Toward precision polarimetry of dense polarized 3He targets
Toward precision polarimetry of dense polarized 3He targets
复制标题
致密偏振 3He 靶材的精密偏振测量
DOI：
10.1016/s0168-9002(97)00847-4
复制
发表时间：
1998
影响因子：
1.4
通讯作者：
R. Welsh
中科院分区：
文献类型：
--
作者：
M. Romalis;P. Bogorad;G. Cates;T. Chupp;K. Coulter;E. Hughes;J. Johnson;Nicolas Produit;T. Smith;A. Thompson;R. Welsh
我们描述了几种新的测量和分析技术，用于在最近完成的中子自旋结构函数 g1nat SLAC (E-154) 测量中确定 3He 靶的极化。使用两种独立的方法测定极化。第一种方法使用绝热快速通道的标准技术，通过测量水样中的玻尔兹曼偏振进行校准。我们描述了影响该校准过程的几种系统效应。第二种方法使用由于 3 He 的极化而引起的 Rb 塞曼共振频率的偏移。详细讨论了该技术的实施和校准。最后，使用两种独立的方法测量电池中 3 He 的密度，其中一种基于 3 He 导致的 Rb D1 和 D2 线的压力展宽。
We describe several new measurement and analysis techniques used to determine the polarization of the3He target in a recently completed measurement of the neutron spin structure function g1nat SLAC (E-154). The polarization was determined using two independent methods. The first method used a standard technique of Adiabatic Fast Passage, calibrated by a measurement of Boltzmann polarization in a sample of water. We describe several systematic effects affecting this calibration procedure. The second method used a shift of the Rb Zeeman resonance frequency due to the polarization of3He. Implementation and calibration of this technique are discussed in detail. Finally, the density of3He in the cell was measured using two independent methods, one of them based on the pressure broadening of Rb D1and D2lines due to3He.