Deuterium atom exposure of self-damaged tungsten#

🏷 Tags: 1D kinetic surface model NRA transient

This validation case is NRA measurements of D in self-damaged W performed by Markelj et al. [25].

The experimental procedure included three main phases. A high-purity polycrystalline W sample of 0.8 mm thickness was pre-damaged with 20 MeV W ions. The pre-damaged sample was then exposed to low-energy (~0.3 eV) D atomic flux of \(5.8\times 10^{18}\,\textrm{m}^{-2}\textrm{s}^{-1}\) at 600 K. The exposure continued until the D fluence of \(1\times 10^{24}\,\mathrm{m}^{-2}\) was reached. Finally, an isothermal desorption of D for 43 h. at 600 K was conducted.

The FESTIM model is based on the approach of Hodille et al. [26]. Only isothermal D exposure and desorption phases are simulated omitting intermediate cooling/re-heating steps. For the surface processes, adsorption of low-energy atoms, desorption of molecules (Langmuir-Hinshelwood recombination), and recombination of an adsorbed atom with an incident atom (Eley-Rideal recombination) are considered.

The D diffusivity in W is defined by scaling the corresponding value for H (Fernandez et al. [24]) by a factor of \(1/\sqrt{2}\). Five types of trapping sites are included to reproduce the experimental data: two intrinsic traps and three extrinsic traps with sigmoidal distribution (\(f\)) within the damaged layer:

\[ f(x)=\dfrac{1}{1+\exp\left(\dfrac{x-x_0}{\Delta x}\right)}, \]

where \(x_0=2.2\,\mu\textrm{m}\), \(\Delta x=0.154\,\mu\textrm{m}\).

The FESTIM results are compared to the experimental data and the results of MHIMS simulation, both taken from [26].

FESTIM model#

Hide code cell source
import festim as F
import fenics as f
import numpy as np
import sympy as sp
import h_transport_materials as htm

################### PARAMETERS ###################
# Exposure conditions
Gamma_atom = 5.8e18
T_exposure = 600
t_exposure = 1e24 / Gamma_atom
t_des = 52 * 3600
final_time = t_exposure + t_des

# Sample
L = 0.8e-3  # half thickness, m

# W properties
rho_W = 6.3e28  # W atomic concentration, m^-3
n_IS = 6 * rho_W  # concentration of interstitial sites, m^-3
n_surf = 6.9 * rho_W ** (2 / 3)  # concentration of adsorption sites, m^-2
nu0 = 1e13  # attempt frequency, s^-1
SP = 0.19

D_H = htm.diffusivities.filter(material=htm.Tungsten, author="fernandez")[0]
D0 = D_H.pre_exp.magnitude / np.sqrt(2)  # diffusivity pre-factor, m^2 s^-1
E_diff = D_H.act_energy.magnitude  # diffusion activation energy, eV

lambda_IS = 110e-12  # distance between 2 IS sites, m
sigma_exc = 1.7e-21  # Cross-section for the direct abstraction, m^2
lambda_des = 1 / np.sqrt(n_surf)

# Transitions
E_bs = E_diff  # energy barrier from bulk to surface, eV
E_sb = 1.545
E_des = 0.87


################### FUNCTIONS ###############
def k_sb(T, surf_conc, t):
    return nu0 * f.exp(-E_sb / F.k_B / T)


def k_bs(T, surf_conc, t):
    return nu0 * f.exp(-E_bs / F.k_B / T)


def J_vs_left(T, surf_conc, t):
    G_atom = Gamma_atom * f.conditional(t <= t_exposure, 1, 0)

    phi_atom = SP * G_atom * (1 - surf_conc / n_surf)

    phi_exc = G_atom * sigma_exc * surf_conc

    phi_des = 2 * nu0 * (lambda_des * surf_conc) ** 2 * f.exp(-2 * E_des / F.k_B / T)
    return phi_atom - phi_exc - phi_des


def J_vs_right(T, surf_conc, t):
    phi_des = 2 * nu0 * (lambda_des * surf_conc) ** 2 * f.exp(-2 * E_des / F.k_B / T)
    return -phi_des


################### MODEL ###################

W_model = F.Simulation(log_level=40)

# Mesh
vertices = np.concatenate(
    [
        np.linspace(0, 5e-8, num=100),
        np.linspace(5e-8, 5e-6, num=400),
        np.linspace(5e-6, L, num=500),
    ]
)

W_model.mesh = F.MeshFromVertices(vertices)

# Materials
tungsten = F.Material(id=1, D_0=D0, E_D=E_diff)
W_model.materials = tungsten

distr = 1 / (1 + sp.exp((F.x - 2.2e-6) / 1.54e-7))

traps = F.Traps(
    [
        F.Trap(
            k_0=D0 / (n_IS * lambda_IS**2),
            E_k=E_diff,
            p_0=nu0,
            E_p=0.85,
            density=1e-4 * rho_W,
            materials=tungsten,
        ),
        F.Trap(
            k_0=D0 / (n_IS * lambda_IS**2),
            E_k=E_diff,
            p_0=nu0,
            E_p=1.00,
            density=1e-4 * rho_W,
            materials=tungsten,
        ),
        F.Trap(
            k_0=D0 / (n_IS * lambda_IS**2),
            E_k=E_diff,
            p_0=nu0,
            E_p=1.65,
            density=0.19e-2 * rho_W * distr,
            materials=tungsten,
        ),
        F.Trap(
            k_0=D0 / (n_IS * lambda_IS**2),
            E_k=E_diff,
            p_0=nu0,
            E_p=1.85,
            density=0.16e-2 * rho_W * distr,
            materials=tungsten,
        ),
        F.Trap(
            k_0=D0 / (n_IS * lambda_IS**2),
            E_k=E_diff,
            p_0=nu0,
            E_p=2.06,
            density=0.02e-2 * rho_W * distr,
            materials=tungsten,
        ),
    ]
)
W_model.traps = traps

W_model.T = T_exposure

BC_left = F.SurfaceKinetics(
    k_sb=k_sb,
    k_bs=k_bs,
    lambda_IS=lambda_IS,
    n_surf=n_surf,
    n_IS=n_IS,
    J_vs=J_vs_left,
    surfaces=1,
    initial_condition=0,
    t=F.t,
)

BC_right = F.SurfaceKinetics(
    k_sb=k_sb,
    k_bs=k_bs,
    lambda_IS=lambda_IS,
    n_surf=n_surf,
    n_IS=n_IS,
    J_vs=J_vs_right,
    surfaces=2,
    initial_condition=0,
    t=F.t,
)

W_model.boundary_conditions = [BC_left, BC_right]

# Exports
export_fluences = [
    5.22e22,
    1.25e23,
    4.8e23,
    6.3e23,
    1e24,
]

export_times = [fluence / Gamma_atom for fluence in export_fluences]

export_times += [export_times[-1] + 20 * 3600, export_times[-1] + 52 * 3600]

derived_quantities = F.DerivedQuantities(
    [
        F.TotalVolume(field="retention", volume=1),
        F.AdsorbedHydrogen(surface=1),
        F.AdsorbedHydrogen(surface=2),
    ],
    show_units=True,
)

TXT = F.TXTExport(field="retention", filename="./FESTIM_sim.txt", times=export_times)

W_model.exports = [derived_quantities] + [TXT]

W_model.dt = F.Stepsize(
    initial_value=1e-5,
    stepsize_change_ratio=1.25,
    max_stepsize=500,
    dt_min=1e-6,
    milestones=export_times,
)

W_model.settings = F.Settings(
    absolute_tolerance=1e7,
    relative_tolerance=1e-13,
    final_time=final_time,
    traps_element_type="DG",
)

