Dissolution dynamic nuclear polarization (dDNP) has become a hyperpolarization method of choice for enhancing nuclear magnetic resonance (NMR) signals. Nuclear spins are polarized in solid frozen samples (in a so-called polarizer) that are subsequently dissolved and transferred to an NMR spectrometer for high sensitivity detection. One of the critical challenges of dDNP is that it requires both a fast transfer to limit nuclear spin relaxation losses as well as stability to guarantee high resolution (no bubbles nor turbulences). Here we describe the design, construction and performances of such a transfer and injection system, that features a 5 m/s speed and sub-Hz spectral resolution upon arrival at the detection spot. We demonstrate the use of such a system for inter-magnet distances of up to 10 m.

溶解动态核极化 ( d DNP) 已成为增强核磁共振 (NMR) 信号的首选超极化方法。核自旋在固体冷冻样品（在所谓的偏振器中）被极化，随后溶解并转移到 NMR 光谱仪进行高灵敏度检测。d的关键挑战之一DNP 既需要快速转移以限制核自旋弛豫损失，也需要稳定性以保证高分辨率（无气泡或湍流）。在这里，我们描述了这种传输和注入系统的设计、构造和性能，该系统在到达检测点时具有 5 m/s 的速度和亚赫兹的光谱分辨率。我们演示了使用这种系统来实现长达 10 m 的磁体间距离。