
New TopShim run:

version = topshim 4.4.0
date = 2026-09-21
time = 15:46:37.404
command = topshim 1d optsolvent coil=1H optsolvent tuneaoff hrmas

HRMAS SHIMMING

Parameters:

probe = Z180004_0001
angle PHI = 270.5 degree
solvent = D2O
shim nucleus = 2H
nucleus optimised for = 1H
o1p (from lock) = 4.70 ppm

Results:

echo time must be reduced
echo time must be reduced
Iteration 1: FWHM Before= 1.4 Hz, Target= 0.2 Hz, After= 0.4 Hz
Iteration 2: FWHM Before= 0.4 Hz, Target= 1.4 Hz, After= 0.8 Hz
Iteration 3: FWHM Before= 0.8 Hz, Target= 0.5 Hz, After=255.6 Hz
Iteration 4: FWHM Before=255.6 Hz, Target= 0.4 Hz, After=266.0 Hz
Iteration 5: FWHM Before=266.0 Hz, Target= 3.5 Hz, After= 0.4 Hz
Rejecting all results and reverting to the initial shim state.

Lineshape quality factor (1D spectrum, MAS) = 1.6


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'	-16001
Z2'	+92154
Z3'	-46373
Z4'	+0


duration = 7 min 59 sec
completed successfully
finished Mon Sep 21 15:54:35 2026


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