W_model.initialise()
W_model.run()
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16.4 %        5.9e+04 s    Elapsed time so far: 56.6 s
16.6 %        6.0e+04 s    Elapsed time so far: 56.8 s
16.7 %        6.0e+04 s    Elapsed time so far: 57.1 s
16.8 %        6.1e+04 s    Elapsed time so far: 57.4 s
17.0 %        6.1e+04 s    Elapsed time so far: 57.6 s
17.1 %        6.2e+04 s    Elapsed time so far: 57.9 s
17.3 %        6.2e+04 s    Elapsed time so far: 58.1 s
17.4 %        6.3e+04 s    Elapsed time so far: 58.4 s
17.5 %        6.3e+04 s    Elapsed time so far: 58.6 s
17.7 %        6.4e+04 s    Elapsed time so far: 58.9 s
17.8 %        6.4e+04 s    Elapsed time so far: 59.1 s
17.9 %        6.5e+04 s    Elapsed time so far: 59.3 s
18.1 %        6.5e+04 s    Elapsed time so far: 59.6 s
18.2 %        6.6e+04 s    Elapsed time so far: 59.9 s
18.4 %        6.6e+04 s    Elapsed time so far: 60.1 s
18.5 %        6.7e+04 s    Elapsed time so far: 60.4 s
18.6 %        6.7e+04 s    Elapsed time so far: 60.6 s
18.8 %        6.8e+04 s    Elapsed time so far: 60.9 s
18.9 %        6.8e+04 s    Elapsed time so far: 61.1 s
19.1 %        6.9e+04 s    Elapsed time so far: 61.4 s
19.2 %        6.9e+04 s    Elapsed time so far: 61.7 s
19.3 %        7.0e+04 s    Elapsed time so far: 61.9 s
19.5 %        7.0e+04 s    Elapsed time so far: 62.2 s
19.6 %        7.1e+04 s    Elapsed time so far: 62.4 s
19.8 %        7.1e+04 s    Elapsed time so far: 62.7 s
19.9 %        7.2e+04 s    Elapsed time so far: 62.9 s
20.0 %        7.2e+04 s    Elapsed time so far: 63.2 s
20.2 %        7.3e+04 s    Elapsed time so far: 63.4 s
20.3 %        7.3e+04 s    Elapsed time so far: 63.7 s
20.4 %        7.4e+04 s    Elapsed time so far: 63.9 s
20.6 %        7.4e+04 s    Elapsed time so far: 64.2 s
20.7 %        7.5e+04 s    Elapsed time so far: 64.5 s
20.9 %        7.5e+04 s    Elapsed time so far: 64.7 s
21.0 %        7.6e+04 s    Elapsed time so far: 65.0 s
21.1 %        7.6e+04 s    Elapsed time so far: 65.2 s
21.3 %        7.7e+04 s    Elapsed time so far: 65.5 s
21.4 %        7.7e+04 s    Elapsed time so far: 65.7 s
21.6 %        7.8e+04 s    Elapsed time so far: 66.0 s
21.7 %        7.8e+04 s    Elapsed time so far: 66.3 s
21.8 %        7.9e+04 s    Elapsed time so far: 66.5 s
22.0 %        7.9e+04 s    Elapsed time so far: 66.8 s
22.1 %        8.0e+04 s    Elapsed time so far: 67.0 s
22.3 %        8.0e+04 s    Elapsed time so far: 67.2 s
22.4 %        8.1e+04 s    Elapsed time so far: 67.5 s
22.5 %        8.1e+04 s    Elapsed time so far: 67.7 s
22.7 %        8.2e+04 s    Elapsed time so far: 68.0 s
22.8 %        8.2e+04 s    Elapsed time so far: 68.2 s
23.0 %        8.3e+04 s    Elapsed time so far: 68.5 s
23.0 %        8.3e+04 s    Elapsed time so far: 68.8 s
23.1 %        8.3e+04 s    Elapsed time so far: 69.1 s
23.2 %        8.3e+04 s    Elapsed time so far: 69.3 s
23.3 %        8.4e+04 s    Elapsed time so far: 69.5 s
23.4 %        8.4e+04 s    Elapsed time so far: 69.8 s
23.6 %        8.5e+04 s    Elapsed time so far: 70.0 s
23.7 %        8.5e+04 s    Elapsed time so far: 70.3 s
23.8 %        8.6e+04 s    Elapsed time so far: 70.6 s
24.0 %        8.6e+04 s    Elapsed time so far: 70.8 s
24.1 %        8.7e+04 s    Elapsed time so far: 71.0 s
24.3 %        8.7e+04 s    Elapsed time so far: 71.3 s
24.4 %        8.8e+04 s    Elapsed time so far: 71.5 s
24.5 %        8.8e+04 s    Elapsed time so far: 71.8 s
24.7 %        8.9e+04 s    Elapsed time so far: 72.0 s
24.8 %        8.9e+04 s    Elapsed time so far: 72.3 s
25.0 %        9.0e+04 s    Elapsed time so far: 72.6 s
25.1 %        9.0e+04 s    Elapsed time so far: 72.8 s
25.2 %        9.1e+04 s    Elapsed time so far: 73.1 s
25.4 %        9.1e+04 s    Elapsed time so far: 73.3 s
25.5 %        9.2e+04 s    Elapsed time so far: 73.6 s
25.6 %        9.2e+04 s    Elapsed time so far: 73.9 s
25.8 %        9.3e+04 s    Elapsed time so far: 74.1 s
25.9 %        9.3e+04 s    Elapsed time so far: 74.4 s
26.1 %        9.4e+04 s    Elapsed time so far: 74.6 s
26.2 %        9.4e+04 s    Elapsed time so far: 74.9 s
26.4 %        9.5e+04 s    Elapsed time so far: 75.1 s
26.5 %        9.5e+04 s    Elapsed time so far: 75.4 s
26.6 %        9.6e+04 s    Elapsed time so far: 75.6 s
26.8 %        9.6e+04 s    Elapsed time so far: 75.9 s
26.9 %        9.7e+04 s    Elapsed time so far: 76.2 s
27.0 %        9.7e+04 s    Elapsed time so far: 76.4 s
27.2 %        9.8e+04 s    Elapsed time so far: 76.7 s
27.3 %        9.8e+04 s    Elapsed time so far: 76.9 s
27.5 %        9.9e+04 s    Elapsed time so far: 77.2 s
27.6 %        9.9e+04 s    Elapsed time so far: 77.4 s
27.7 %        1.0e+05 s    Elapsed time so far: 77.7 s
27.9 %        1.0e+05 s    Elapsed time so far: 77.9 s
28.0 %        1.0e+05 s    Elapsed time so far: 78.2 s
28.1 %        1.0e+05 s    Elapsed time so far: 78.4 s
28.3 %        1.0e+05 s    Elapsed time so far: 78.7 s
28.4 %        1.0e+05 s    Elapsed time so far: 79.0 s
28.6 %        1.0e+05 s    Elapsed time so far: 79.2 s
28.7 %        1.0e+05 s    Elapsed time so far: 79.5 s
28.9 %        1.0e+05 s    Elapsed time so far: 79.7 s
29.0 %        1.0e+05 s    Elapsed time so far: 80.0 s
29.1 %        1.0e+05 s    Elapsed time so far: 80.2 s
29.3 %        1.1e+05 s    Elapsed time so far: 80.5 s
29.4 %        1.1e+05 s    Elapsed time so far: 80.7 s
29.5 %        1.1e+05 s    Elapsed time so far: 81.0 s
29.7 %        1.1e+05 s    Elapsed time so far: 81.2 s
29.8 %        1.1e+05 s    Elapsed time so far: 81.5 s
30.0 %        1.1e+05 s    Elapsed time so far: 81.8 s
30.1 %        1.1e+05 s    Elapsed time so far: 82.0 s
