def keldysh_parameter(I, wavelength, I0): """ I: Laser intensity [W/cm**2] wavelength: laser wavelength [nm] I0: Ionization potential [a.u.] """ #I_au = units.SItoAtomic(I, units.UNIT_FIELD_INTENSITY) omega_au = freq_from_wavelength(wavelength) #gamma = 2 * omega_au**2 * I0 / I_au Up = ponderomotive_energy(field_from_intensity(I), freq_from_wavelength(wavelength)) gamma = sqrt(I0 / (2 * Up)) return gamma
def keldysh_parameter(I, wavelength, I0):
"""
I: Laser intensity [W/cm**2]
wavelength: laser wavelength [nm]
I0: Ionization potential [a.u.]
"""
#I_au = units.SItoAtomic(I, units.UNIT_FIELD_INTENSITY)
omega_au = freq_from_wavelength(wavelength)
#gamma = 2 * omega_au**2 * I0 / I_au
Up = ponderomotive_energy(field_from_intensity(I),
freq_from_wavelength(wavelength))
gamma = sqrt(I0 / (2 * Up))
return gamma
def keldysh_parameter(I, wavelength, I0): """ I: Laser intensity [W/cm**2] wavelength: laser wavelength [nm] I0: Ionization potential [a.u.] """ I_au = units.SItoAtomic(I, units.UNIT_FIELD_INTENSITY) omega_au = freq_from_wavelength(wavelength) gamma = 2 * omega_au**2 * I0 / I_au return gamma
def keldysh_parameter(I, wavelength, I0):
"""
I: Laser intensity [W/cm**2]
wavelength: laser wavelength [nm]
I0: Ionization potential [a.u.]
"""
I_au = units.SItoAtomic(I, units.UNIT_FIELD_INTENSITY)
omega_au = freq_from_wavelength(wavelength)
gamma = 2 * omega_au**2 * I0 / I_au
return gamma
def ponderomotive_energy_au_from_SI(I, wavelength): """ I: intensity in W/cm**2 wavelength: wavelength in nm Returns ponderomotive energy in a.u. """ I_au = units.SItoAtomic(I, units.UNIT_FIELD_INTENSITY) omega_au = freq_from_wavelength(wavelength) Up = ponderomotive_energy(I_au, omega_au) return Up
def ponderomotive_energy_au_from_SI(I, wavelength):
"""
I: intensity in W/cm**2
wavelength: wavelength in nm
Returns ponderomotive energy in a.u.
"""
I_au = units.SItoAtomic(I, units.UNIT_FIELD_INTENSITY)
omega_au = freq_from_wavelength(wavelength)
Up = ponderomotive_energy(I_au, omega_au)
return Up
#Load unit conversion
sys.path.append(os.path.abspath("./pyprop/pyprop/utilities"))
import units
from units import ElectricFieldAtomicFromIntensitySI as field_from_intensity
from units import AngularFrequencyAtomicFromWavelengthSI as freq_from_wavelength
#Unit conversion factors
femtosec_to_au = 1e-15 / units.constantsAU.time
#Pulse duration from intensity full with half maximum
#for a cos**2 pulse
fwhm_intensity = pi / arccos(0.5**0.25) / 2.0
#Converts wavelength in nm -> time of one cycle a.u.
cycletime_from_wavelength = lambda l: 2 * pi / freq_from_wavelength(l)
#Ponderomotive energy
ponderomotive_energy = lambda I, omega: I / (4.0 * omega**2)
#eV -> au
eV_to_au = 3.674932540e-2
def ponderomotive_energy_au_from_SI(I, wavelength):
"""
I: intensity in W/cm**2
wavelength: wavelength in nm
Returns ponderomotive energy in a.u.
"""
I_au = units.SItoAtomic(I, units.UNIT_FIELD_INTENSITY)
#Load unit conversion
sys.path.append(os.path.abspath("./pyprop/pyprop/utilities"))
import units
from units import ElectricFieldAtomicFromIntensitySI as field_from_intensity
from units import AngularFrequencyAtomicFromWavelengthSI as freq_from_wavelength
#Unit conversion factors
femtosec_to_au = 1e-15 / units.constantsAU.time
#Pulse duration from intensity full with half maximum
#for a cos**2 pulse
fwhm_intensity = pi / arccos(0.5**0.25) / 2.0
#Converts wavelength in nm -> time of one cycle a.u.
cycletime_from_wavelength = lambda l: 2 * pi / freq_from_wavelength(l)
#Ponderomotive energy
ponderomotive_energy = lambda I, omega: I / (4.0 * omega**2)
#eV -> au
eV_to_au = 3.674932540e-2
def ponderomotive_energy_au_from_SI(I, wavelength):
"""
I: intensity in W/cm**2
wavelength: wavelength in nm
Returns ponderomotive energy in a.u.
"""
