
New TopShim run:

version = topshim 4.4.0
date = 2026-10-06
time = 09:02:05.179
command = topshim 1d optsolvent coil=1H optsolvent tuneaoff hrmas

HRMAS SHIMMING

Parameters:

probe = Z180004_0001
angle PHI = 270.5 degree
solvent = H2O+D2O
shim nucleus = 1H
nucleus optimised for = 1H
o1p (from lock) = 4.70 ppm

Results:

Iteration 1: FWHM Before= 0.4 Hz, Target= 0.2 Hz, After= 8.3 Hz
Iteration 2: FWHM Before= 8.3 Hz, Target= 0.2 Hz, After=90.1 Hz
Iteration 3: FWHM Before=90.1 Hz, Target= 1.0 Hz, After= 0.3 Hz
Iteration 4: FWHM Before= 0.3 Hz, Target= 0.5 Hz, After=38.9 Hz
Iteration 5: FWHM Before=38.9 Hz, Target= 0.9 Hz, After= 1.7 Hz
Rejecting all results and reverting to the initial shim state.

Lineshape quality factor (1D spectrum, MAS) = 0.773


Unusually slow convergence behaviour detected during shimming.
This may be indicative of an incorrect mounting angle being used!
1. Please perform 'topshim calreset'
2. Restart topshim
3. Enter the correct value for the mounting angle


MAS shims:
Z'	-15413
Z2'	+94965
Z3'	-48974
Z4'	+0


duration = 1 min 53 sec
completed successfully
finished Tue Oct  6 09:03:57 2026


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