Need to continue with B export

Coil_geometry/AHH/08_FINAL_AHH.py

@@ -65,6 +65,7 @@ AHH_Coil.cooling(I_grad, 22.5)
 #AHH_Coil.B_quick_plot(I_grad)
 #AHH_Coil.B_grad_quick_plot(I_grad)
 AHH_Coil.plot_raster(raster_value= 11)
+AHH_Coil.plot_3d(I,50,50)
 
 # zero = mu_it(0)
 # print(f"Bz_grad({z[zero]}) = {Bz_grad[zero]} G/cm")

Coil_geometry/AHH/09_Export_Gradient_field.py

@@ -0,0 +1,95 @@
+"""
+Created on 11.11.21
+
+@author: Joschka
+"""
+import numpy as np
+import matplotlib.pyplot as plt
+from src import coil_class as BC
+from src import physical_constants as cs
+import logging as log
+
+log.basicConfig(level=log.DEBUG, format='%(message)s')
+
+def main():
+    AHH_Coil = BC.BCoil(HH=-1, distance=69.313, radius=47, layers=8, windings=16,
+                        wire_height=0.5, wire_width=0.5, insulation_thickness=0.068/2,
+                        is_round=True, winding_scheme=2)
+
+    x, z = BC.BCoil.make_axis(50, 5)
+
+    I_current = 5
+
+
+    # print(BC.BCoil._BCoil__B_z_loop(I_current = I, r_loop = 1, z_loop = 1, r_pos = 0, z_pos = 0.1)
+    #       - BC.BCoil._BCoil__B_z_loop(I_current = I, r_loop = 1, z_loop = -1, r_pos = 0, z_pos = 0.1))
+    # print(BC.BCoil._BCoil__B_z_loop(I_current=I, r_loop=1, z_loop=1, r_pos=0, z_pos= -0.1)
+    #       - BC.BCoil._BCoil__B_z_loop(I_current=I, r_loop=1, z_loop=-1, r_pos=0, z_pos=-0.1))
+
+
+    step = 1
+    xlim_mm = 30
+    xlim = int(xlim_mm/step) + 1
+    ylim_mm = 30
+    ylim = int(ylim_mm/step) + 1
+    zlim_mm = 20
+    zlim = int(zlim_mm/step) + 1
+
+    B_quarter = np.zeros((xlim, ylim, zlim, 2))
+    #print(B_quarter)
+    x = np.linspace(0,xlim_mm,xlim) * 1e-3
+    y = np.linspace(0,ylim_mm,ylim) * 1e-3
+    z = np.linspace(0,zlim_mm,zlim) * 1e-3
+
+    calc_raster = AHH_Coil.full_raster(1)
+    rastering_value = len(calc_raster[0])
+    I_current /= rastering_value
+
+    for wire in range(0,AHH_Coil.get_N()):
+        for ii in range(0,rastering_value):
+            # extract position information out of raster
+            z_pos = calc_raster[wire, ii, 0]
+            r_pos = calc_raster[wire, ii, 1]
+            for xx in range(0,xlim):
+                for yy in range(0,ylim):
+
+                    r = np.sqrt(x[xx]**2 + y[yy]**2)
+
+                    # calculate z-component at x,y
+                    B_quarter[xx, yy, :, 1] += BC.BCoil._BCoil__B_z_loop(I_current, r_pos, z_pos, r, z) \
+                                    + BC.BCoil._BCoil__B_z_loop(AHH_Coil.HH * I_current, r_pos, -z_pos, r, z)
+
+                    if r == 0:
+                        continue
+                    # calculate r-component at x, y
+                    B_quarter[xx, yy, :, 0] += BC.BCoil._BCoil__B_r_loop(I_current, r_pos, z_pos, r, z) \
+                                       + BC.BCoil._BCoil__B_r_loop(AHH_Coil.HH * I_current, r_pos, -z_pos, r, z)
+
+    np.save('output/B_quarter.npy',B_quarter)
+
+    #B_tot = np.zeros(((2 * xlim) - 1, (2 * ylim) - 1, (2 * zlim)-1, 2))
+
+
+    #AHH_Coil.B_quick_plot(5,50)
+    #AHH_Coil.B_grad_quick_plot(5,50)
+
+
+    # Bz, Bx = AHH_Coil.B_field(I_current, x, z)
+    # B_tot_z, B_tot_x = AHH_Coil.B_field(I_current, x, z)
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+if __name__ == '__main__':
+    main()