30.2 %        1.1e+05 s    Elapsed time so far: 82.3 s
30.3 %        1.1e+05 s    Elapsed time so far: 82.6 s
30.5 %        1.1e+05 s    Elapsed time so far: 82.9 s
30.6 %        1.1e+05 s    Elapsed time so far: 83.1 s
30.8 %        1.1e+05 s    Elapsed time so far: 83.3 s
30.9 %        1.1e+05 s    Elapsed time so far: 83.6 s
31.0 %        1.1e+05 s    Elapsed time so far: 83.8 s
31.2 %        1.1e+05 s    Elapsed time so far: 84.1 s
31.3 %        1.1e+05 s    Elapsed time so far: 84.3 s
31.4 %        1.1e+05 s    Elapsed time so far: 84.6 s
31.6 %        1.1e+05 s    Elapsed time so far: 84.9 s
31.7 %        1.1e+05 s    Elapsed time so far: 85.1 s
31.9 %        1.1e+05 s    Elapsed time so far: 85.4 s
32.0 %        1.2e+05 s    Elapsed time so far: 85.7 s
32.1 %        1.2e+05 s    Elapsed time so far: 85.9 s
32.3 %        1.2e+05 s    Elapsed time so far: 86.2 s
32.4 %        1.2e+05 s    Elapsed time so far: 86.4 s
32.6 %        1.2e+05 s    Elapsed time so far: 86.7 s
32.7 %        1.2e+05 s    Elapsed time so far: 87.0 s
32.8 %        1.2e+05 s    Elapsed time so far: 87.2 s
33.0 %        1.2e+05 s    Elapsed time so far: 87.5 s
33.1 %        1.2e+05 s    Elapsed time so far: 87.7 s
33.3 %        1.2e+05 s    Elapsed time so far: 88.0 s
33.4 %        1.2e+05 s    Elapsed time so far: 88.3 s
33.5 %        1.2e+05 s    Elapsed time so far: 88.5 s
33.7 %        1.2e+05 s    Elapsed time so far: 88.8 s
33.8 %        1.2e+05 s    Elapsed time so far: 89.0 s
34.0 %        1.2e+05 s    Elapsed time so far: 89.2 s
34.1 %        1.2e+05 s    Elapsed time so far: 89.5 s
34.2 %        1.2e+05 s    Elapsed time so far: 89.7 s
34.4 %        1.2e+05 s    Elapsed time so far: 90.0 s
34.5 %        1.2e+05 s    Elapsed time so far: 90.2 s
34.6 %        1.2e+05 s    Elapsed time so far: 90.5 s
34.8 %        1.3e+05 s    Elapsed time so far: 90.8 s
34.9 %        1.3e+05 s    Elapsed time so far: 91.0 s
35.1 %        1.3e+05 s    Elapsed time so far: 91.3 s
35.2 %        1.3e+05 s    Elapsed time so far: 91.5 s
35.3 %        1.3e+05 s    Elapsed time so far: 91.8 s
35.5 %        1.3e+05 s    Elapsed time so far: 92.0 s
35.6 %        1.3e+05 s    Elapsed time so far: 92.3 s
35.8 %        1.3e+05 s    Elapsed time so far: 92.6 s
35.9 %        1.3e+05 s    Elapsed time so far: 92.8 s
36.0 %        1.3e+05 s    Elapsed time so far: 93.0 s
36.2 %        1.3e+05 s    Elapsed time so far: 93.3 s
36.3 %        1.3e+05 s    Elapsed time so far: 93.5 s
36.5 %        1.3e+05 s    Elapsed time so far: 93.8 s
36.6 %        1.3e+05 s    Elapsed time so far: 94.0 s
36.7 %        1.3e+05 s    Elapsed time so far: 94.3 s
36.9 %        1.3e+05 s    Elapsed time so far: 94.6 s
37.0 %        1.3e+05 s    Elapsed time so far: 94.8 s
37.1 %        1.3e+05 s    Elapsed time so far: 95.1 s
37.3 %        1.3e+05 s    Elapsed time so far: 95.3 s
37.4 %        1.3e+05 s    Elapsed time so far: 95.6 s
37.6 %        1.4e+05 s    Elapsed time so far: 95.8 s
37.7 %        1.4e+05 s    Elapsed time so far: 96.1 s
37.8 %        1.4e+05 s    Elapsed time so far: 96.3 s
38.0 %        1.4e+05 s    Elapsed time so far: 96.6 s
38.1 %        1.4e+05 s    Elapsed time so far: 96.8 s
38.3 %        1.4e+05 s    Elapsed time so far: 97.0 s
38.4 %        1.4e+05 s    Elapsed time so far: 97.3 s
38.5 %        1.4e+05 s    Elapsed time so far: 97.5 s
38.7 %        1.4e+05 s    Elapsed time so far: 97.8 s
38.8 %        1.4e+05 s    Elapsed time so far: 98.0 s
39.0 %        1.4e+05 s    Elapsed time so far: 98.3 s
39.1 %        1.4e+05 s    Elapsed time so far: 98.6 s
39.2 %        1.4e+05 s    Elapsed time so far: 98.8 s
39.4 %        1.4e+05 s    Elapsed time so far: 99.1 s
39.5 %        1.4e+05 s    Elapsed time so far: 99.3 s
39.6 %        1.4e+05 s    Elapsed time so far: 99.6 s
39.8 %        1.4e+05 s    Elapsed time so far: 99.9 s
39.9 %        1.4e+05 s    Elapsed time so far: 100.1 s
40.1 %        1.4e+05 s    Elapsed time so far: 100.4 s
40.2 %        1.4e+05 s    Elapsed time so far: 100.6 s
40.4 %        1.5e+05 s    Elapsed time so far: 100.9 s
40.5 %        1.5e+05 s    Elapsed time so far: 101.1 s
40.6 %        1.5e+05 s    Elapsed time so far: 101.3 s
40.8 %        1.5e+05 s    Elapsed time so far: 101.6 s
40.9 %        1.5e+05 s    Elapsed time so far: 101.9 s
41.0 %        1.5e+05 s    Elapsed time so far: 102.1 s
41.2 %        1.5e+05 s    Elapsed time so far: 102.4 s
41.3 %        1.5e+05 s    Elapsed time so far: 102.6 s
41.5 %        1.5e+05 s    Elapsed time so far: 102.9 s
41.6 %        1.5e+05 s    Elapsed time so far: 103.1 s
41.7 %        1.5e+05 s    Elapsed time so far: 103.3 s
41.9 %        1.5e+05 s    Elapsed time so far: 103.6 s
42.0 %        1.5e+05 s    Elapsed time so far: 103.8 s
42.1 %        1.5e+05 s    Elapsed time so far: 104.1 s
42.3 %        1.5e+05 s    Elapsed time so far: 104.3 s
42.4 %        1.5e+05 s    Elapsed time so far: 104.6 s
42.6 %        1.5e+05 s    Elapsed time so far: 104.9 s
42.7 %        1.5e+05 s    Elapsed time so far: 105.0 s
42.9 %        1.5e+05 s    Elapsed time so far: 105.2 s
43.0 %        1.5e+05 s    Elapsed time so far: 105.5 s
43.1 %        1.6e+05 s    Elapsed time so far: 105.8 s
43.3 %        1.6e+05 s    Elapsed time so far: 106.0 s
43.4 %        1.6e+05 s    Elapsed time so far: 106.3 s
43.5 %        1.6e+05 s    Elapsed time so far: 106.6 s
43.7 %        1.6e+05 s    Elapsed time so far: 106.8 s
43.8 %        1.6e+05 s    Elapsed time so far: 107.1 s
44.0 %        1.6e+05 s    Elapsed time so far: 107.3 s
44.1 %        1.6e+05 s    Elapsed time so far: 107.6 s
44.2 %        1.6e+05 s    Elapsed time so far: 107.8 s
