Improved compensation and measurement of the magnetic gradients in an atomic vapor cell
Improved compensation and measurement of the magnetic gradients in an atomic vapor cell
复制标题
改进原子蒸气室中磁梯度的补偿和测量
DOI：
10.1063/1.5127032
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发表时间：
2020-04
期刊：
影响因子：
1.6
通讯作者：
Luo Hui
中科院分区：
文献类型：
--
作者：
Zhan Xiang;Chen Chang;Wang Zhiguo;Jiang Qiyuan;Zhang Yi;Luo Hui
磁场梯度降低了核自旋的横向弛豫时间，这通常会降低基于核自旋的原子传感器的灵敏度。我们证明了改进的磁场梯度补偿，同时施加一阶和二阶磁场梯度在一个立方蒸汽细胞含有87 Rb蒸汽和129 Rb气体。与只施加一阶磁梯度补偿相比，同时施加一阶和二阶磁梯度补偿时，129 Ω的横向弛豫时间延长了4.3倍，表明在我们的实验中，联合补偿大大抑制了总磁梯度。极化87Rb自旋，静磁场，和剩余磁场引起的磁场梯度也进行了探讨。作为内部磁不均匀性的主要来源，这些梯度被实验验证为具有相当大的值。此外，当适当地设置这些内部梯度分量的方向时，系统中的总内部磁梯度可以自补偿。本文的实验结果对抑制核磁共振系统中的磁场梯度和优化梯度补偿具有重要意义。
Magnetic field gradients reduce the transverse relaxation time of nuclear spins, which usually degrades the sensitivity of atomic sensors based on nuclear spins. We demonstrate improved magnetic field gradient compensation by applying first-order and second-order magnetic gradients simultaneously in a cubic vapor cell containing 87Rb vapor and 129Xe gas. Compared with applying only first-order magnetic gradient compensation, the transverse relaxation time of 129Xe is up to 4.3 times longer when applying both first-order and second-order compensating magnetic gradients, which indicates that the total magnetic gradient is greatly suppressed by the joint compensation in our experiment. The magnetic gradients induced by the polarized 87Rb spins, the static magnetic field, and the residual magnetic field are also explored. As the main sources of internal magnetic inhomogeneities, these gradients are experimentally validated to have a sizable value. Furthermore, the total internal magnetic gradient in the system could be self-compensated when the directions of these internal gradient components are appropriately set. The experimental results in this paper are important for suppressing the magnetic gradients and optimizing the gradient compensation in nuclear magnetic resonance systems.
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影响因子：
8.6
作者：
Newbury;Barton;Bogorad;Cates;Gatzke;Saam;Han;Holmes;Souder;Xu;Benton
通讯作者：
Newbury;Barton;Bogorad;Cates;Gatzke;Saam;Han;Holmes;Souder;Xu;Benton
影响因子：
2.6
作者：
X. Zeng;E. Miron;W. A. Wijngaarden;D. Schreiber;W. Happer
通讯作者：
X. Zeng;E. Miron;W. A. Wijngaarden;D. Schreiber;W. Happer
DOI：
10.1140/epjd/e2006-00050-2
发表时间：
2006-03
期刊：
The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
影响因子：
--
作者：
Jörg Schmiedeskamp;Werner Heil;Ernst W. Otten;R. Kremer;A. Simón;J. Zimmer
通讯作者：
Jörg Schmiedeskamp;Werner Heil;Ernst W. Otten;R. Kremer;A. Simón;J. Zimmer
DOI：
10.1103/physreva.42.2774
发表时间：
1990-09
期刊：
Physical review. A, Atomic, molecular, and optical physics
影响因子：
--
作者：
Wu;Happer;Kitano;Daniels
通讯作者：
Wu;Happer;Kitano;Daniels
影响因子：
8.6
作者：
Sheng, D.;Kabcenell, A.;Romalis, M. V.
通讯作者：
Romalis, M. V.