论文标题
Fermilab Muon $ G-2 $的磁场分析
Magnetic Field Analysis for Fermilab Muon $g-2$
论文作者
论文摘要
与Brookhaven（E821）实验相比，Fermilab上的MUON G-2实验E989测量了Muon $A_μ$的异常磁矩，具有提高的精度。 Brookhaven的结果与标准模型的张力高于$3σ$。 $A_μ$的确定需要测量MUON异常频率，$ω_A$和磁场，$ \ MATHBF {B} $，将Muons限制在存储环中。通过一组协调的核磁共振（NMR）测量来监测该场。在存储区域上方和下方的固定位置的NMR探针不断监视该场。配备17 NMR探针的Vacuum手推车映射了MUON存储区域，并且一种特殊的水基NMR探针为手推车探针提供了校准。该介绍的重点是确定时间依赖性场图从结合固定探针测量和手推车图的确定。将场图与MUON分布相结合，以得出测量过程中MUON观察到的平均场。这些程序将涵盖第一个数据运行的分析。
The Muon g-2 experiment E989 at Fermilab measures the anomalous magnetic moment of the muon $a_μ$ with improved precision compared to the Brookhaven (E821) experiments. The Brookhaven results are in tension with the Standard Model by more than $3σ$. The determination of $a_μ$ requires the measurement of both the muon anomaly frequency, $ω_a$, and the magnetic field, $\mathbf{B}$, that confines muons in a storage ring. The field is monitored by a set of coordinated nuclear magnetic resonance (NMR) measurements. NMR probes at fixed locations above and below the storage region constantly monitor the field. An in-vacuum trolley equipped with 17 NMR probes maps the muon storage region, and a special water-based NMR probe provides the calibration for the trolley probes. This presentation focuses on the determination of the time-dependent field maps from combining the fixed probe measurements and the trolley maps. The field maps are combined with the muon distribution to derive the average field observed by the muons during the measurement. These proceedings will cover the analysis from the first data run.