44.4 %        1.6e+05 s    Elapsed time so far: 108.1 s
44.5 %        1.6e+05 s    Elapsed time so far: 108.4 s
44.7 %        1.6e+05 s    Elapsed time so far: 108.6 s
44.8 %        1.6e+05 s    Elapsed time so far: 108.9 s
44.9 %        1.6e+05 s    Elapsed time so far: 109.1 s
45.1 %        1.6e+05 s    Elapsed time so far: 109.4 s
45.2 %        1.6e+05 s    Elapsed time so far: 109.6 s
45.4 %        1.6e+05 s    Elapsed time so far: 109.9 s
45.5 %        1.6e+05 s    Elapsed time so far: 110.1 s
45.6 %        1.6e+05 s    Elapsed time so far: 110.4 s
45.8 %        1.6e+05 s    Elapsed time so far: 110.7 s
45.9 %        1.7e+05 s    Elapsed time so far: 110.9 s
46.0 %        1.7e+05 s    Elapsed time so far: 111.1 s
46.2 %        1.7e+05 s    Elapsed time so far: 111.4 s
46.3 %        1.7e+05 s    Elapsed time so far: 111.6 s
46.5 %        1.7e+05 s    Elapsed time so far: 111.9 s
46.6 %        1.7e+05 s    Elapsed time so far: 112.1 s
46.7 %        1.7e+05 s    Elapsed time so far: 112.4 s
46.9 %        1.7e+05 s    Elapsed time so far: 112.7 s
47.0 %        1.7e+05 s    Elapsed time so far: 112.9 s
47.2 %        1.7e+05 s    Elapsed time so far: 113.2 s
47.3 %        1.7e+05 s    Elapsed time so far: 113.4 s
47.4 %        1.7e+05 s    Elapsed time so far: 113.7 s
47.6 %        1.7e+05 s    Elapsed time so far: 114.0 s
47.7 %        1.7e+05 s    Elapsed time so far: 114.2 s
47.9 %        1.7e+05 s    Elapsed time so far: 114.5 s
47.9 %        1.7e+05 s    Elapsed time so far: 114.7 s
48.1 %        1.7e+05 s    Elapsed time so far: 115.1 s
48.1 %        1.7e+05 s    Elapsed time so far: 115.4 s
48.3 %        1.7e+05 s    Elapsed time so far: 115.8 s
48.4 %        1.7e+05 s    Elapsed time so far: 116.1 s
48.5 %        1.7e+05 s    Elapsed time so far: 116.4 s
48.7 %        1.8e+05 s    Elapsed time so far: 116.7 s
48.8 %        1.8e+05 s    Elapsed time so far: 116.9 s
49.0 %        1.8e+05 s    Elapsed time so far: 117.1 s
49.1 %        1.8e+05 s    Elapsed time so far: 117.3 s
49.2 %        1.8e+05 s    Elapsed time so far: 117.6 s
49.4 %        1.8e+05 s    Elapsed time so far: 117.8 s
49.5 %        1.8e+05 s    Elapsed time so far: 118.1 s
49.6 %        1.8e+05 s    Elapsed time so far: 118.4 s
49.8 %        1.8e+05 s    Elapsed time so far: 118.6 s
49.9 %        1.8e+05 s    Elapsed time so far: 118.9 s
50.1 %        1.8e+05 s    Elapsed time so far: 119.1 s
50.2 %        1.8e+05 s    Elapsed time so far: 119.4 s
50.3 %        1.8e+05 s    Elapsed time so far: 119.6 s
50.5 %        1.8e+05 s    Elapsed time so far: 119.9 s
50.6 %        1.8e+05 s    Elapsed time so far: 120.1 s
50.8 %        1.8e+05 s    Elapsed time so far: 120.4 s
50.9 %        1.8e+05 s    Elapsed time so far: 120.7 s
51.0 %        1.8e+05 s    Elapsed time so far: 121.1 s
51.2 %        1.8e+05 s    Elapsed time so far: 121.4 s
51.3 %        1.8e+05 s    Elapsed time so far: 121.7 s
51.5 %        1.9e+05 s    Elapsed time so far: 122.0 s
51.6 %        1.9e+05 s    Elapsed time so far: 122.2 s
51.7 %        1.9e+05 s    Elapsed time so far: 122.5 s
51.9 %        1.9e+05 s    Elapsed time so far: 122.7 s
52.0 %        1.9e+05 s    Elapsed time so far: 123.0 s
52.1 %        1.9e+05 s    Elapsed time so far: 123.2 s
52.3 %        1.9e+05 s    Elapsed time so far: 123.5 s
52.4 %        1.9e+05 s    Elapsed time so far: 123.7 s
52.6 %        1.9e+05 s    Elapsed time so far: 124.0 s
52.7 %        1.9e+05 s    Elapsed time so far: 124.2 s
52.9 %        1.9e+05 s    Elapsed time so far: 124.5 s
53.0 %        1.9e+05 s    Elapsed time so far: 124.7 s
53.1 %        1.9e+05 s    Elapsed time so far: 125.0 s
53.3 %        1.9e+05 s    Elapsed time so far: 125.2 s
53.4 %        1.9e+05 s    Elapsed time so far: 125.5 s
53.5 %        1.9e+05 s    Elapsed time so far: 125.8 s
53.7 %        1.9e+05 s    Elapsed time so far: 126.0 s
53.8 %        1.9e+05 s    Elapsed time so far: 126.3 s
54.0 %        1.9e+05 s    Elapsed time so far: 126.6 s
54.1 %        1.9e+05 s    Elapsed time so far: 126.8 s
54.2 %        2.0e+05 s    Elapsed time so far: 127.1 s
54.4 %        2.0e+05 s    Elapsed time so far: 127.3 s
54.5 %        2.0e+05 s    Elapsed time so far: 127.6 s
54.6 %        2.0e+05 s    Elapsed time so far: 127.8 s
54.8 %        2.0e+05 s    Elapsed time so far: 128.1 s
54.9 %        2.0e+05 s    Elapsed time so far: 128.3 s
55.1 %        2.0e+05 s    Elapsed time so far: 128.6 s
55.2 %        2.0e+05 s    Elapsed time so far: 128.9 s
55.4 %        2.0e+05 s    Elapsed time so far: 129.1 s
55.5 %        2.0e+05 s    Elapsed time so far: 129.2 s
55.6 %        2.0e+05 s    Elapsed time so far: 129.5 s
55.8 %        2.0e+05 s    Elapsed time so far: 129.8 s
55.9 %        2.0e+05 s    Elapsed time so far: 130.0 s
56.0 %        2.0e+05 s    Elapsed time so far: 130.3 s
56.2 %        2.0e+05 s    Elapsed time so far: 130.5 s
56.3 %        2.0e+05 s    Elapsed time so far: 130.8 s
56.5 %        2.0e+05 s    Elapsed time so far: 131.0 s
56.6 %        2.0e+05 s    Elapsed time so far: 131.3 s
56.7 %        2.0e+05 s    Elapsed time so far: 131.6 s
56.9 %        2.0e+05 s    Elapsed time so far: 131.8 s
57.0 %        2.1e+05 s    Elapsed time so far: 132.1 s
57.2 %        2.1e+05 s    Elapsed time so far: 132.3 s
57.3 %        2.1e+05 s    Elapsed time so far: 132.6 s
57.4 %        2.1e+05 s    Elapsed time so far: 132.8 s
57.6 %        2.1e+05 s    Elapsed time so far: 133.1 s
57.7 %        2.1e+05 s    Elapsed time so far: 133.4 s
57.9 %        2.1e+05 s    Elapsed time so far: 133.6 s
58.0 %        2.1e+05 s    Elapsed time so far: 133.9 s
58.1 %        2.1e+05 s    Elapsed time so far: 134.1 s
