SimulationToPython.cpp b/Core/Export/SimulationToPython.cpp
index 92311368aadde467437ea480a767f71c2844eedc..e2101ed1e881accfc79eed28ddf1c95df794e752 100644
--- a/Core/Export/SimulationToPython.cpp
+++ b/Core/Export/SimulationToPython.cpp
@@ -16,7 +16,7 @@
 #include "Base/Py/PyFmt.h"
 #include "Base/Util/Algorithms.h"
 #include "Core/Background/ConstantBackground.h"
-#include "Core/Background/PoissonNoiseBackground.h"
+#include "Core/Background/PoissonBackground.h"
 #include "Core/Export/PyFmt2.h"
 #include "Core/Export/PyFmtLimits.h"
 #include "Core/Export/SampleToPython.h"
@@ -401,8 +401,8 @@ std::string defineBackground(const ISimulation* simulation)
                    << Py::Fmt::printScientificDouble(constant_bg->backgroundValue()) << ")\n";
             result << indent() << "simulation.setBackground(background)\n";
         }
-    } else if (dynamic_cast<const PoissonNoiseBackground*>(bg)) {
-        result << indent() << "background = ba.PoissonNoiseBackground()\n";
+    } else if (dynamic_cast<const PoissonBackground*>(bg)) {
+        result << indent() << "background = ba.PoissonBackground()\n";
         result << indent() << "simulation.setBackground(background)\n";
     }
     return result.str();
diff --git a/Examples/fit52_Advanced/fit_along_slices.py b/Examples/fit52_Advanced/fit_along_slices.py
index acb2281096ae3730302ff38d7842927ff7fe7d33..5da829154d4a40cf2b63b95eccf6a841a5ce5b68 100755
--- a/Examples/fit52_Advanced/fit_along_slices.py
+++ b/Examples/fit52_Advanced/fit_along_slices.py
@@ -68,7 +68,7 @@ def create_real_data():
 
     # retrieving simulated data in the form of numpy array
     simulation = get_simulation(params, add_masks=False)
-    simulation.setBackground(ba.PoissonNoiseBackground())
+    simulation.setBackground(ba.PoissonBackground())
     simulation.runSimulation()
 
     return simulation.result().array()
diff --git a/GUI/Model/Item/BackgroundItems.cpp b/GUI/Model/Item/BackgroundItems.cpp
index 3cf6d02170105a1dfb5360bc44543670673a330c..99c3f2a03d372cdbe6cb9d84e3d2ca0c33db9bbb 100644
--- a/GUI/Model/Item/BackgroundItems.cpp
+++ b/GUI/Model/Item/BackgroundItems.cpp
@@ -14,7 +14,7 @@
 
 #include "GUI/Model/Item/BackgroundItems.h"
 #include "Core/Background/ConstantBackground.h"
-#include "Core/Background/PoissonNoiseBackground.h"
+#include "Core/Background/PoissonBackground.h"
 #include "GUI/Model/Types/DoubleDescriptor.h"
 #include "GUI/Model/XML/Serializer.h"
 
@@ -35,9 +35,9 @@ void ConstantBackgroundItem::serialize(Serializer& s)
     s.rw(m_backgroundValue);
 }
 
-std::unique_ptr<IBackground> PoissonNoiseBackgroundItem::createBackground() const
+std::unique_ptr<IBackground> PoissonBackgroundItem::createBackground() const
 {
-    return std::make_unique<PoissonNoiseBackground>();
+    return std::make_unique<PoissonBackground>();
 }
 
 std::unique_ptr<IBackground> NoBackgroundItem::createBackground() const
diff --git a/GUI/Model/Item/BackgroundItems.h b/GUI/Model/Item/BackgroundItems.h
index 4b3cca613bf65979468020ba345c76b25e720d16..0df45095136f0fde7511db7e2b7d328dd194ea8b 100644
--- a/GUI/Model/Item/BackgroundItems.h
+++ b/GUI/Model/Item/BackgroundItems.h
@@ -43,7 +43,7 @@ public:
     DOUBLE_PROPERTY(backgroundValue, BackgroundValue);
 };
 
