diff --git a/quadrupole/.ipynb_checkpoints/Model_of_infinite_lnegth_Quadrupole-checkpoint.ipynb b/quadrupole/.ipynb_checkpoints/Model_of_infinite_lnegth_Quadrupole-checkpoint.ipynb
new file mode 100644
index 0000000..8527401
--- /dev/null
+++ b/quadrupole/.ipynb_checkpoints/Model_of_infinite_lnegth_Quadrupole-checkpoint.ipynb
@@ -0,0 +1,60 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "import scipy.constants as sc"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# phi_0 potential for the quadrupole rods\n",
+    "def phi_0(U, V, f, t):\n",
+    "    return U + V * np.sin(2 * np.pi * f * t)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def force_on_ion(Q_I, p_I, Q_rods, p_rods):\n",
+    "    K = 1 / (4 * np.pi * sc.epsilon_0)\n",
+    "    \n",
+    "    # sum all individual electric field contributions of the rods\n",
+    "    for Q in Q_rods:\n",
+    "        "
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/quadrupole/Model_of_infinite_lnegth_Quadrupole.ipynb b/quadrupole/Model_of_infinite_lnegth_Quadrupole.ipynb
new file mode 100644
index 0000000..8527401
--- /dev/null
+++ b/quadrupole/Model_of_infinite_lnegth_Quadrupole.ipynb
@@ -0,0 +1,60 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "import scipy.constants as sc"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# phi_0 potential for the quadrupole rods\n",
+    "def phi_0(U, V, f, t):\n",
+    "    return U + V * np.sin(2 * np.pi * f * t)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def force_on_ion(Q_I, p_I, Q_rods, p_rods):\n",
+    "    K = 1 / (4 * np.pi * sc.epsilon_0)\n",
+    "    \n",
+    "    # sum all individual electric field contributions of the rods\n",
+    "    for Q in Q_rods:\n",
+    "        "
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}