Meier Benno, Kohlrautz Jonas, Haase Jürgen, Braun Marco, Wolff-Fabris Frederik, Kampert Erik, Herrmannsdörfer Thomas, Wosnitza Joachim
University of Leipzig, Faculty of Physics and Earth Science, Linnéstrasse 5, 04103 Leipzig, Germany.
Rev Sci Instrum. 2012 Aug;83(8):083113. doi: 10.1063/1.4746988.
A nuclear magnetic resonance apparatus for experiments in pulsed high magnetic fields is described. The magnetic field pulses created together with various magnet coils determine the requirements such an apparatus has to fulfill to be operated successfully in pulsed fields. Independent of the chosen coil it is desirable to operate the entire experiment at the highest possible bandwidth such that a correspondingly large temporal fraction of the magnetic field pulse can be used to probe a given sample. Our apparatus offers a bandwidth of up to 20 MHz and has been tested successfully at the Hochfeld-Magnetlabor Dresden, even in a very fast dual coil magnet that has produced a peak field of 94.2 T. Using a medium-sized single coil with a significantly slower dependence, it is possible to perform advanced multi-pulse nuclear magnetic resonance experiments. As an example we discuss a Carr-Purcell spin echo sequence at a field of 62 T.
描述了一种用于脉冲高磁场实验的核磁共振装置。与各种磁体线圈一起产生的磁场脉冲决定了这种装置在脉冲场中成功运行必须满足的要求。无论选择何种线圈，都希望在尽可能高的带宽下进行整个实验，以便可以使用磁场脉冲中相应较大的时间部分来探测给定样品。我们的装置提供高达20 MHz的带宽，并且已经在德累斯顿高场磁体实验室成功进行了测试，即使是在产生94.2 T峰值场的非常快速的双线圈磁体中。使用具有明显较慢依赖性的中型单线圈，可以进行先进的多脉冲核磁共振实验。作为一个例子，我们讨论了在62 T场强下的 Carr-Purcell 自旋回波序列。