Coil_geometry/AHH/10_work_with_export_data.py

@@ -0,0 +1,54 @@
+import numpy as np
+import matplotlib.pyplot as plt
+from src import coil_class as BC
+from src import physical_constants as cs
+import logging as log
+
+
+def main():
+    AHH_Coil = BC.BCoil(HH=-1, distance=69.313, radius=47, layers=8, windings=16,
+                        wire_height=0.5, wire_width=0.5, insulation_thickness=0.068 / 2,
+                        is_round=True, winding_scheme=2)
+    
+    step = 1
+    xlim_mm = 30
+    xlim = int(xlim_mm/step) + 1
+    ylim_mm = 30
+    ylim = int(ylim_mm/step) + 1
+    zlim_mm = 20
+    zlim = int(zlim_mm/step) + 1
+
+
+    x = np.linspace(0,xlim_mm,xlim) * 1e-3
+    y = np.linspace(0,ylim_mm,ylim) * 1e-3
+    z = np.linspace(0,zlim_mm,zlim) * 1e-3
+    B_quarter = np.load('output/B_quarter.npy')
+
+    x_m, z_m = np.meshgrid(x, z)
+
+    plt.figure(34)
+
+    plt.quiver(x_m,z_m,np.transpose(B_quarter[0, :, :, 0]), np.transpose(B_quarter[0, :, :, 1]))
+    plt.xlabel("x-axis [mm]")
+    plt.ylabel("z-axis [mm]")
+    plt.show()
+
+    x_m, y_m = np.meshgrid(x, y)
+
+    plt.figure(35)
+
+    plt.quiver(x_m, y_m, np.transpose(B_quarter[:, :, 0, 0]), np.transpose(B_quarter[:, :, 0, 1]))
+    plt.xlabel("x-axis [mm]")
+    plt.ylabel("y-axis [mm]")
+    plt.show()
+
+
+    # AHH_Coil.B_quick_plot(5,abs = False)
+    #AHH_Coil.plot_3d(5,30,20)
+
+
+
+
+
+if __name__ == '__main__':
+    main()

Coil_geometry/AHH/11_B_qu_to_field.py

@@ -0,0 +1,79 @@
+"""
+Created on 11.11.21
+
+@author: Joschka
+"""
+import numpy as np
+import matplotlib.pyplot as plt
+from src import coil_class as BC
+from src import physical_constants as cs
+import logging as log
+
+log.basicConfig(level=log.DEBUG, format='%(message)s')
+
+def main():
+    step = 1
+    xlim_mm = 30
+    xlim = int(xlim_mm / step) + 1
+    ylim_mm = 30
+    ylim = int(ylim_mm / step) + 1
+    zlim_mm = 20
+    zlim = int(zlim_mm / step) + 1
+
+    x = np.linspace(-xlim_mm, xlim_mm, 2*xlim + 1) * 1e-3
+    y = np.linspace(-ylim_mm, ylim_mm, 2*ylim+1) * 1e-3
+    z = np.linspace(-zlim_mm, zlim_mm, 2*zlim+1) * 1e-3
+    B_quarter = np.load('output/B_quarter.npy')
+
+
+
+    step = 1
+    xlim_mm = 30
+    xlim = 2 * int(xlim_mm/step) + 1
+    ylim_mm = 30
+    ylim = 2 * int(ylim_mm/step) + 1
+    zlim_mm = 20
+    zlim = 2 * int(zlim_mm/step) + 1
+
+    #B_quarter = np.zeros((xlim, ylim, zlim, 2))
+    #print(B_quarter)
+    x = np.linspace(-xlim_mm,xlim_mm,xlim) * 1e-3
+    y = np.linspace(-ylim_mm,ylim_mm,ylim) * 1e-3
+    z = np.linspace(-zlim_mm,zlim_mm,zlim) * 1e-3
+
+
+    B_tot = np.zeros((xlim , ylim , zlim ,2))
+
+    # First quater half x>0,y>0,z>0
+    B_tot[xlim//2: xlim, ylim//2: ylim, zlim//2 : zlim,1] = B_quarter[:,:,:,1]
+
+    print(B_tot)
+    for xx in range(xlim//2, xlim):
+        for yy in range(ylim//2,ylim):
+            pass
+
+
+
+    #AHH_Coil.B_quick_plot(5,50)
+    #AHH_Coil.B_grad_quick_plot(5,50)
+
+
+    # Bz, Bx = AHH_Coil.B_field(I_current, x, z)
+    # B_tot_z, B_tot_x = AHH_Coil.B_field(I_current, x, z)
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+if __name__ == '__main__':
+    main()

