endor_davies.m

Davies ENDOR sequence with explicit soft pulses and all of the attendant effects, such as orientation selection. Soft pulses are simulated using the Fokker-Planck formalism.

Syntax

    answer=endor_davies(spin_system,parameters,H,R,K)

Arguments

The following parameters refer to the electron pi pulse. The duration of the electron pi/2 pulse is obtained by halving parameters.e_dur:

    parameters.e_frq - frequency of the electron pulse, Hz

    parameters.e_phi - phase of the electron pulse, rad

    parameters.e_pwr - power of the electron pulse, rad/s

    parameters.e_dur - duration of the electron pulse, s

    parameters.e_rnk - Fokker-Planck cut-off rank for
                       the electron pulse

The following parameters refer to the nuclei pulse:

    parameters.n_frq  - vector of frequencies for the nuclei
                        pulse, in Hz. The answer is returned
                        as a vector of the same dimension.

    parameters.n_phi  - phase of the nuclei pulse, rad

    parameters.n_pwr  - power of the nuclei pulse, rad/s

    parameters.n_dur  - duration of the nuclei pulse, s

    parameters.n_rnk  - Fokker-Planck cut-off rank for
                        the nuclei pulse

    parameters.method - method to use during the call
                        to shaped_pulse_af()

    H    - Hamiltonian matrix, received from context function

    R    - relaxation superoperator, received from context function

    K    - kinetics superoperator, received from context function

Outputs

    answer - amplitude detected on the coil state for each 
             frequency of the nuclear pulse

Notes

Fokker-Planck ranks should be increased until convergence is achieved in the output. The same applies to the size of the spherical grid.

See also

endor_cw.m, endor_mims.m, hyscore.m, fieldsweep.m

Version 2.3, authors: Luke Edwards