Difference between revisions of "Spencosy.m"

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Ultrafast COSY pulse sequence. Syntax:
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{{DISPLAYTITLE:spencosy.m}} __NOTOC__
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Ultrafast COSY pulse sequence.  
  
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==Syntax==
  
 
     fid=spencosy(spin_system,parameters,H,R,K,G,F)
 
     fid=spencosy(spin_system,parameters,H,R,K,G,F)
  
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The following parameters are required
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==Parameters==
  
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parameters.dims          size of the sample in m
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    parameters.dims          size of the sample in m
 
   
 
   
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parameters.npts          number of spin packets
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    parameters.npts          number of spin packets
 
   
 
   
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parameters.spins          nuclei on which the sequence runs
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    parameters.spins          nuclei on which the sequence runs
 
   
 
   
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parameters.deltat        timestep for acquisition
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    parameters.deltat        timestep for acquisition
 
   
 
   
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parameters.npoints        number of acquired points for each  
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    parameters.npoints        number of acquired points for each
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                          gradient readout
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                              gradient readout
 
   
 
   
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parameters.nloops        number of loop, where each loop consists of  
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    parameters.nloops        number of loop, where each loop consists of
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                          a positive and a negative readout
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                              a positive and a negative readout
 
   
 
   
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parameters.Ga            acquisition gradient in T/m
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    parameters.Ga            acquisition gradient in T/m
 
   
 
   
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parameters.pulsenpoints  number of points in the pulse shape
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    parameters.pulsenpoints  number of points in the pulse shape
 
   
 
   
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parameters.nWURST        smoothing factor for the pulse
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    parameters.nWURST        smoothing factor for the pulse
 
   
 
   
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parameters.Te            duration of the pulse
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    parameters.Te            duration of the pulse
 
   
 
   
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parameters.BW            bandwidth of the pulse
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    parameters.BW            bandwidth of the pulse
 
   
 
   
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parameters.Ge            encoding gradient in T/m
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    parameters.Ge            encoding gradient in T/m
 
   
 
   
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parameters.Gp            coherence selection gradient in T/m
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    parameters.Gp            coherence selection gradient in T/m
 
   
 
   
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parameters.Tp            duration of the coherence selection gradient
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    parameters.Tp            duration of the coherence selection gradient
 
   
 
   
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parameters.D              diffusion constant, m^2/s
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    parameters.D              diffusion constant, m^2/s
 
   
 
   
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H                        Fokker-Planck Hamiltonian
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    H                        Fokker-Planck Hamiltonian
 
   
 
   
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R                        Fokker-Planck relaxation superoperator
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    R                        Fokker-Planck relaxation superoperator
 
   
 
   
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K                        Fokker-Planck kinetics superoperator
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    K                        Fokker-Planck kinetics superoperator
 
   
 
   
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G                        Fokker-Planck gradient superoperators
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    G                        Fokker-Planck gradient superoperators
 
   
 
   
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F                        Fokker-Planck diffusion and flow superoperator
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    F                        Fokker-Planck diffusion and flow superoperator
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==Outputs==
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    fid                      UFCOSY free induction decay
  
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Note: the last five parameters are built automatically by [[imaging.m]] context function when this sequence is called from that [[Kernel_contexts|context]].
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==Notes==
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The last five parameters are built automatically by the imaging context function.
  
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==See also==
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[[psycosy.m]], [[dpfgse_select.m]], [[dpfgse_suppress.m]], [[dosy_oneshot.m]], [[idosyzs.m]], [[psyche.m]], [[spendosy.m]], [[spendosycosy.m]], [[st_ideal.m]], [[ufmq.m]], [[Built-in_experiments]]
  
 
''Version 1.9, authors: [[Jean-Nicolas Dumez]], [[Ilya Kuprov]], [[Ludmilla Guduff]]''
 
''Version 1.9, authors: [[Jean-Nicolas Dumez]], [[Ilya Kuprov]], [[Ludmilla Guduff]]''

Latest revision as of 08:39, 30 August 2026

Ultrafast COSY pulse sequence.

Syntax

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

Parameters

    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.Ga             acquisition gradient in T/m

    parameters.pulsenpoints   number of points in the pulse shape

    parameters.nWURST         smoothing factor for the pulse

    parameters.Te             duration of the pulse

    parameters.BW             bandwidth of the pulse

    parameters.Ge             encoding gradient in T/m

    parameters.Gp             coherence selection gradient in T/m

    parameters.Tp             duration of the coherence selection gradient

    parameters.D              diffusion constant, m^2/s

    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                       UFCOSY free induction decay

Notes

The last five parameters are built automatically by the imaging context function.

See also

psycosy.m, dpfgse_select.m, dpfgse_suppress.m, dosy_oneshot.m, idosyzs.m, psyche.m, spendosy.m, spendosycosy.m, st_ideal.m, ufmq.m, Built-in_experiments

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