Coil_geometry/Additional coils/00_Test_coil_around viewport.py

@@ -66,6 +66,7 @@ print(f"Diff B 15 mm: {Bz[30000] - Bz[15000]}, relative: {(Bz[30000] - Bz[15000]
 
 
 HH_Coil.cooling(I_current,25)
+HH_Coil.print_info()
 #HH_Coil.B_curv_quick_plot(I_current)
 #HH_Coil.plot_raster()
 

Coil_geometry/HH/11_Final_HH.py

@@ -22,21 +22,21 @@ z = np.linspace(-15, 15, 30001)
 
 
 # New coil
-# Wire_1 = [0.5, 0.568]
-Wire_1 = [0.45, 0.514]
+Wire_1 = [0.5, 0.568]
+#Wire_1 = [0.45, 0.514]
 #I_current = 0.94
-HH_Coil = BC.BCoil(HH = 1, distance = 54, radius = 48, layers = 8, windings = 9, wire_height = Wire_1[0], wire_width = Wire_1[0], insulation_thickness=(Wire_1[1] - Wire_1[0]) / 2, is_round = True, winding_scheme= 2)
+HH_Coil = BC.BCoil(HH = 1, distance = 54, radius = 48, layers = 8, windings = 8, wire_height = Wire_1[0], wire_width = Wire_1[0], insulation_thickness=(Wire_1[1] - Wire_1[0]) / 2, is_round = True, winding_scheme= 2)
 
 I_current = 64 / HH_Coil.get_N() * 1.25
 #set radius plus distance
-HH_Coil.set_R_outer(50.5 - HH_Coil.get_tot_wire_width()*1e3)
-HH_Coil.set_d_min(47.15)
+HH_Coil.set_R_outer(50.5 - HH_Coil.get_tot_wire_width()*1e3 - 0.5)
+HH_Coil.set_d_min(47.15+1)
 print(f"height = {HH_Coil.get_coil_height()}")
 HH_Coil.print_info()
 
-Bz, Bx = HH_Coil.B_field(I_current, x, z, raster = 10)
+Bz, Bx = HH_Coil.B_field(I_current, x, z, raster = 7)
 
-B_tot_z, B_tot_x = HH_Coil.B_field(I_current, x, z, raster = 10)
+B_tot_z, B_tot_x = HH_Coil.B_field(I_current, x, z, raster = 7)
 
 Bz_curv = BC.BCoil.curv(Bz, z)
 HH_Coil.cooling(I_current,28)

