diff --git a/src/coil_class.py b/src/coil_class.py
index 8c8fc17..eadd5e8 100644
--- a/src/coil_class.py
+++ b/src/coil_class.py
@@ -14,7 +14,7 @@ import matplotlib
 # matplotlib.use('Agg')
 # get_ipython().run_line_magic('matplotlib', 'qt')
 # get_ipython().run_line_magic('matplotlib', 'inline')
-import time
+# import time
 
 from src import physical_constants as cs
 
@@ -782,13 +782,13 @@ class BCoil:
         R = R_ref * (1 + alpha * (T - T_ref))
         return R
 
-    def resistance(self, T):
+    def resistance(self, tempr):
         """
         Calculates resistance of one coil of configuration
 
         Parameters
         ----------
-        T : double
+        tempr : double
             temperature in degree Celsius
 
         Returns
@@ -797,7 +797,10 @@ class BCoil:
             resistance in Ohm
         """
 
-        return BCoil.resistivity_copper(T) * self.get_wire_length() / self.get_wire_area()
+        return BCoil.resistivity_copper(tempr) * self.get_wire_length() / self.get_wire_area()
+
+    def tau(self, tempr = 22):
+        return self.induct_perry()/self.resistance(tempr)
 
 
 def main():
diff --git a/time_response/03_FINAL_time_response.py b/time_response/03_FINAL_time_response.py
new file mode 100644
index 0000000..5d3160a
--- /dev/null
+++ b/time_response/03_FINAL_time_response.py
@@ -0,0 +1,123 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Tue Sep  7 13:18:18 2021
+
+@author: Joschka
+"""
+
+import matplotlib.pyplot as plt
+import numpy as np
+
+from src import coil_class as BC
+
+HH_Coil = BC.BCoil(HH = 1, distance = 54, radius = 48, layers = 8, windings = 8, wire_height = 0.5,
+                   wire_width = 0.5, insulation_thickness = (0.546-0.5)/2, is_round = True,
+                   winding_scheme= 2)
+HH_Coil.set_R_inner(45.6)
+HH_Coil.set_d_min(2*24.075)
+# HH_Coil.print_info()
+
+
+I = 1
+Max_field = HH_Coil.max_field(I)
+HH_Coil.cooling(I, 22)
+
+
+# AHH_Coil = BC.BCoil(-1, 82 , 47.3 , 4, 6, wire_width= 1, wire_height= 1.5 ,layers_spacing = 0.25, windings_spacing= 0.25)
+
+def I_current(Coil, I_0, t):
+    L = Coil.induct_perry()
+
+    R = Coil.resistance(22.5)
+    print(f"L={L}")
+    print(f" R= {R}")
+    tau = L / R
+    print(f" τ = {tau}")
+    I = I_0 * (1 - np.exp(-R / L * t))
+    return I
+
+
+def I_current_exp(I_0, R, L, t):
+    print("")
+    print(L / R)
+    I = I_0 * (1 - np.exp(-R / L * t))
+    return I
+
+#%%
+def U_t(t, coil, U_0, I_end, scaling):
+    U_end = I_end * coil.resistance(22)
+    U = (U_0-U_end) * np.exp(-t/coil.tau() * scaling) + U_end
+    return U
+
+# t = np.linspace(0, 0.005, 1000)
+# plt.plot(t* 1e3,U_t(t, HH_Coil, 15, I))
+# plt.xlabel("t [ms]")
+# plt.show()
+# print(U_t(0, HH_Coil, 15, I))
+
+
+
+
+U_vec = np.vectorize(U_t)
+
+
+def I_t_exp(time, coil, I_end, U_0, scaling):
+    I = U_vec(time, coil, U_0, I_end, scaling) / coil.resistance(22) * (1 - np.exp(- time/coil.tau()))
+    return I
+
+def I_t_cut(time, coil, I_end, U_0):
+    I = U_0 / coil.resistance(22) * (1 - np.exp(- time / coil.tau()))
+    if I >= I_end:
+        I = I_end
+    return I
+
+I_t_cut_vec = np.vectorize(I_t_cut)
+
+
+
+
+# %%
+t = np.linspace(0, 0.003, 10000)
+fig, axs = plt.subplots(2, 1, figsize = (7,7.5))
+fig.suptitle(f"Time response HH-coil: I_max = {I} A --> Max Field = {Max_field:.2f} G \n \n I(t) = U(t) / R * (1 - exp(- R/L * t))")
+ax = axs[0]
+# ax.title("test")
+ax.plot(t * 1e3, I_current(HH_Coil, I, t), label=f"U_0 = U_end = 1.5 V")
+
+for U_0 in [10, 15, 28, 58]:
+    ax.plot(t * 1e3, I_t_cut_vec(t, HH_Coil, I, U_0), label=f"U_0 = {U_0} V, U_end = 1.5 V")
+
+# for scaling in np.arange(2,5,0.5):
+#     ax.plot(t * 1e3, I_t_exp(t, HH_Coil, I, 15, scaling), label=f"Exponential decay U")
+
+ax.set_xlabel("time [ms]")
+ax.set_ylabel("current I [A]")
+ax.legend()
+
+ax = axs[1]
+
+ax.plot(t * 1e6, I_current(HH_Coil, I, t), label=f"U_0 = U_end = 1.5 V")
+
+for U_0 in [10, 15, 28, 58]:
+    ax.plot(t * 1e6, I_t_cut_vec(t, HH_Coil, I, U_0), label=f"U_0 = {U_0} V, U_end = 1.5 V")
+# for scaling in np.arange(2,5,0.5):
+#     ax.plot(t * 1e3, I_t_exp(t, HH_Coil, I, 15, scaling), label=f"Exponential decay U")
+
+ax.set_xlabel("time [μs]")
+ax.set_ylabel("current I [A]")
+ax.set_xlim(0,120)
+ax.legend()
+
+plt.savefig('time_response_estimation.png', dpi=400)
+plt.show()
+
+# %%
+
+print(f"L = {HH_Coil.induct_perry() * 1e6} μH")
+print(f"R = {HH_Coil.resistance(22)}")
+
+V_max = 15
+I_set = 5e-3
+L = HH_Coil.induct_perry()
+f_drop = V_max/(2*np.pi*L*I_set)
+print(f_drop)
diff --git a/time_response/R_test.py b/time_response/R_test.py
index 3d95363..c3253c1 100644
--- a/time_response/R_test.py
+++ b/time_response/R_test.py
@@ -14,14 +14,14 @@ from IPython import get_ipython
 
