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Homospoil is a technique for dephasing transverse magnetization by application of a magnetic field gradient along z-axis. During the time the gradient is turned on, magnetic field along z has linear variation in the magnitude. Therefore, larmor frequency of the nuclei will have a corresponding variation.

After the homospoil pulse, transverse magnetization in the slices of sample will acquire additional phase, which will vary with height. Net x-y plane magnetization will be zero.

Homospoil in Varian NMR systems

In Varian NMR sytems homospoil gradient is provided by z1 room temperature shim coil.

Use of PFG coils on the probe (if available) is preferred.

Homospoil gradient is weaker than PFG and recovery times are longer.

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