Pulse diagnostics for the three-pulse DEER/PELDOR pulse sequence. This function shows how soft pulses affect the magnetisation of the sample. It is a hypothetical experiment where a soft pulse specified by the user is performed, immediately followed by an ideal pi/2 pulse on all spins followed by infinite-bandwidth time-domain detection.
parameters.pulse_frq - frequencies for the three pulses, Hz parameters.pulse_pwr - power levels for the three pulses, rad/s parameters.pulse_dur - durations for the three pulses, seconds parameters.pulse_phi - initial phases for the three pulses, radians parameters.pulse_rnk - Fokker-Planck ranks for the three pulses parameters.offset - receiver offset for the time domain detection, Hz parameters.sweep - sweep width for time domain detection, Hz parameters.npoints - number of points in the free induction decay parameters.rho0 - initial state parameters.coil - detection state parameters.method - soft puse propagation method, 'expv' for Krylov propagation, 'expm' for exponential propa- gation, 'evolution' for Spin- ach evolution function H - Hamiltonian matrix, received from context function R - relaxation superoperator, received from context function K - kinetics superoperator, received from context function
fids - three free induction decays that should be apo- dised and Fourier transformed
A good case is the first figure produced by examples/esr_solids/soft_3_pulse_deer_2e.m example file, reproduced below.
For the method, start with 'expm', change to 'expv' if the calculation runs out of memory, and use 'evolution' as the last resort.
Version 2.4, authors: Ilya Kuprov