58.3 %        2.1e+05 s    Elapsed time so far: 134.4 s
58.4 %        2.1e+05 s    Elapsed time so far: 134.7 s
58.5 %        2.1e+05 s    Elapsed time so far: 134.9 s
58.7 %        2.1e+05 s    Elapsed time so far: 135.2 s
58.8 %        2.1e+05 s    Elapsed time so far: 135.4 s
59.0 %        2.1e+05 s    Elapsed time so far: 135.7 s
59.1 %        2.1e+05 s    Elapsed time so far: 135.9 s
59.2 %        2.1e+05 s    Elapsed time so far: 136.2 s
59.4 %        2.1e+05 s    Elapsed time so far: 136.4 s
59.5 %        2.1e+05 s    Elapsed time so far: 136.7 s
59.7 %        2.1e+05 s    Elapsed time so far: 137.0 s
59.8 %        2.2e+05 s    Elapsed time so far: 137.2 s
59.9 %        2.2e+05 s    Elapsed time so far: 137.5 s
60.1 %        2.2e+05 s    Elapsed time so far: 137.8 s
60.2 %        2.2e+05 s    Elapsed time so far: 138.0 s
60.4 %        2.2e+05 s    Elapsed time so far: 138.2 s
60.5 %        2.2e+05 s    Elapsed time so far: 138.4 s
60.6 %        2.2e+05 s    Elapsed time so far: 138.6 s
60.8 %        2.2e+05 s    Elapsed time so far: 138.8 s
60.9 %        2.2e+05 s    Elapsed time so far: 139.0 s
61.0 %        2.2e+05 s    Elapsed time so far: 139.2 s
61.2 %        2.2e+05 s    Elapsed time so far: 139.4 s
61.3 %        2.2e+05 s    Elapsed time so far: 139.6 s
61.5 %        2.2e+05 s    Elapsed time so far: 139.8 s
61.6 %        2.2e+05 s    Elapsed time so far: 140.0 s
61.8 %        2.2e+05 s    Elapsed time so far: 140.2 s
61.9 %        2.2e+05 s    Elapsed time so far: 140.4 s
62.0 %        2.2e+05 s    Elapsed time so far: 140.5 s
62.2 %        2.2e+05 s    Elapsed time so far: 140.7 s
62.3 %        2.2e+05 s    Elapsed time so far: 140.9 s
62.4 %        2.2e+05 s    Elapsed time so far: 141.1 s
62.6 %        2.3e+05 s    Elapsed time so far: 141.3 s
62.7 %        2.3e+05 s    Elapsed time so far: 141.5 s
62.9 %        2.3e+05 s    Elapsed time so far: 141.7 s
63.0 %        2.3e+05 s    Elapsed time so far: 141.9 s
63.1 %        2.3e+05 s    Elapsed time so far: 142.1 s
63.3 %        2.3e+05 s    Elapsed time so far: 142.3 s
63.4 %        2.3e+05 s    Elapsed time so far: 142.5 s
63.5 %        2.3e+05 s    Elapsed time so far: 142.7 s
63.7 %        2.3e+05 s    Elapsed time so far: 142.9 s
63.8 %        2.3e+05 s    Elapsed time so far: 143.0 s
64.0 %        2.3e+05 s    Elapsed time so far: 143.2 s
64.1 %        2.3e+05 s    Elapsed time so far: 143.4 s
64.2 %        2.3e+05 s    Elapsed time so far: 143.6 s
64.4 %        2.3e+05 s    Elapsed time so far: 143.8 s
64.5 %        2.3e+05 s    Elapsed time so far: 144.0 s
64.7 %        2.3e+05 s    Elapsed time so far: 144.2 s
64.8 %        2.3e+05 s    Elapsed time so far: 144.4 s
64.9 %        2.3e+05 s    Elapsed time so far: 144.6 s
65.1 %        2.3e+05 s    Elapsed time so far: 144.8 s
65.2 %        2.3e+05 s    Elapsed time so far: 145.0 s
65.4 %        2.4e+05 s    Elapsed time so far: 145.2 s
65.5 %        2.4e+05 s    Elapsed time so far: 145.4 s
65.6 %        2.4e+05 s    Elapsed time so far: 145.6 s
65.8 %        2.4e+05 s    Elapsed time so far: 145.8 s
65.9 %        2.4e+05 s    Elapsed time so far: 145.9 s
66.1 %        2.4e+05 s    Elapsed time so far: 146.1 s
66.2 %        2.4e+05 s    Elapsed time so far: 146.3 s
66.3 %        2.4e+05 s    Elapsed time so far: 146.5 s
66.5 %        2.4e+05 s    Elapsed time so far: 146.7 s
66.6 %        2.4e+05 s    Elapsed time so far: 146.9 s
66.8 %        2.4e+05 s    Elapsed time so far: 147.1 s
66.9 %        2.4e+05 s    Elapsed time so far: 147.2 s
67.0 %        2.4e+05 s    Elapsed time so far: 147.4 s
67.2 %        2.4e+05 s    Elapsed time so far: 147.6 s
67.3 %        2.4e+05 s    Elapsed time so far: 147.8 s
67.5 %        2.4e+05 s    Elapsed time so far: 148.0 s
67.6 %        2.4e+05 s    Elapsed time so far: 148.2 s
67.7 %        2.4e+05 s    Elapsed time so far: 148.4 s
67.9 %        2.4e+05 s    Elapsed time so far: 148.6 s
68.0 %        2.4e+05 s    Elapsed time so far: 148.7 s
68.1 %        2.4e+05 s    Elapsed time so far: 149.0 s
68.2 %        2.5e+05 s    Elapsed time so far: 149.2 s
68.4 %        2.5e+05 s    Elapsed time so far: 149.3 s
68.5 %        2.5e+05 s    Elapsed time so far: 149.5 s
68.7 %        2.5e+05 s    Elapsed time so far: 149.7 s
68.8 %        2.5e+05 s    Elapsed time so far: 149.9 s
68.9 %        2.5e+05 s    Elapsed time so far: 150.1 s
69.1 %        2.5e+05 s    Elapsed time so far: 150.3 s
69.2 %        2.5e+05 s    Elapsed time so far: 150.5 s
69.3 %        2.5e+05 s    Elapsed time so far: 150.7 s
69.5 %        2.5e+05 s    Elapsed time so far: 150.9 s
69.6 %        2.5e+05 s    Elapsed time so far: 151.1 s
69.8 %        2.5e+05 s    Elapsed time so far: 151.3 s
69.9 %        2.5e+05 s    Elapsed time so far: 151.5 s
70.0 %        2.5e+05 s    Elapsed time so far: 151.7 s
70.2 %        2.5e+05 s    Elapsed time so far: 151.8 s
70.3 %        2.5e+05 s    Elapsed time so far: 152.0 s
70.5 %        2.5e+05 s    Elapsed time so far: 152.2 s
70.6 %        2.5e+05 s    Elapsed time so far: 152.4 s
70.7 %        2.5e+05 s    Elapsed time so far: 152.6 s
70.9 %        2.5e+05 s    Elapsed time so far: 152.8 s
71.0 %        2.6e+05 s    Elapsed time so far: 153.0 s
71.2 %        2.6e+05 s    Elapsed time so far: 153.1 s
71.3 %        2.6e+05 s    Elapsed time so far: 153.3 s
71.4 %        2.6e+05 s    Elapsed time so far: 153.5 s
71.6 %        2.6e+05 s    Elapsed time so far: 153.7 s
71.7 %        2.6e+05 s    Elapsed time so far: 153.9 s
71.8 %        2.6e+05 s    Elapsed time so far: 154.1 s
72.0 %        2.6e+05 s    Elapsed time so far: 154.3 s
72.1 %        2.6e+05 s    Elapsed time so far: 154.5 s
