High power pulsed dynamic nuclear polarisation at 94 GHz
High power pulsed dynamic nuclear polarisation at 94 GHz
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DOI：
10.1039/c002251a
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发表时间：
2010-01-01
影响因子：
3.3
通讯作者：
Smith, Graham M.
中科院分区：
文献类型：
--
作者：
Hunter, Robert I.;Cruickshank, Paul A. S.;Smith, Graham M.
在这篇通讯中，我们报告了使用94 GHz高功率脉冲技术对大体积样品进行固态动态核极化（DNP）的初步结果。结果表明，在相同的平均功率下，与连续波（cw）激励相比，在快速重复率下，短脉冲（相当于pi/2脉冲长度）的激励可以获得更高的DNP增强。峰值增强是在平均功率只有几百兆瓦的情况下观察到的。
In this communication we report initial results using high power pulsed techniques at 94 GHz to perform solid state Dynamic Nuclear Polarisation (DNP) on high volume samples. It is shown that excitation with short pulses, comparable to the pi/2 pulse length, at fast repetition rates can result in higher DNP enhancements relative to continuous wave (cw) excitation for the same average power. Peak enhancements are observed at an average power of only a few hundred mW delivered to the sample.