-class PoissonNoiseBackgroundItem : public BackgroundItem {
+class PoissonBackgroundItem : public BackgroundItem {
 public:
     std::unique_ptr<IBackground> createBackground() const override;
 };
diff --git a/GUI/Model/MakeItem/BackgroundItemCatalog.cpp b/GUI/Model/MakeItem/BackgroundItemCatalog.cpp
index ac68f40da8949cfd683314380993fac0a6a3c423..a86aba7d143a0c3f09eae858f206839425692fe2 100644
--- a/GUI/Model/MakeItem/BackgroundItemCatalog.cpp
+++ b/GUI/Model/MakeItem/BackgroundItemCatalog.cpp
@@ -24,7 +24,7 @@ BackgroundItem* BackgroundItemCatalog::create(Type type)
     case Type::Constant:
         return new ConstantBackgroundItem();
     case Type::Poission:
-        return new PoissonNoiseBackgroundItem();
+        return new PoissonBackgroundItem();
     }
     ASSERT(false);
 }
@@ -53,7 +53,7 @@ BackgroundItemCatalog::Type BackgroundItemCatalog::type(const BackgroundItem* it
         return Type::None;
     if (dynamic_cast<const ConstantBackgroundItem*>(item))
         return Type::Constant;
-    if (dynamic_cast<const PoissonNoiseBackgroundItem*>(item))
+    if (dynamic_cast<const PoissonBackgroundItem*>(item))
         return Type::Poission;
 
     ASSERT(false);
diff --git a/GUI/View/FromDomain/FromDomain.cpp b/GUI/View/FromDomain/FromDomain.cpp
index 60ec2aec1c6d8202a95faf177b3f4d3597ba2469..ce51174f29ce1829676662a9d2bb6f1ea5fd1bdc 100644
--- a/GUI/View/FromDomain/FromDomain.cpp
+++ b/GUI/View/FromDomain/FromDomain.cpp
@@ -15,7 +15,7 @@
 #include "GUI/View/FromDomain/FromDomain.h"
 #include "Base/Const/Units.h"
 #include "Core/Background/ConstantBackground.h"
-#include "Core/Background/PoissonNoiseBackground.h"
+#include "Core/Background/PoissonBackground.h"
 #include "Core/Scan/AlphaScan.h"
 #include "Core/Scan/ScanResolution.h"
 #include "Core/Simulation/includeSimulations.h"
@@ -743,8 +743,8 @@ void GUI::Transform::FromDomain::setBackground(InstrumentItem* instrument_item,
         auto* constant_bg_item = instrument_item->setBackgroundType<ConstantBackgroundItem>();
         double value = p_constant_bg->backgroundValue();
         constant_bg_item->setBackgroundValue(value);
-    } else if (dynamic_cast<const PoissonNoiseBackground*>(p_bg))
-        instrument_item->setBackgroundType<PoissonNoiseBackgroundItem>();
+    } else if (dynamic_cast<const PoissonBackground*>(p_bg))
+        instrument_item->setBackgroundType<PoissonBackgroundItem>();
 }
 
 void GUI::Transform::FromDomain::setFootprintFactor(const IFootprintFactor* footprint,
diff --git a/Wrap/Swig/libBornAgainCore.i b/Wrap/Swig/libBornAgainCore.i
index 1bb1c1c3f0fea15054a888af67a737fcac0f98ae..9611ec8e3cda0611a8eb496fde42e2047e9f52d6 100644
--- a/Wrap/Swig/libBornAgainCore.i
+++ b/Wrap/Swig/libBornAgainCore.i
@@ -60,7 +60,7 @@
 #include "Sample/Scattering/ISampleNode.h"
 
 #include "Core/Background/ConstantBackground.h"
-#include "Core/Background/PoissonNoiseBackground.h"
+#include "Core/Background/PoissonBackground.h"
 #include "Core/Export/ExportToPython.h"
 #include "Core/Fitting/FitObjective.h"
 #include "Core/Fitting/IterationInfo.h"
@@ -115,7 +115,7 @@
 
 %include "Core/Background/IBackground.h"
 %include "Core/Background/ConstantBackground.h"
-%include "Core/Background/PoissonNoiseBackground.h"
+%include "Core/Background/PoissonBackground.h"
 
 %include "Core/Export/ExportToPython.h"
 
diff --git a/hugo/static/files/python/fitting/ex02_AdvancedExamples/fit_along_slices.py b/hugo/static/files/python/fitting/ex02_AdvancedExamples/fit_along_slices.py
index 29d734681f1bdecb7f1515cd11ac1d2178b25581..b2cbe0162eb43b32925b6b6c0271c0953cc4cbb0 100644
--- a/hugo/static/files/python/fitting/ex02_AdvancedExamples/fit_along_slices.py
+++ b/hugo/static/files/python/fitting/ex02_AdvancedExamples/fit_along_slices.py
@@ -68,7 +68,7 @@ def create_real_data():
 
     # retrieving simulated data in the form of numpy array
     simulation = get_simulation(params, add_masks=False)
-    simulation.setBackground(ba.PoissonNoiseBackground())
+    simulation.setBackground(ba.PoissonBackground())
     simulation.runSimulation()
 
     return simulation.result().array()