 # get_ipython().run_line_magic('matplotlib', 'qt')
 
-I = 1.25
+I = 1
+
+HH_Coil = BC.BCoil(HH = 1, distance = 54, radius = 48, layers = 8, windings = 8, wire_height = 0.5,
+                   wire_width = 0.5, insulation_thickness = (0.546-0.5)/2, is_round = True,
+                   winding_scheme= 2)
+HH_Coil.set_R_inner(45.6)
+HH_Coil.set_d_min(2*24.075)
 
-HH_Coil = BC.BCoil(HH=1, distance=54, radius=48, layers=8, windings=8, wire_height=0.5, wire_width=0.5,
-                   windings_spacing=0.25, layers_spacing=0.25)
-HH_Coil.set_R_outer(49.3)
-HH_Coil.set_d_min(49.8)
-HH_Coil.print_info()
-# todo: asdkjflö
 
 # Fast_Coil = BC.BCoil(HH = 1, distance = 54 ,radius = 48 , layers = 8, windings = 8, wire_height =0.5, wire_width = 0.5,windings_spacing=0, layers_spacing = 0)
 # Fast_Coil.set_R_outer(49.3)
diff --git a/time_response/time_response_estimation.png b/time_response/time_response_estimation.png
new file mode 100644
index 0000000..171b408
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diff --git a/time_response_estimation.png b/time_response_estimation.png
new file mode 100644
index 0000000..781b560
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