Difference between revisions of "Cp acquire soft.m"
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{{DISPLAYTITLE:cp_acquire_soft.m}} __NOTOC__ | {{DISPLAYTITLE:cp_acquire_soft.m}} __NOTOC__ | ||
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Cross-polarisation experiment in the rotating frame, followed by time-domain FID acquisition. The CP stage is preceded by wiping of the low-gamma spins and followed by FID acquisition with decoupling of the high-gamma spins. | Cross-polarisation experiment in the rotating frame, followed by time-domain FID acquisition. The CP stage is preceded by wiping of the low-gamma spins and followed by FID acquisition with decoupling of the high-gamma spins. | ||
==Syntax== | ==Syntax== | ||
| − | + | fid=cp_acquire_soft(spin_system,parameters,H,R,K) | |
==Arguments== | ==Arguments== | ||
| − | + | parameters.spins - working spins, a cell array of | |
strings with high-gamma spin fi- | strings with high-gamma spin fi- | ||
rst, and low-gamma spin last, | rst, and low-gamma spin last, | ||
for example {'1H','13C'} | for example {'1H','13C'} | ||
| − | + | ||
parameters.hi_pwr - nutation frequency of the exci- | parameters.hi_pwr - nutation frequency of the exci- | ||
tation pulse on the high-gamma | tation pulse on the high-gamma | ||
channel, Hz | channel, Hz | ||
| − | + | ||
parameters.cp_pwr - nutation frequencies on the two | parameters.cp_pwr - nutation frequencies on the two | ||
channels during the CP contact | channels during the CP contact | ||
time, a two-element vector, Hz | time, a two-element vector, Hz | ||
| − | + | ||
parameters.cp_dur - duration of the contact time, s | parameters.cp_dur - duration of the contact time, s | ||
| − | + | ||
parameters.rho0 - initial state, the state of the | parameters.rho0 - initial state, the state of the | ||
low-gamma spins will be wiped | low-gamma spins will be wiped | ||
| − | + | ||
parameters.coil - detection state | parameters.coil - detection state | ||
| − | + | ||
| + | parameters.sweep - sweep width for the FID, Hz | ||
| + | |||
| + | parameters.npoints - number of points in the FID | ||
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H - Hamiltonian matrix, received from context function | H - Hamiltonian matrix, received from context function | ||
| − | + | ||
R - relaxation superoperator, received from context function | R - relaxation superoperator, received from context function | ||
| − | + | ||
K - kinetics superoperator, received from context function | K - kinetics superoperator, received from context function | ||
==Outputs== | ==Outputs== | ||
| − | + | fid - signal detected on the coil state during | |
system evolution | system evolution | ||
==Examples== | ==Examples== | ||
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Below is the output of examples/nmr_solids/cp_acquire_mas_gly.m example file, showing 1H-13C cross-polarisation followed by acquisition under magic angle spinning in alpha-glycine powder. | Below is the output of examples/nmr_solids/cp_acquire_mas_gly.m example file, showing 1H-13C cross-polarisation followed by acquisition under magic angle spinning in alpha-glycine powder. | ||
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==See also== | ==See also== | ||
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[[Built-in_experiments#Solid_state_NMR_experiments|Solid state NMR experiments]] | [[Built-in_experiments#Solid_state_NMR_experiments|Solid state NMR experiments]] | ||
Revision as of 15:05, 5 April 2026
Cross-polarisation experiment in the rotating frame, followed by time-domain FID acquisition. The CP stage is preceded by wiping of the low-gamma spins and followed by FID acquisition with decoupling of the high-gamma spins.
Syntax
fid=cp_acquire_soft(spin_system,parameters,H,R,K)
Arguments
parameters.spins - working spins, a cell array of
strings with high-gamma spin fi-
rst, and low-gamma spin last,
for example {'1H','13C'}
parameters.hi_pwr - nutation frequency of the exci-
tation pulse on the high-gamma
channel, Hz
parameters.cp_pwr - nutation frequencies on the two
channels during the CP contact
time, a two-element vector, Hz
parameters.cp_dur - duration of the contact time, s
parameters.rho0 - initial state, the state of the
low-gamma spins will be wiped
parameters.coil - detection state
parameters.sweep - sweep width for the FID, Hz
parameters.npoints - number of points in the FID
H - Hamiltonian matrix, received from context function
R - relaxation superoperator, received from context function
K - kinetics superoperator, received from context function
Outputs
fid - signal detected on the coil state during
system evolution
Examples
Below is the output of examples/nmr_solids/cp_acquire_mas_gly.m example file, showing 1H-13C cross-polarisation followed by acquisition under magic angle spinning in alpha-glycine powder.
See also
cp_contact_soft.m, cp_contact_hard.m, overtone_cp.m
Version 2.9, authors: Marina Carravetta, Phil Williamson, Guinevere Mathies, Ilya Kuprov
