
New TopShim run:

version = topshim 4.4.0
date = 2026-09-22
time = 12:03:02.299
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=173.8 Hz
Iteration 2: FWHM Before=173.8 Hz, Target= 0.3 Hz, After= 0.3 Hz
Iteration 3: FWHM Before= 0.3 Hz, Target= 0.4 Hz, After= 0.4 Hz
Iteration 4: FWHM Before= 0.4 Hz, Target= 0.3 Hz, After=172.3 Hz
Iteration 5: FWHM Before=172.3 Hz, Target= 0.3 Hz, After= 4.0 Hz
Rejecting all results and reverting to the initial shim state.

Lineshape quality factor (1D spectrum, MAS) = 2.38


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'	-16029
Z2'	+92154
Z3'	-70016
Z4'	+0


duration = 1 min 57 sec
completed successfully
finished Tue Sep 22 12:04:58 2026


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