72.3 %        2.6e+05 s    Elapsed time so far: 154.7 s
72.4 %        2.6e+05 s    Elapsed time so far: 154.9 s
72.5 %        2.6e+05 s    Elapsed time so far: 155.0 s
72.7 %        2.6e+05 s    Elapsed time so far: 155.2 s
72.8 %        2.6e+05 s    Elapsed time so far: 155.4 s
73.0 %        2.6e+05 s    Elapsed time so far: 155.6 s
73.1 %        2.6e+05 s    Elapsed time so far: 155.8 s
73.2 %        2.6e+05 s    Elapsed time so far: 156.0 s
73.4 %        2.6e+05 s    Elapsed time so far: 156.2 s
73.5 %        2.6e+05 s    Elapsed time so far: 156.4 s
73.7 %        2.6e+05 s    Elapsed time so far: 156.6 s
73.8 %        2.7e+05 s    Elapsed time so far: 156.8 s
73.9 %        2.7e+05 s    Elapsed time so far: 157.0 s
74.1 %        2.7e+05 s    Elapsed time so far: 157.1 s
74.2 %        2.7e+05 s    Elapsed time so far: 157.3 s
74.3 %        2.7e+05 s    Elapsed time so far: 157.5 s
74.5 %        2.7e+05 s    Elapsed time so far: 157.7 s
74.6 %        2.7e+05 s    Elapsed time so far: 157.9 s
74.8 %        2.7e+05 s    Elapsed time so far: 158.1 s
74.9 %        2.7e+05 s    Elapsed time so far: 158.3 s
75.0 %        2.7e+05 s    Elapsed time so far: 158.5 s
75.2 %        2.7e+05 s    Elapsed time so far: 158.7 s
75.3 %        2.7e+05 s    Elapsed time so far: 158.8 s
75.5 %        2.7e+05 s    Elapsed time so far: 159.0 s
75.6 %        2.7e+05 s    Elapsed time so far: 159.2 s
75.7 %        2.7e+05 s    Elapsed time so far: 159.3 s
75.9 %        2.7e+05 s    Elapsed time so far: 159.5 s
76.0 %        2.7e+05 s    Elapsed time so far: 159.7 s
76.2 %        2.7e+05 s    Elapsed time so far: 159.9 s
76.3 %        2.7e+05 s    Elapsed time so far: 160.1 s
76.4 %        2.7e+05 s    Elapsed time so far: 160.3 s
76.6 %        2.8e+05 s    Elapsed time so far: 160.5 s
76.7 %        2.8e+05 s    Elapsed time so far: 160.7 s
76.8 %        2.8e+05 s    Elapsed time so far: 160.9 s
77.0 %        2.8e+05 s    Elapsed time so far: 161.1 s
77.1 %        2.8e+05 s    Elapsed time so far: 161.3 s
77.3 %        2.8e+05 s    Elapsed time so far: 161.5 s
77.4 %        2.8e+05 s    Elapsed time so far: 161.7 s
77.5 %        2.8e+05 s    Elapsed time so far: 161.8 s
77.7 %        2.8e+05 s    Elapsed time so far: 162.0 s
77.8 %        2.8e+05 s    Elapsed time so far: 162.2 s
78.0 %        2.8e+05 s    Elapsed time so far: 162.4 s
78.1 %        2.8e+05 s    Elapsed time so far: 162.6 s
78.2 %        2.8e+05 s    Elapsed time so far: 162.8 s
78.4 %        2.8e+05 s    Elapsed time so far: 163.0 s
78.5 %        2.8e+05 s    Elapsed time so far: 163.2 s
78.7 %        2.8e+05 s    Elapsed time so far: 163.3 s
78.8 %        2.8e+05 s    Elapsed time so far: 163.5 s
78.9 %        2.8e+05 s    Elapsed time so far: 163.7 s
79.1 %        2.8e+05 s    Elapsed time so far: 163.9 s
79.2 %        2.8e+05 s    Elapsed time so far: 164.1 s
79.4 %        2.9e+05 s    Elapsed time so far: 164.3 s
79.5 %        2.9e+05 s    Elapsed time so far: 164.5 s
79.6 %        2.9e+05 s    Elapsed time so far: 164.7 s
79.8 %        2.9e+05 s    Elapsed time so far: 164.9 s
79.9 %        2.9e+05 s    Elapsed time so far: 165.0 s
80.0 %        2.9e+05 s    Elapsed time so far: 165.2 s
80.2 %        2.9e+05 s    Elapsed time so far: 165.4 s
80.3 %        2.9e+05 s    Elapsed time so far: 165.6 s
80.5 %        2.9e+05 s    Elapsed time so far: 165.8 s
80.6 %        2.9e+05 s    Elapsed time so far: 166.0 s
80.8 %        2.9e+05 s    Elapsed time so far: 166.2 s
80.9 %        2.9e+05 s    Elapsed time so far: 166.4 s
81.0 %        2.9e+05 s    Elapsed time so far: 166.6 s
81.2 %        2.9e+05 s    Elapsed time so far: 166.8 s
81.3 %        2.9e+05 s    Elapsed time so far: 167.0 s
81.4 %        2.9e+05 s    Elapsed time so far: 167.1 s
81.6 %        2.9e+05 s    Elapsed time so far: 167.3 s
81.7 %        2.9e+05 s    Elapsed time so far: 167.5 s
81.9 %        2.9e+05 s    Elapsed time so far: 167.7 s
82.0 %        2.9e+05 s    Elapsed time so far: 167.9 s
82.1 %        3.0e+05 s    Elapsed time so far: 168.1 s
82.3 %        3.0e+05 s    Elapsed time so far: 168.3 s
82.4 %        3.0e+05 s    Elapsed time so far: 168.5 s
82.5 %        3.0e+05 s    Elapsed time so far: 168.7 s
82.7 %        3.0e+05 s    Elapsed time so far: 168.8 s
82.8 %        3.0e+05 s    Elapsed time so far: 169.0 s
83.0 %        3.0e+05 s    Elapsed time so far: 169.2 s
83.1 %        3.0e+05 s    Elapsed time so far: 169.4 s
83.2 %        3.0e+05 s    Elapsed time so far: 169.5 s
83.4 %        3.0e+05 s    Elapsed time so far: 169.7 s
83.5 %        3.0e+05 s    Elapsed time so far: 169.9 s
83.7 %        3.0e+05 s    Elapsed time so far: 170.1 s
83.8 %        3.0e+05 s    Elapsed time so far: 170.3 s
83.9 %        3.0e+05 s    Elapsed time so far: 170.5 s
84.1 %        3.0e+05 s    Elapsed time so far: 170.7 s
84.2 %        3.0e+05 s    Elapsed time so far: 170.9 s
84.4 %        3.0e+05 s    Elapsed time so far: 171.1 s
84.5 %        3.0e+05 s    Elapsed time so far: 171.3 s
84.6 %        3.0e+05 s    Elapsed time so far: 171.5 s
84.8 %        3.0e+05 s    Elapsed time so far: 171.6 s
84.9 %        3.1e+05 s    Elapsed time so far: 171.8 s
85.1 %        3.1e+05 s    Elapsed time so far: 172.0 s
85.2 %        3.1e+05 s    Elapsed time so far: 172.2 s
85.3 %        3.1e+05 s    Elapsed time so far: 172.4 s
85.5 %        3.1e+05 s    Elapsed time so far: 172.6 s
85.6 %        3.1e+05 s    Elapsed time so far: 172.8 s
85.8 %        3.1e+05 s    Elapsed time so far: 173.0 s
85.9 %        3.1e+05 s    Elapsed time so far: 173.1 s
86.0 %        3.1e+05 s    Elapsed time so far: 173.3 s