Coil_geometry/HH/15_new_HH_coil_iterative_winding_decision.py

@@ -19,6 +19,7 @@ z = np.linspace(-lim,lim,nr_points)
 
 
 def mu_it(x_pos):
+    step =
     it = nr_points//2 + x_pos
     return it
 

Cooling/05_POWER_estimation_water_cooling.py

@@ -4,29 +4,40 @@ Created on 3.11.21
 @author: Joschka
 """
 import numpy as np
+import matplotlib.pyplot as plt
 from src import coil_class as BC
+from src import physical_constants as cs
 
 
+def Q_heat(flow,d_T):
+
+    V_t = 4.8 * 3.2 * 1e-6 * flow
+    m = cs.water_dens * V_t
+    Q = m * cs.water_c_p * d_T
+    return Q
+
 def main():
-    dens = 999.78 # kg/m^3
-    c_p = 4190 # J/kg*K
 
-    d_T = 3
 
-    flow = 0.3#/5 #m/s
+    d_T = 1.5
+
+    flow = 0.3/5#/5 #m/s
     #flow *=2
     print(f"flow = {flow}m/s")
     V_t = 4.8 * 3.2 * 1e-6 * flow
     print(f"Volume rate = {V_t * 1e6} mL/s")
-    m = dens * V_t
-
-    Q = m * c_p * d_T
+    m = cs.water_dens * V_t
+    Q = m * cs.water_c_p * d_T
     print(f"Q = {Q} J/s")
 
-    HH_Coil = BC.BCoil(HH=1, distance=51.694, radius=47.9263, layers=8, windings=8, wire_height=0.5,
+    #flow = np.linspace(0,5,100)
+    #plt.plot(flow,Q_heat(flow,3))
+    #plt.show()
+
+    HH_Coil = BC.BCoil(HH=1, distance=51.694, radius=47.9263, layers=8, windings=16, wire_height=0.5,
                        wire_width=0.5, insulation_thickness=0.034, is_round=True,
                        winding_scheme=2)
-    for I in np.arange(1,7,0.001):
+    for I in np.arange(1,20,0.001):
         P = HH_Coil.power(I, 23)
         if P > Q:
             break
@@ -37,6 +48,8 @@ def main():
 
     print(f"max field = {B_max} G")
 
+    print(HH_Coil.cooling(I, 25))
+
 
 
 

src/coil_class.py

@@ -322,30 +322,89 @@ class BCoil:
         B *= 1e4  # conversion Gauss
         return B
 
+    @staticmethod
+    def make_axis(lim,precision,two_axis=True):
+        """
+        Gives back two arrays x and z in mm, symmetric around zero
+        Args:
+            lim: positive (and negative if lim2 = None) limit of axis
+            precision: nr_points per mm
+            two_axis: If True --> gives back two arrays with given parameter
+
+        Returns: array
+
+        """
+        nr_points = (2 * lim) * precision + 1
+        z = np.linspace(-lim, lim, nr_points)
+
+        if two_axis:
+            x = np.linspace(-lim, lim, nr_points)
+        return x, z
+
+    @staticmethod
+    def mm_it(x, x_pos):
+        """
+        Takes argument in mm returns position in x-array
+        Args:
+            x: array of interest
+            x_pos: position to find position of
+
+        Returns: int of position of x_pos in array x
+
+        """
+        precision = len(x)//(2*np.abs(x[0]))
+        it = int(len(x)//2 + precision * x_pos)
+        return it
+
     @staticmethod
     def k_sq(R_loop, z_loc, r, z):
         """ Argument for elliptic integrals"""
         return (4 * R_loop * r) / ((R_loop + r) ** 2 + (z - z_loc) ** 2)
 
