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more reliable way of taking the sqrt of a complex number in defn of k

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Lindsey
2015-06-04 16:12:58 -07:00
parent 1240d65eaf
commit 678d8611d8
1 changed files with 4 additions and 1 deletions
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simpegEM/Utils/EMUtils.py
+4 -1
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@@ -7,8 +7,11 @@ def omega(freq):
return 2.*np.pi*freq
def k(freq, sigma, mu=mu_0, eps=epsilon_0):
""" Eq 1.47 - 1.49 in Ward and Hohmann """
w = omega(freq)
return np.sqrt(mu * eps * w**2 - 1j * w* mu * sigma)
alp = w * np.sqrt( mu*eps/2 * ( np.sqrt(1. + (sigma / (eps*w))**2 ) + 1) )
beta = w * np.sqrt( mu*eps/2 * ( np.sqrt(1. + (sigma / (eps*w))**2 ) - 1) )
return alp - 1j*beta
# Constitutive relations
def e_from_j(prob,j):