86.2 %        3.1e+05 s    Elapsed time so far: 173.5 s
86.3 %        3.1e+05 s    Elapsed time so far: 173.7 s
86.5 %        3.1e+05 s    Elapsed time so far: 173.9 s
86.6 %        3.1e+05 s    Elapsed time so far: 174.1 s
86.7 %        3.1e+05 s    Elapsed time so far: 174.3 s
86.9 %        3.1e+05 s    Elapsed time so far: 174.5 s
87.0 %        3.1e+05 s    Elapsed time so far: 174.7 s
87.1 %        3.1e+05 s    Elapsed time so far: 174.8 s
87.3 %        3.1e+05 s    Elapsed time so far: 175.0 s
87.4 %        3.1e+05 s    Elapsed time so far: 175.2 s
87.6 %        3.1e+05 s    Elapsed time so far: 175.4 s
87.7 %        3.2e+05 s    Elapsed time so far: 175.6 s
87.8 %        3.2e+05 s    Elapsed time so far: 175.8 s
88.0 %        3.2e+05 s    Elapsed time so far: 176.0 s
88.1 %        3.2e+05 s    Elapsed time so far: 176.2 s
88.2 %        3.2e+05 s    Elapsed time so far: 176.4 s
88.4 %        3.2e+05 s    Elapsed time so far: 176.6 s
88.5 %        3.2e+05 s    Elapsed time so far: 176.8 s
88.7 %        3.2e+05 s    Elapsed time so far: 177.0 s
88.8 %        3.2e+05 s    Elapsed time so far: 177.2 s
89.0 %        3.2e+05 s    Elapsed time so far: 177.3 s
89.1 %        3.2e+05 s    Elapsed time so far: 177.5 s
89.2 %        3.2e+05 s    Elapsed time so far: 177.7 s
89.4 %        3.2e+05 s    Elapsed time so far: 177.9 s
89.5 %        3.2e+05 s    Elapsed time so far: 178.1 s
89.6 %        3.2e+05 s    Elapsed time so far: 178.3 s
89.8 %        3.2e+05 s    Elapsed time so far: 178.5 s
89.9 %        3.2e+05 s    Elapsed time so far: 178.7 s
90.1 %        3.2e+05 s    Elapsed time so far: 178.9 s
90.2 %        3.2e+05 s    Elapsed time so far: 179.1 s
90.3 %        3.2e+05 s    Elapsed time so far: 179.3 s
90.5 %        3.3e+05 s    Elapsed time so far: 179.5 s
90.6 %        3.3e+05 s    Elapsed time so far: 179.7 s
90.8 %        3.3e+05 s    Elapsed time so far: 179.9 s
90.9 %        3.3e+05 s    Elapsed time so far: 180.1 s
91.0 %        3.3e+05 s    Elapsed time so far: 180.2 s
91.2 %        3.3e+05 s    Elapsed time so far: 180.4 s
91.3 %        3.3e+05 s    Elapsed time so far: 180.6 s
91.5 %        3.3e+05 s    Elapsed time so far: 180.8 s
91.6 %        3.3e+05 s    Elapsed time so far: 181.0 s
91.7 %        3.3e+05 s    Elapsed time so far: 181.2 s
91.9 %        3.3e+05 s    Elapsed time so far: 181.4 s
92.0 %        3.3e+05 s    Elapsed time so far: 181.6 s
92.2 %        3.3e+05 s    Elapsed time so far: 181.8 s
92.3 %        3.3e+05 s    Elapsed time so far: 182.0 s
92.4 %        3.3e+05 s    Elapsed time so far: 182.2 s
92.6 %        3.3e+05 s    Elapsed time so far: 182.4 s
92.7 %        3.3e+05 s    Elapsed time so far: 182.6 s
92.8 %        3.3e+05 s    Elapsed time so far: 182.8 s
93.0 %        3.3e+05 s    Elapsed time so far: 182.9 s
93.1 %        3.3e+05 s    Elapsed time so far: 183.1 s
93.3 %        3.4e+05 s    Elapsed time so far: 183.3 s
93.4 %        3.4e+05 s    Elapsed time so far: 183.4 s
93.5 %        3.4e+05 s    Elapsed time so far: 183.6 s
93.7 %        3.4e+05 s    Elapsed time so far: 183.8 s
93.8 %        3.4e+05 s    Elapsed time so far: 184.0 s
94.0 %        3.4e+05 s    Elapsed time so far: 184.2 s
94.1 %        3.4e+05 s    Elapsed time so far: 184.4 s
94.2 %        3.4e+05 s    Elapsed time so far: 184.6 s
94.4 %        3.4e+05 s    Elapsed time so far: 184.8 s
94.5 %        3.4e+05 s    Elapsed time so far: 185.0 s
94.7 %        3.4e+05 s    Elapsed time so far: 185.2 s
94.8 %        3.4e+05 s    Elapsed time so far: 185.4 s
94.9 %        3.4e+05 s    Elapsed time so far: 185.6 s
95.1 %        3.4e+05 s    Elapsed time so far: 185.7 s
95.2 %        3.4e+05 s    Elapsed time so far: 185.9 s
95.3 %        3.4e+05 s    Elapsed time so far: 186.1 s
95.5 %        3.4e+05 s    Elapsed time so far: 186.3 s
95.6 %        3.4e+05 s    Elapsed time so far: 186.5 s
95.8 %        3.4e+05 s    Elapsed time so far: 186.7 s
95.9 %        3.4e+05 s    Elapsed time so far: 186.9 s
96.0 %        3.5e+05 s    Elapsed time so far: 187.1 s
96.2 %        3.5e+05 s    Elapsed time so far: 187.3 s
96.3 %        3.5e+05 s    Elapsed time so far: 187.4 s
96.5 %        3.5e+05 s    Elapsed time so far: 187.6 s
96.6 %        3.5e+05 s    Elapsed time so far: 187.8 s
96.7 %        3.5e+05 s    Elapsed time so far: 188.0 s
96.9 %        3.5e+05 s    Elapsed time so far: 188.2 s
97.0 %        3.5e+05 s    Elapsed time so far: 188.4 s
97.2 %        3.5e+05 s    Elapsed time so far: 188.6 s
97.3 %        3.5e+05 s    Elapsed time so far: 188.8 s
97.4 %        3.5e+05 s    Elapsed time so far: 189.0 s
97.6 %        3.5e+05 s    Elapsed time so far: 189.2 s
97.7 %        3.5e+05 s    Elapsed time so far: 189.4 s
97.8 %        3.5e+05 s    Elapsed time so far: 189.5 s
98.0 %        3.5e+05 s    Elapsed time so far: 189.7 s
98.1 %        3.5e+05 s    Elapsed time so far: 189.9 s
98.3 %        3.5e+05 s    Elapsed time so far: 190.1 s
98.4 %        3.5e+05 s    Elapsed time so far: 190.3 s
98.5 %        3.5e+05 s    Elapsed time so far: 190.5 s
98.7 %        3.5e+05 s    Elapsed time so far: 190.7 s
98.8 %        3.6e+05 s    Elapsed time so far: 190.9 s
99.0 %        3.6e+05 s    Elapsed time so far: 191.1 s
99.1 %        3.6e+05 s    Elapsed time so far: 191.3 s
99.2 %        3.6e+05 s    Elapsed time so far: 191.5 s
99.4 %        3.6e+05 s    Elapsed time so far: 191.7 s
99.5 %        3.6e+05 s    Elapsed time so far: 191.9 s
99.7 %        3.6e+05 s    Elapsed time so far: 192.0 s
99.8 %        3.6e+05 s    Elapsed time so far: 192.2 s
99.9 %        3.6e+05 s    Elapsed time so far: 192.4 s
100.0 %        3.6e+05 s    Elapsed time so far: 192.6 s

