Supporting Information
Establishing resolution-improved NMR spectroscopy in high
magnet fields with unknown spatiotemporal variations
Zhiyong Zhang1, Pieter E. S. Smith2, Shuhui Cai1, Zhenyao Zheng1, Yulan Lin1,* & Zhong
Chen1,*
1
Department of Electronic Science, State Key Laboratory of Physical Chemistry of Solid
Surfaces, Xiamen University, Xiamen, China
2
Chemical Physics Department, Weizmann Institute of Science, Rehovot, Israel
Correspondence and requests for materials should be addressed to Z.C. (email:
chenz@xmu.edu.cn) or Y.L. (email: lylfj2005@xmu.edu.cn)
Generation of magnetic field instability
A home-made circuit unit was connected to the Z0 shimming coil power supply (Fig. S1a),
which in conventional NMR spectrometers adjusts the deuterium lock frequency. The circuit
was
designed
to
mimic
the
fluctuating
fields
observed
in
resistive
and
resistive-superconducting hybrid magnets. The input to the circuit (Fig. S1b) was generated
by simple signal generators (Fig. S1c) and a noise source (Fig. S1d). All the frequencies and
intensities were adjusted to experimentally model the temporal instability of resistive and
resistive-superconducting hybrid magnets 1, 2.
FIG. S1 Home-made circuit to connect the Z0 shimming coil power supply. (a) The circuit
inside the shimming unit of Agilent VNMRS® console (Santa Clara, CA). (b) The outside
signal input connected with the shimming unit of console. To experimentally model the
temporal instability of resistive and resistive-superconducting hybrid magnets, the modulated
input signals applied with (c) several simple signal generators and (d) an input noise source.
References
[1] T. Iijima et al., J. Magn. Reson. 184 (2007).
[2] Z. H. Gan et al., J. Magn. Reson. 191 (2008).