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本文介绍了通过选择相干传递路径来计算相位循环的理论依据。在此基础上提出了一个计算机程序PHASE.BAS用于计算相位循环。使用此程序设计了一个128步的相循环用于一维和二维INADEQUATE实验。实验结果表明此相循环能很好地消除单量子信号、压制t_1噪声,其效果明显优于Bruker MSL脉冲序列库中的32次循环的结果。
This article describes the theoretical basis for calculating the phase cycle by choosing coherent transfer paths. On this basis, a computer program PHASE.BAS is proposed for calculating the phase cycle. Use this procedure to design a 128-step phase loop for one-dimensional and two-dimensional INADEQUATE experiments. Experimental results show that this phase cycle can eliminate single quantum signal and suppress t_1 noise well, which is obviously better than 32 cycles in Bruker MSL pulse sequence library.