text: from numpy import sqrt
  
  
  def _comp_R0(self):
      """Compute the radius of the circle
  
      Parameters
      ----------
      self : SlotCirc
          A SlotCirc object
  
      Returns
      -------
      R0 : float
          Radius of the circle [m]
      """
  
      # R0 is the radius of the circle
      # Pythagore in Triangle: Center, Z2, middle(Z1,Z2)
      # R0**2 = (W0/2)**2 + (H0-R0)**2
  
      return ((self.W0 / 2) ** 2 + self.H0 ** 2) / (2 * self.H0)
  