     @staticmethod
-    def B_z_loop(I_current, R_loop, z_loc, r, z):
-        """calculate z-component of B-field at position r and z for each individual loop"""
-        B_z = 2e-7 * I_current * 1 / ((R_loop + r) ** 2 + (z - z_loc) ** 2) ** (1 / 2) * (
-                sp.ellipk(BCoil.k_sq(R_loop, z_loc, r, z)) + sp.ellipe(BCoil.k_sq(R_loop, z_loc, r, z)) * (
-                R_loop ** 2 - r ** 2 - (z - z_loc) ** 2) / ((R_loop - r) ** 2 + (z - z_loc) ** 2))
+    def __B_z_loop(I_current, r_loop, z_loop, r_pos, z_pos):
+        """
+        calculate z-component of B-field at position r and z for each individual loop
+        Args:
+            I_current: Current in [A]
+            r_loop: Radial position of current loop
+            z_loop: Axial position of current loop along symmetry axis
+            r_pos: radial position of calculation in [m]
+            z_pos: axial position of calculation in [m]
+
+        Returns: z component of B-field at position r, z in G
+
+        """
+        B_z = 2e-7 * I_current * 1 / ((r_loop + r_pos) ** 2 + (z_pos - z_loop) ** 2) ** (1 / 2) * (
+                sp.ellipk(BCoil.k_sq(r_loop, z_loop, r_pos, z_pos)) + sp.ellipe(BCoil.k_sq(r_loop, z_loop, r_pos, z_pos)) * (
+                r_loop ** 2 - r_pos ** 2 - (z_pos - z_loop) ** 2) / ((r_loop - r_pos) ** 2 + (z_pos - z_loop) ** 2))
         B_z *= 1e4  # conversion to gauss
         return B_z
 
     @staticmethod
-    def B_r_loop(I_current, R_loop, z_loc, r, z):
-        """calculate r-component of B-field at position r and z for each individual loop"""
-        B_r = 2e-7 * I_current / r * (z - z_loc) / ((R_loop + r) ** 2 + (z - z_loc) ** 2) ** (1 / 2) * (
-                -sp.ellipk(BCoil.k_sq(R_loop, z_loc, r, z)) + sp.ellipe(BCoil.k_sq(R_loop, z_loc, r, z)) * (
-                R_loop ** 2 + r ** 2 + (z - z_loc) ** 2) / ((R_loop - r) ** 2 + (z - z_loc) ** 2))
+    def __B_r_loop(I_current, r_loop, z_loop, r_pos, z_pos):
+        """
+         calculate z-component of B-field at position r and z for each individual loop
+         Args:
+             I_current: Current in [A]
+             r_loop: Radial position of current loop
+             z_loop: Axial position of current loop along symmetry axis
+             r_pos: radial position of calculation in [m]
+             z_pos: axial position of calculation in [m]
+
+         Returns: z component of B-field at position r, z in G
+
+         """
+        B_r = 2e-7 * I_current / r_pos * (z_pos - z_loop) / ((r_loop + r_pos) ** 2 + (z_pos - z_loop) ** 2) ** (1 / 2) * (
+                -sp.ellipk(BCoil.k_sq(r_loop, z_loop, r_pos, z_pos)) + sp.ellipe(BCoil.k_sq(r_loop, z_loop, r_pos, z_pos)) * (
+                r_loop ** 2 + r_pos ** 2 + (z_pos - z_loop) ** 2) / ((r_loop - r_pos) ** 2 + (z_pos - z_loop) ** 2))
         B_r *= 1e4  # conversion to gauss
         return B_r
 
-    def B_field(self, I_current, x, z, raster=10):
+    def B_field_z(self,I_current):
+        pass
+
+    def B_field(self, I_current, x, z, raster = 7):
         """
         Returns Bz along z-axis and B_x along x-axis,
         HH = +1 --> Helmholtz configuration, HH = -1 --> Anti Helmholtz configuration
@@ -380,11 +439,11 @@ class BCoil:
                 z_pos = calc_raster[wire, ii, 0]
                 r_pos = calc_raster[wire, ii, 1]
 
