Particle Manipulators: Init Multi Ion Species

src/picongpu/include/particles/manipulators/AssignImpl.hpp

@@ -40,7 +40,7 @@ struct AssignImpl
         typedef AssignImpl type;
     };
 
-    HINLINE AssignImpl(uint32_t currentStep)
+    HINLINE AssignImpl(uint32_t)
     {
     }
 

src/picongpu/include/particles/manipulators/DriftImpl.hpp

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013-2014 Axel Huebl, Rene Widera
+ * Copyright 2013-2015 Axel Huebl, Rene Widera
  *
  * This file is part of PIConGPU.
  *
@@ -40,9 +40,8 @@ struct DriftImpl : private T_ValueFunctor
 
     typedef T_ValueFunctor ValueFunctor;
 
-    HINLINE DriftImpl(uint32_t currentStep)
+    HINLINE DriftImpl(uint32_t)
     {
-
     }
 
     template<typename T_Particle1, typename T_Particle2>

src/picongpu/include/particles/manipulators/FreeImpl.hpp

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013-2015 Rene Widera
+ * Copyright 2013-2015 Rene Widera, Axel Huebl
  *
  * This file is part of PIConGPU.
  *
@@ -43,9 +43,8 @@ struct FreeImpl
         typedef FreeImpl<T_Functor> type;
     };
 
-    HINLINE FreeImpl(uint32_t currentStep)
+    HINLINE FreeImpl(uint32_t)
     {
-
     }
 
     template<typename T_Particle1, typename T_Particle2>

src/picongpu/include/particles/manipulators/NoneImpl.hpp

@@ -38,7 +38,7 @@ struct NoneImpl
         typedef NoneImpl type;
     };
 
-    HINLINE NoneImpl(uint32_t currentStep)
+    HINLINE NoneImpl(uint32_t)
     {
     }
 

src/picongpu/include/particles/manipulators/ProtonTimesWeightingImpl.def

@@ -0,0 +1,52 @@
+/**
+ * Copyright 2015 Axel Huebl
+ *
+ * This file is part of PIConGPU.
+ *
+ * PIConGPU is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * PIConGPU is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PIConGPU.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+namespace picongpu
+{
+namespace particles
+{
+namespace manipulators
+{
+
+/* Re-scale the weighting of a cloned species by numberOfProtons
+ *
+ * When cloning species from each other, the new
+ * species "inherits" the macro-particle weighting
+ * of the first one.
+ * This functor can be used to manipulate the weighting
+ * of the new species' macro particles to be a multiplied by
+ * the number of protons on the initial species.
+ *
+ * As an example, this comes useful when initializing a quasi-neutral,
+ * pre-ionized plasma of ions and electrons. Electrons can be created
+ * from ions via cloning and increasing their weight to avoid simulating
+ * multiple macro electrons per macro ion (with Z>1).
+ *
+ * note: needs the atomicNumbers flag on the initial species,
+ *       used by the GetAtomicNumbers trait.
+ */
+struct ProtonTimesWeightingImpl;
+
+} //namespace manipulators
+} //namespace particles
+} //namespace picongpu

src/picongpu/include/particles/manipulators/ProtonTimesWeightingImpl.hpp

@@ -0,0 +1,78 @@
+/**
+ * Copyright 2015 Axel Huebl
+ *
+ * This file is part of PIConGPU.
+ *
+ * PIConGPU is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * PIConGPU is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PIConGPU.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+#include "particles/manipulators/ProtonTimesWeightingImpl.def"
+#include "particles/traits/GetAtomicNumbers.hpp"
+
+#include "simulation_defines.hpp"
+
+namespace picongpu
+{
+namespace particles
+{
+namespace manipulators
+{
+
+struct ProtonTimesWeightingImpl
+{
+
+    template<typename T_SpeciesType>
+    struct apply
+    {
+        typedef ProtonTimesWeightingImpl type;
+    };
+
+    HINLINE ProtonTimesWeightingImpl(uint32_t)
+    {
+    }
+
+    /* Increase weighting of particleDest by proton number of SrcParticle
+     *
+     * The frame's `atomicNumber` `numberOfProtons`of `T_SrcParticle`
+     * is used to increase the weighting of particleDest.
+     * Useful to increase the weighting of macro electrons when cloned from an
+     * ion with Z>1. Otherwise one would need Z macro electrons (each with the
+     * same weighting as the initial ion) to keep the charge of a pre-ionized
+     * atom neutral.
+     *
+     * \tparam T_DestParticle type of the particle species with weighting to manipulate
+     * \tparam T_SrcParticle type of the particle species with proton number Z
+     *
+     * \see picongpu::particles::ManipulateCloneSpecies , picongpu::kernelCloneParticles
+     */
+    template<typename T_DestParticle, typename T_SrcParticle>
+    DINLINE void operator()(const DataSpace<simDim>&,
+                            T_DestParticle& particleDest, T_SrcParticle&,
+                            const bool isDestParticle, const bool isSrcParticle)
+    {
+        if (isDestParticle && isSrcParticle)
+        {
+            const float_X protonNumber = traits::GetAtomicNumbers<T_SrcParticle>::type::numberOfProtons;
+            particleDest[weighting_] *= protonNumber;
+        }
+    }
+};
+
+} //namespace manipulators
+} //namespace particles
+} //namespace picongpu

