Cp contact hard.m

Cross-polarisation experiment in the rotating frame. Applies an ideal pi/2 pulse using the specified operators, then evolves the system with the specified spin-lock terms added to the Liovillian. The contact curve is returned.

Syntax

    contact_curve=cp_contact_hard(spin_system,parameters,H,R,K)

Arguments

    parameters.irr_powers - a matrix containing the values
                            of the spin-lock nutation fre-
                            quency on each channel (rows)
                            at each time slice (cols), Hz
                            
    parameters.irr_opers  - a cell array of spin operators
                            corresponding to the spin-lock
                            on each channel

    parameters.exc_opers  - a cell array of spin operators
                            for the ideal pi/2 excitation 
                            pulse (same flip angle on all
                            channels)

    parameters.time_steps - a vector of time slice durati-
                            ons, seconds

    parameters.rho0       - initial state vector

    parameters.coil       - detection state vector

    H - Hamiltonian matrix, received from context function

    R - relaxation superoperator, received from context function

    K - kinetics superoperator, received from context function

Outputs

    contact_curve - contact curve detected on the coil
                    state specified in parameters.coil

Examples

An example of a 1H-15N CP matching condition scan under MAS (examples/nmr_solids/cp_powder_mas_1.m) appears below.

See also

overtone_cp.m, dante.m, cn2d_dq.m, cn2d_sq.m, mqmas.m, cp_acquire_soft.m, cp_contact_soft.m

Solid state NMR experiments

Version 2.9, authors: Ilya Kuprov, Marina Carravetta, Phil Williamson