agrego valores comunes, unidades, etc

pyLIAF/common_values.py

+"""
+Units and constants commonly used in physics, with the numeric value being
+expressed in the respective SI base units.
+
+some of this is extracted from:
+    https://github.com/OxfordIonTrapGroup/oitg/blob/master/oitg/units.py
+
+"""
+import math
+
+# Constants {{{
+pi = math.pi
+e = 1.602176565e-19;		# 1.602 176 565(35) x 10-19 C : CODATA 2010 : Electron charge
+g = 9.80665;		# m/s^2
+kB = 1.3806488e-23;		# 1.380 6488(13) x 10-23 J K-1 : CODATA 2010 : Boltzmann constant
+sigma_SB = 5.670373e-8;		# 5.670 373(21) x 10-8 W m-2 K-4 : CODATA 2010 : Stefan-Boltzmann constant
+h = 6.62606957e-34;		# 6.626 069 57(29) x 10-34 J s : CODATA 2010 : Planck constant
+hbar = h/(2*pi);
+mu_B = 927.400968e-26;		# 927.400 968(20) x 10-26 J T-1  : CODATA 2010 : Bohr magneton
+mu_N = 5.05078353e-27;		# 5.050 783 53(11) x 10-27 J T-1 : CODATA 2010 : Nuclear magneton
+c = 299792458.;		# 299 792 458 m s-1 (exact) : CODATA 2010 : Speed of light in vacuum
+mu0 = 4*pi*1e-7;		# 4*pi*1e-7 (exact) : Definition of magnetic constant
+eps0 = 1/(mu0*c**2);		# 1/(mu0*c^2) (exact) : Definition of electric constant
+alpha = 7.2973525698e-3;		# 7.297 352 5698(24) x 10-3 : CODATA 2010 : Fine structure constant
+gS = 2.00231930436153;		# 2.002 319 304 361 53(53) : CODATA 2010 : Electron g factor
+# }}}
+
+# Lasers {{{
+class _Light():
+    def __init__(self, long=None, freq=None):
+        if long:
+            self.wavelength = long
+            self.frequency = c/long
+        elif freq:
+            self.frequency = freq
+            self.wavelength = c/freq
+        else:
+            raise Exception("Must have wavelength or frequency")
+
+repump_laser   = _Light(long=866.451)
+doppler_laser  = _Light(long=396.959)
+photoion_laser = _Light(long=422.792)
+# }}}
+
+# Length {{{
+m = 1.;
+km = 1e3*m;
+cm = 1e-2*m;
+mm = 1e-3*m;
+um = 1e-6*m;
+nm = 1e-9*m;
+a0 = 5.2917721092e-11*m;		# 5.2917721092(17)×10-11 m : CODATA 2010 : Bohr radius
+# }}}
+
+# Time {{{
+s = 1.;
+ms = 1e-3*s;
+us = 1e-6*s;
+ns = 1e-9*s;
+ps = 1e-12*s;
+fs = 1e-15*s;
+minute = 60*s;
+hr = 60*minute;
+day = 24*hr;
+year = 365.242199*day;
+# }}}
+
+# Frequency {{{
+Hz = 1/s;
+kHz = 1e3 *Hz;
+MHz = 1e6 *Hz;
+GHz = 1e9 *Hz;
+THz = 1e12*Hz;
+# }}}
+
+# Energy {{{
+J = 1.;
+MJ = 1e6*J;
+kJ = 1e3*J;
+mJ = 1e-3*J;
+uJ = 1e-6*J;
+nJ = 1e-9*J;
+pJ = 1e-12*J;
+eV = e;
+BTU = 1.0550559e3*J;
+kWh = 3.6e6*J;
+cal = 4.1868*J;
+kCal = 1e3*cal;
+# }}}
+
+# Power {{{
+W = 1.;
+MW = 1e6*W;
+kW = 1e3*W;
+mW = 1e-3*W;
+uW = 1e-6*W;
+nW = 1e-9*W;
+# }}}
+
+# Voltage {{{
+V = 1.;
+kV = 1e3*V;
+mV = 1e-3*V;
+uV = 1e-6*V;
+nV = 1e-9*V;
+# }}}
+
+# Current {{{
+A = 1.;
+mA = 1e-3*A;
+uA = 1e-6*A;
+nA = 1e-9*A;
+pA = 1e-12*A;
+fA = 1e-15*A;
+# }}}