src/picongpu/include/particles/manipulators/RatioWeightingImpl.def

@@ -0,0 +1,47 @@
+/**
+ * Copyright 2015 Axel Huebl
+ *
+ * This file is part of PIConGPU.
+ *
+ * PIConGPU is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * PIConGPU is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PIConGPU.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+namespace picongpu
+{
+namespace particles
+{
+namespace manipulators
+{
+
+/* Re-scale the weighting of a cloned species by densityRatio
+ *
+ * When cloning species from each other, the new
+ * species "inherits" the macro-particle weighting
+ * of the first one.
+ * This functor can be used to manipulate the weighting
+ * of the new species' macro particles to satisfy the
+ * input densityRatio of it.
+ *
+ * note: needs the densityRatio flag on both species,
+ *       used by the GetDensityRatio trait.
+ */
+struct RatioWeighting;
+
+} //namespace manipulators
+} //namespace particles
+} //namespace picongpu

src/picongpu/include/particles/manipulators/RatioWeightingImpl.hpp

@@ -0,0 +1,87 @@
+/**
+ * Copyright 2015 Axel Huebl
+ *
+ * This file is part of PIConGPU.
+ *
+ * PIConGPU is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * PIConGPU is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PIConGPU.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+#include "particles/manipulators/RatioWeightingImpl.def"
+#include "particles/traits/GetDensityRatio.hpp"
+
+#include "simulation_defines.hpp"
+
+namespace picongpu
+{
+namespace particles
+{
+namespace manipulators
+{
+
+struct RatioWeightingImpl
+{
+
+    template<typename T_SpeciesType>
+    struct apply
+    {
+        typedef RatioWeightingImpl type;
+    };
+
+    HINLINE RatioWeightingImpl(uint32_t)
+    {
+    }
+
+    /* Adjust the weighting of particleDes by densityRatio of own & Src particle
+     *
+     * While cloning a particle (particleDes) from another (T_SrcParticle), one
+     * can afterward directly normalize the weighting back to the intended density:
+     * - divide weighting with the `T_SrcParticle`'s densityRatio
+     *   (to get macro particle weighting according to reference GAS_DENSITY * profile
+     *    at this specific point in space & time)
+     * - multiply weighting with own densityRatio (to get this species'
+     *    densityRatio * GAS_DENSITY * profile)
+     *
+     * This is useful when the profile and number of macro particles for both species
+     * shall be the same and the initialization of another profile via `CreateGas`
+     * would be expensive (or one wants to keep the exact same position while cloning).
+     *
+     * \tparam T_DesParticle type of the particle species with weighting to manipulate
+     * \tparam T_SrcParticle type of the particle species one cloned from
+     *
+     * \see picongpu::particles::ManipulateCloneSpecies , picongpu::kernelCloneParticles
+     */
+    template<typename T_DesParticle, typename T_SrcParticle>
+    DINLINE void operator()(const DataSpace<simDim>&,
+                            T_DesParticle& particleDes, T_SrcParticle&,
+                            const bool isDesParticle, const bool isSrcParticle)
+    {
+        if (isDesParticle && isSrcParticle)
+        {
+            const float_X densityRatioDes =
+                traits::GetDensityRatio<T_DesParticle>::type::getDefaultValue();
+            const float_X densityRatioSrc =
+                traits::GetDensityRatio<T_SrcParticle>::type::getDefaultValue();
+
+            particleDes[weighting_] *= densityRatioDes / densityRatioSrc;
+        }
+    }
+};
+
+} //namespace manipulators
+} //namespace particles
+} //namespace picongpu

src/picongpu/include/particles/manipulators/SetAttributeImpl.hpp

@@ -1,5 +1,5 @@
 /**
- * Copyright 2015 Marco Garten
+ * Copyright 2015 Marco Garten, Axel Huebl
  *
  * This file is part of PIConGPU.
  *
@@ -39,9 +39,8 @@ struct SetAttributeImpl : private T_ValueFunctor
 
     typedef T_ValueFunctor ValueFunctor;
 
-    HINLINE SetAttributeImpl(uint32_t currentStep)
+    HINLINE SetAttributeImpl(uint32_t)
     {
-
     }
 
     template<typename T_Particle1, typename T_Particle2>

src/picongpu/include/particles/manipulators/manipulators.def

@@ -1,5 +1,5 @@
 /**
- * Copyright 2014 Rene Widera
+ * Copyright 2014-2015 Rene Widera, Axel Huebl
  *
  * This file is part of PIConGPU.
  *
@@ -32,3 +32,5 @@
 #include "particles/manipulators/FreeImpl.def"
 #include "particles/manipulators/SetAttributeImpl.def"
 #include "particles/manipulators/RandomPositionImpl.def"
+#include "particles/manipulators/RatioWeightingImpl.def"
+#include "particles/manipulators/ProtonTimesWeightingImpl.def"

src/picongpu/include/particles/manipulators/manipulators.hpp

@@ -1,5 +1,5 @@
 /**
- * Copyright 2014 Rene Widera
+ * Copyright 2014-2015 Rene Widera, Axel Huebl
  *
  * This file is part of PIConGPU.
  *
@@ -31,3 +31,5 @@
 #include "particles/manipulators/FreeImpl.hpp"
 #include "particles/manipulators/SetAttributeImpl.hpp"
 #include "particles/manipulators/RandomPositionImpl.hpp"
+#include "particles/manipulators/RatioWeightingImpl.hpp"
+#include "particles/manipulators/ProtonTimesWeightingImpl.hpp"