论文标题
$^3 $ He中子旋转过滤器在J-PARC的开发和应用
Development and application of a $^3$He Neutron Spin Filter at J-PARC
论文作者
论文摘要
我们正在开发一个具有偏振$^3 $ HE气体的中子偏振器，该偏光层基于日本Proton Proton Proton Accelerator Research Compecy（J-Parc）的材料和生命科学实验设施（MLF）的旋转交换光学泵（SEOP），用于旋转交换光学泵（SEOP）。在J-Parc建造了一个$^3 $ HE燃气站，使用燃气站制造了几个$^3 $ HE牢房，其旋转放松时间很长。已经在MLF梁厅准备了一个实验室，以使$^3 $ HE细胞偏振，并开发了可以安装在中子梁线上的30 〜W和110〜W的紧凑型抽水系统。通过使用110〜W激光器，在中子梁线上实现了$^3 $ HE的极化为85％。最近，使用了$^3 $ HE SPIN过滤器的第一个用户实验，此后再进行了几个。据报道，J-PARC的MLF的旋转过滤器的开发和利用。
We are developing a neutron polarizer with polarized $^3$He gas, referred to as a $^3$He spin filter, based on the Spin Exchange Optical Pumping (SEOP) for polarized neutron scattering experiments at Materials and Life Science Experimental Facility (MLF) of Japan Proton Accelerator Research Complex (J-PARC). A $^3$He gas-filling station was constructed at J-PARC, and several $^3$He cells with long spin relaxation times have been fabricated using the gas-filling station. A laboratory has been prepared in the MLF beam hall for polarizing $^3$He cells, and compact pumping systems with laser powers of 30~W and 110~W, which can be installed onto a neutron beamline, have been developed. A $^3$He polarization of 85% was achieved at a neutron beamline by using the pumping system with the 110~W laser. Recently, the first user experiment utilizing the $^3$He spin filter was conducted, and there have been several more since then. The development and utilization of $^3$He spin filters at MLF of J-PARC are reported.
