Difference between revisions of "Spendosy.m"

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{{DISPLAYTITLE:spendosy.m}} __NOTOC__
 
{{DISPLAYTITLE:spendosy.m}} __NOTOC__
Ultrafast DOSY pulse sequence. Syntax:
+
Ultrafast DOSY pulse sequence.  
 
 
    fid=spendosy(spin_system,parameters,H,R,K,G,F)
 
 
 
The following parameters are required
 
 
 
parameters.dims          size of the sample in m
 
 
parameters.npts          number of spin packets
 
 
parameters.spins          nuclei on which the sequence runs
 
 
parameters.deltat        timestep for acquisition
 
 
parameters.npoints        number of acquired points for each
 
                          gradient readout
 
 
parameters.nloops        number of loop, where each loop consists of
 
                          a positive and a negative readout
 
 
parameters.offset        offset
 
 
parameters.cond          bondary conditions
 
 
parameters.Ga            acquisition gradient in T/m
 
 
parameters.pulsenpoints  number of points in the pulse shape
 
 
parameters.smfactor      smoothing factor for the pulse
 
 
parameters.Te            duration of the pulse
 
 
parameters.Tau            duration extra dephasing gradient
 
 
parameters.BW            bandwidth of the pulse
 
 
parameters.Ge            encoding gradient in T/m
 
 
parameters.chirptype      can be 'wurst' or 'smoothed'
 
 
 
parameters.td            diffusion delay
 
 
H                        Fokker-Planck Hamiltonian
 
 
R                        Fokker-Planck relaxation superoperator
 
 
K                        Fokker-Planck kinetics superoperator
 
 
G                        Fokker-Planck gradient superoperators
 
 
F                        Fokker-Planck diffusion and flow superoperator
 
 
Note: the last five parameters are built automatically by [[imaging.m]] context function when this sequence is called from that [[Kernel_contexts|context]].
 
  
 
==Syntax==
 
==Syntax==

Revision as of 18:39, 5 June 2026

Ultrafast DOSY pulse sequence.

Syntax

    fid=spendosy(spin_system,parameters,H,R,K,G,F)

Arguments

    parameters.dims           size of the sample in m

    parameters.npts           number of spin packets

    parameters.spins          nuclei on which the sequence runs

    parameters.deltat         timestep for acquisition

    parameters.npoints        number of acquired points for each
    gradient readout

    parameters.nloops         number of loop, where each loop consists of
    a positive and a negative readout

    parameters.offset         offset

    parameters.cond           bondary conditions

    parameters.Ga             acquisition gradient in T/m

    parameters.pulsenpoints   number of points in the pulse shape

    parameters.smfactor       smoothing factor for the pulse

    parameters.Te             duration of the pulse

    parameters.Tau            duration extra dephasing gradient

    parameters.BW             bandwidth of the pulse

    parameters.Ge             encoding gradient in T/m

    parameters.chirptype      can be 'wurst' or 'smoothed'

    parameters.td             diffusion delay

    H                         Fokker-Planck Hamiltonian

    R                         Fokker-Planck relaxation superoperator

    K                         Fokker-Planck kinetics superoperator

    G                         Fokker-Planck gradient superoperators

    F                         Fokker-Planck diffusion and flow superoperator

Outputs

    fid - free induction decay

See also

idosyzs.m, dosy_oneshot.m, psycosy.m, Ultrafast, pure-shift, and diffusion NMR

Version 1.9, authors: Jean-Nicolas Dumez, Ilya Kuprov, Ludmilla Guduff