T. N. Rudakov, V. T. Mikhal’tsevich, V. V. Fedotov, and A. V. Belyakov
Kaliningrad University, ul. A. Nevskogo 14, Kaliningrad, 236041 Russia
Received June 8, 2000
Abstract—A simple and rather efficient method is proposed for improving the uniformity of the RF field gen-
erated by a surface helical coil with nonlinearly distributed turns. An optimal law of the distribution of the turns
of a helical coil is suggested. The results of a computer simulation of the field produced by this coil are pre-
sented and compared with the data for a conventionally used coil in the form of a linear spiral. The coils were
tested during detection of nuclear quadrupole resonance signals on 14N nuclei in a (CH2)6N4 polycrystal and
demonstrated the efficiency of the technique proposed for improving the field uniformity.
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