Title:
Tutorial example - IR photo-electron spectrum of hydrogen
First, run 'tRecX' with this input file.
Then compute the photo-electron spectra with 'Spectrum' and the output directory as input
The purpose of this exercise is to demonstrate scaling with propagation time
# TIMING
Run time for tRecX with given parameters about 7 min on a decent CPU for tRecX
Run time for Spectrum grows linearly with momentum resolution, e.g. 120 sec at -nR=200
[TASK] run Spectrum, inspect the spectra obtained by Rc=20 and 30
[TASK] perform convergence studies
the initial parameters in this file are adjusted to yield ~ 1% accuracy in much of the spectrum
# Verify by varying:
# Eta-axis (i.e. angular momenta)
# Rn-axis radial basis
# TimePropagation: accuracy
# TimePropagation: cutEnergy
#define BOX 20
# Rc - where to pick up the surface flux
Surface: points=BOX
# basis for about 1% good results (some optimization tried)
Axis: name,nCoefficients,lower end, upper end,functions,order
Phi,1
Eta,30,-1,1, assocLegendre{Phi}
Rn,40, 0.,BOX,polynomial,20
Rn,20, BOX,Infty,polExp[0.5]
Absorption: kind, axis, theta, upper
ECS,Rn,0.3,BOX
# potential in the Hamiltonian - as in 1d, we clip the Coulomb tail off
Operator: hamiltonian='1/2<>-<1><1>'
Operator: interaction='iLaserA0[t]<>'
Operator: expectationValue='<1><1>'
Laser: shape, I(W/cm2), FWHM, lambda(nm)
cos8, 2.e14, 10. OptCyc, 800.
TimePropagation: end,print,store,cutEnergy,accuracy,operatorThreshold
30 OptCyc, 0.25 OptCyc,0.5 au,50,5.e-9,5.e-8