Created
July 7, 2014 09:45
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Lawson criterion
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#!/usr/bin/env python | |
# -*- coding: utf-8 -*-* | |
import matplotlib.pyplot as plt | |
import scipy.interpolate as intp | |
import numpy as np | |
# <σν> データセット | |
x = [1, 10, 10**2, 10**3] | |
y = [10**-26.5, 10**-22, 10**-21.2, 10**-21.8] | |
xi = np.arange(x[0], x[-1], 0.1); | |
sigma_nu = intp.interp1d(x, y, kind='quadratic') # 補間 | |
y_data = sigma_nu(xi) | |
plt.subplots_adjust(hspace=0.5, wspace=0.5) | |
# 上側のグラフ:sigma_nu | |
axes = plt.subplot(211) | |
axes.set_xscale("log") | |
axes.set_yscale("log") # Y 軸を対数表示にする | |
plt.plot(xi,y_data,"r") # axes.plot に同じ | |
plt.xlabel('TEMPERATURE (keV)') | |
plt.ylabel('<sigma_nu> (m^3 / sec)') | |
# 下側のグラフ:n_tau | |
axes = plt.subplot(212) | |
axes.set_xscale("log") | |
axes.set_yscale("log") # Y 軸を対数表示にする | |
Q_range = [ r * 10 for r in range(1, 5)] | |
for Q in Q_range: | |
def n_tau(kt): | |
return 60 / Q / sigma_nu(kt) * kt | |
kts = np.arange(10, 101, 10); | |
nts = n_tau(kts) | |
#plt.plot(kts, nts, label="Q") # axes.plot に同じ | |
plt.plot(kts, nts, "o") # axes.plot に同じ | |
Q_labels = ["Q=" + str(q) for q in Q_range] | |
axes.legend(Q_labels, loc=0) | |
axes.axhline(color="black") | |
axes.axvline(color="black") | |
plt.xlabel('kT (keV)') | |
plt.ylabel('n_tau (sec keV /m^3)') | |
plt.show() | |
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