-                B_z += BCoil.B_z_loop(I_current, r_pos, z_pos, 0, z_SI) + BCoil.B_z_loop(self.HH * I_current,
-                                                                                         r_pos, -z_pos, 0, z_SI)
-                B_x_pos += BCoil.B_r_loop(I_current, r_pos, z_pos, x_positive, 0) + BCoil.B_r_loop(
+                B_z += BCoil.__B_z_loop(I_current, r_pos, z_pos, 0, z_SI) + BCoil.__B_z_loop(self.HH * I_current, r_pos,
+                                                                                             -z_pos, 0, z_SI)
+                B_x_pos += BCoil.__B_r_loop(I_current, r_pos, z_pos, x_positive, 0) + BCoil.__B_r_loop(
                     self.HH * I_current, r_pos, -z_pos, x_positive, 0)
-                B_x_neg += BCoil.B_r_loop(I_current, r_pos, z_pos, x_negative, 0) + BCoil.B_r_loop(
+                B_x_neg += BCoil.__B_r_loop(I_current, r_pos, z_pos, x_negative, 0) + BCoil.__B_r_loop(
                     self.HH * I_current, r_pos, -z_pos, x_negative, 0)
 
         B_x_neg *= -1  # B_x_neg is pointing in opposite x_direction
@@ -393,7 +452,7 @@ class BCoil:
         # print(f"time = {end - start} s")
         return B_z, B_x
 
-    def max_field(self, I_current,raster = 7):
+    def max_field(self, I_current, raster = 7):
         B_z_0 = 0
         calc_raster = self.full_raster(raster)
 
@@ -410,10 +469,11 @@ class BCoil:
                 z_pos = calc_raster[wire, ii, 0]
                 r_pos = calc_raster[wire, ii, 1]
 
-                B_z_0 += BCoil.B_z_loop(I_current, r_pos, z_pos, 0, 0) + BCoil.B_z_loop(self.HH * I_current,
-                                                                                        r_pos, -z_pos, 0, 0)
+                B_z_0 += BCoil.__B_z_loop(I_current, r_pos, z_pos, 0, 0) + BCoil.__B_z_loop(self.HH * I_current, r_pos,
+                                                                                            -z_pos, 0, 0)
         return B_z_0
 
+
     def B_tot_along_axis(self, I_current, x, z, raster=10):
         """
         return B_tot_z, B_tot_x
@@ -453,17 +513,19 @@ class BCoil:
                 r_pos = calc_raster[wire, ii, 1]
 
                 # z-field along z-axis (x-Field always zero)
-                B_tot_z += BCoil.B_z_loop(I_current, r_pos, z_pos, 0, z_SI) + BCoil.B_z_loop(
-                    self.HH * I_current, r_pos, -z_pos, 0, z_SI)
+                B_tot_z += BCoil.__B_z_loop(I_current, r_pos, z_pos, 0, z_SI) + BCoil.__B_z_loop(self.HH * I_current,
+                                                                                                 r_pos, -z_pos, 0, z_SI)
 
                 # x-field along x-axis
-                B_x_pos += BCoil.B_r_loop(I_current, r_pos, z_pos, x_pos, 0) + BCoil.B_r_loop(
-                    self.HH * I_current, r_pos, -z_pos, x_pos, 0)
-                B_x_neg += BCoil.B_r_loop(I_current, r_pos, z_pos, x_neg, 0) + BCoil.B_r_loop(
-                    self.HH * I_current, r_pos, -z_pos, x_neg, 0)
+                B_x_pos += BCoil.__B_r_loop(I_current, r_pos, z_pos, x_pos, 0) + BCoil.__B_r_loop(self.HH * I_current,
+                                                                                                  r_pos, -z_pos, x_pos,
+                                                                                                  0)
+                B_x_neg += BCoil.__B_r_loop(I_current, r_pos, z_pos, x_neg, 0) + BCoil.__B_r_loop(self.HH * I_current,
+                                                                                                  r_pos, -z_pos, x_neg,
+                                                                                                  0)
                 # Bz along x-axis:
-                B_z_x += BCoil.B_z_loop(I_current, r_pos, z_pos, x_SI, 0) + BCoil.B_z_loop(self.HH * I_current,
-                                                                                           r_pos, -z_pos, x_SI, 0)
+                B_z_x += BCoil.__B_z_loop(I_current, r_pos, z_pos, x_SI, 0) + BCoil.__B_z_loop(self.HH * I_current,
+                                                                                               r_pos, -z_pos, x_SI, 0)
 