Comparison with experimental data and MHIMS: D content#

The results produced by FESTIM are in good agreement with the experimental data and correlate perfectly with MHIMS.

Hide code cell source
import plotly.graph_objects as go
import plotly.express as px
from scipy.interpolate import interp1d


def RMSPE(x_sim, x_exp):
    error = np.sqrt(np.mean((x_sim - x_exp) ** 2)) / np.mean(x_exp)
    return error


retention = (
    np.array(derived_quantities[0].data)
    + np.array(derived_quantities[1].data)
    + np.array(derived_quantities[2].data)
)
t = np.array(derived_quantities.t)

exp_ret = np.loadtxt("./reference_data/exp_ret.csv", delimiter=",", skiprows=1)

interp_ret = interp1d(t / 3600, retention, fill_value="extrapolate")

error = RMSPE(
    interp_ret(
        exp_ret[:, 0],
    ),
    exp_ret[:, 1],
)

print(f"RMSPE between FESTIM and experimental data is {error*100:.2f}%")

MHIMS_ret = np.loadtxt("./reference_data/MHIMS_ret.csv", delimiter=",", skiprows=1)

fig = go.Figure()

fig.add_trace(
    go.Scatter(
        x=t / 3600,
        y=retention / 1e20,
        mode="lines",
        line=dict(width=4, color=px.colors.qualitative.Plotly[1]),
        name="FESTIM",
    )
)

fig.add_trace(
    go.Scatter(
        x=MHIMS_ret[::100, 0],
        y=MHIMS_ret[::100, 1] / 1e20,
        mode="markers",
        marker_symbol="square",
        marker=dict(size=10, color=px.colors.qualitative.Plotly[2], opacity=0.6),
        name="MHIMS",
    )
)

fig.add_trace(
    go.Scatter(
        x=exp_ret[:, 0],
        y=exp_ret[:, 1] / 1e20,
        mode="markers",
        marker=dict(size=10, color=px.colors.qualitative.Plotly[0], opacity=0.6),
        name="Exp.",
    )
)

fig.update_yaxes(
    title_text="D inventory, 10<sup>20</sup> m<sup>-2</sup>",
    range=[0, 5],
    tick0=0,
    dtick=1,
)
fig.update_xaxes(title_text="Time, h", range=[0, 100], tick0=0, dtick=10)
fig.update_layout(template="simple_white", height=600)

# The writing-reading block below is needed to avoid the issue with compatibility
# of Plotly plots and dollarmath syntax extension in Jupyter Book
# For mode details, see https://github.com/jupyter-book/jupyter-book/issues/1528

fig.write_html("./markelj_comparison_ret.html")
from IPython.display import HTML, display

display(HTML("./markelj_comparison_ret.html"))
RMSPE between FESTIM and experimental data is 7.30%

Comparison with experimental data: D depth distribution#

FESTIM reproduces well the experimental NRA measurements.

Hide code cell source
fig = go.Figure()

FESTIM_profiles = np.genfromtxt("./FESTIM_sim.txt", names=True, delimiter=",")
NRA_exp = np.loadtxt("./reference_data/exp_NRA.csv", delimiter=",", skiprows=1)
NRA_sto = np.loadtxt("./reference_data/sto_NRA.csv", delimiter=",", skiprows=1)


def create_slider(fig):
    steps = []
    for i in range(0, len(fig.data), 2):
        step = dict(
            method="update",
            args=[
                {"visible": [False] * len(fig.data)},
                {"title": "Time: " + f"{export_times[int(i/2)]/3600:.2f}"},
            ],  # layout attribute
            label=f"{export_times[int(i/2)]/3600:.2f} h",
        )
        step["args"][0]["visible"][i] = True  # Toggle i'th trace to "visible"
        step["args"][0]["visible"][i + 1] = True  # Toggle i+1'th trace to "visible"
        steps.append(step)

    sliders = [
        dict(active=0, currentvalue={"prefix": "Time: "}, pad={"t": 50}, steps=steps)
    ]

    return sliders


for i, t in enumerate(export_times):
    x = FESTIM_profiles["x"]
    y = FESTIM_profiles[f"t{t:.2e}s".replace(".", "").replace("+", "")]
    # order y by x
    x, y = zip(*sorted(zip(x, y)))

    color = px.colors.qualitative.Plotly[i]

    fig.add_trace(
        go.Scatter(
            x=np.array(x) / 1e-6,
            y=np.array(y) / rho_W * 100,
            mode="lines",
            line=dict(width=3.5, color=px.colors.qualitative.Plotly[i]),
            name="FESTIM",
            visible=False,
        )
    )

    if i <= 4:
        fig.add_trace(
            go.Scatter(
                x=NRA_exp[:, 0],
                y=NRA_exp[:, i + 1],
                mode="lines",
                line=dict(
                    width=3.5, color=px.colors.qualitative.Plotly[i], dash="dash"
                ),
                name="NRA",
                visible=False,
            )
        )
    else:
        fig.add_trace(
            go.Scatter(
                x=NRA_sto[:, 0],
                y=NRA_sto[:, i - 4],
                mode="lines",
                line=dict(
                    width=3.5, color=px.colors.qualitative.Plotly[i], dash="dash"
                ),
                name="NRA",
                visible=False,
            )
        )

fig.data[0].visible = True
fig.data[1].visible = True

fig.update_yaxes(title_text="D concentration, at.%", range=[0, 0.5], tick0=0, dtick=0.1)
fig.update_xaxes(title_text="Depth, &#181;m", range=[0, 5], tick0=0, dtick=1)
fig.update_layout(template="simple_white", sliders=create_slider(fig), height=600)

# The writing-reading block below is needed to avoid the issue with compatibility
# of Plotly plots and dollarmath syntax extension in Jupyter Book
# For mode details, see https://github.com/jupyter-book/jupyter-book/issues/1528

fig.write_html("./markelj_profiles_exp.html")

display(HTML("./markelj_profiles_exp.html"))

Comparison with MHIMS: D depth distribution#

FESTIM agrees with MHIMS. Slight differences are due to the use of the precise value of Fernandez’s diffusivity pre-factor. FESTIM uses the value from HTM divided by \(\sqrt{2}\): \(1.93 \times 10^{-7} / \sqrt{2}\), whereas the presented diffusivity pre-factor in [26] is \(1.9 \times 10^{-7} / \sqrt{2}\).

Hide code cell source
fig = go.Figure()

FESTIM_profiles = np.genfromtxt("./FESTIM_sim.txt", names=True, delimiter=",")
MHIMS_profiles = np.loadtxt(
    "./reference_data/MHIMS_profiles.csv", delimiter=",", skiprows=1
)

for i, t in enumerate(export_times):
    x = FESTIM_profiles["x"]
    y = FESTIM_profiles[f"t{t:.2e}s".replace(".", "").replace("+", "")]
    # order y by x
    x, y = zip(*sorted(zip(x, y)))

    color = px.colors.qualitative.Plotly[i]

    fig.add_trace(
        go.Scatter(
            x=np.array(x) / 1e-6,
            y=np.array(y) / rho_W * 100,
            mode="lines",
            line=dict(width=3.5, color=px.colors.qualitative.Plotly[i]),
            name="FESTIM",
            visible=False,
        )
    )

    fig.add_trace(
        go.Scatter(
            x=MHIMS_profiles[:, 0],
            y=MHIMS_profiles[:, i + 1],
            mode="markers",
            marker=dict(size=10, color=px.colors.qualitative.Plotly[i], opacity=0.4),
            name="MHIMS",
            visible=False,
        )
    )

fig.data[0].visible = True
fig.data[1].visible = True

fig.update_yaxes(title_text="D concentration, at.%", range=[0, 0.5], tick0=0, dtick=0.1)
fig.update_xaxes(title_text="Depth, &#181;m", range=[0, 5], tick0=0, dtick=1)
fig.update_layout(template="simple_white", sliders=create_slider(fig), height=600)

# The writing-reading block below is needed to avoid the issue with compatibility
# of Plotly plots and dollarmath syntax extension in Jupyter Book
# For mode details, see https://github.com/jupyter-book/jupyter-book/issues/1528

fig.write_html("./markelj_profiles_MHIMS.html")

display(HTML("./markelj_profiles_MHIMS.html"))