         B_x_neg *= -1  # B_x_neg is pointing in opposite x_direction
 
@@ -499,18 +561,16 @@ class BCoil:
                     r_pos = calc_raster[wire, ii, 1]
 
                     # compute z-value of field
-                    B[:, el, 1] += BCoil.B_z_loop(I_current, r_pos, z_pos, np.abs(x_SI[el]),
-                                                  z_SI) + BCoil.B_z_loop(self.HH * I_current, r_pos, -z_pos,
-                                                                         np.abs(x_SI[el]), z_SI)
+                    B[:, el, 1] += BCoil.__B_z_loop(I_current, r_pos, z_pos, np.abs(x_SI[el]), z_SI) + BCoil.__B_z_loop(
+                        self.HH * I_current, r_pos, -z_pos, np.abs(x_SI[el]), z_SI)
 
                     # compute x-value
                     if x_SI[el] < 0:
-                        B[:, el, 0] -= BCoil.B_r_loop(I_current, r_pos, z_pos, -x_SI[el],
-                                                      z_SI) + BCoil.B_r_loop(self.HH * I_current, r_pos, -z_pos,
-                                                                             -x_SI[el], z_SI)
+                        B[:, el, 0] -= BCoil.__B_r_loop(I_current, r_pos, z_pos, -x_SI[el], z_SI) + BCoil.__B_r_loop(
+                            self.HH * I_current, r_pos, -z_pos, -x_SI[el], z_SI)
 
                     elif x_SI[el] > 0:
-                        B[:, el, 0] += BCoil.B_r_loop(I_current, r_pos, z_pos, x_SI[el], z_SI) + BCoil.B_r_loop(
+                        B[:, el, 0] += BCoil.__B_r_loop(I_current, r_pos, z_pos, x_SI[el], z_SI) + BCoil.__B_r_loop(
                             self.HH * I_current, r_pos, -z_pos, x_SI[el], z_SI)
 
                     elif x_SI[el] == 0:
@@ -524,18 +584,19 @@ class BCoil:
 
     def plot_3d(self, I_current, x_lim, z_lim):
         x = np.arange(-x_lim, x_lim, 5)
+        print(x)
         z = np.arange(-z_lim, z_lim, 5)
+        print(z)
         x_m, z_m = np.meshgrid(x, z)
         if self.is_round:
             B = self.B_multiple_3d(I_current, x, z, raster=3)
         else:
             B = self.B_multiple_3d(I_current, x, z, raster=2)
         B_tot = BCoil.B_tot_3d(B)
-
         for xx in range(0, len(x)):
             for zz in range(0, len(z)):
-                if B_tot[xx, zz] > 15:
-                    B[xx, zz, :] /= B_tot[xx, zz] / 15
+                if B_tot[zz, xx] > 15:
+                    B[zz, xx, :] /= B_tot[zz, xx] / 15
 
         plt.figure(33)
         plt.quiver(x_m, z_m, B[:, :, 0], B[:, :, 1])
@@ -659,8 +720,13 @@ class BCoil:
 
         Power = self.power(I_current, T)
 
+        Voltage = self.resistance(T) * I_current
+
+        print("")
+        print("Cooling:")
         print(f"    current density = {j_dens} A/mm^2")
         print(f"    Power = {Power} W")
+        print(f"    U = {Voltage} V")
 
     def power(self, I_current, T):
         P = self.resistance(T) * I_current ** 2

src/physical_constants.py

@@ -29,3 +29,6 @@ lambda_626 = 626.082e-9
 rho_copper_20 = 1.68e-8
 density_copper = 8.940e3
 
+# water
+water_dens = 999.78  # kg/m^3
+water_c_p = 4190  # J/kg*K