Serebrov A, Rudnev Yu, Murashkin A, Zherebtsov O, Kharitonov A, Korolev V, Morozov T, Fomin A, Pusenkov V, Schebetov A, Varlamov V
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
J Res Natl Inst Stand Technol. 2005 Aug 1;110(4):383-7. doi: 10.6028/jres.110.057. Print 2005 Jul-Aug.
We are going to use a polarized cold neutron beam and an axial magnetic field in the shape of a bottle formed by a superconducting magnetic system. Such a configuration of magnetic fields allows us to extract the decay electrons inside a well-defined solid angle with high accuracy. An electrostatic cylinder with a potential of 25 kV defines the detected region of neutron decays. The protons, which come from this region will be accelerated and registered by a proton detector. The use of coincidences between electron and proton signals will allow us to considerably suppress the background. The final accuracy of the A-asymmetry will be determined by the uncertainty of the neutron beam polarization measurement which is at the level of (1-2) × 10(-3), as shown in previous studies.
我们将使用极化冷中子束和由超导磁体系统形成的瓶状轴向磁场。这种磁场配置使我们能够在定义明确的立体角内高精度地提取衰变电子。一个具有25 kV电势的静电圆筒定义了中子衰变的探测区域。来自该区域的质子将被质子探测器加速并记录。利用电子和质子信号之间的符合测量将使我们能够显著抑制本底。如先前研究所示，A不对称性的最终精度将由中子束极化测量的不确定性决定，其不确定性在(1 - 2)×10⁻³的水平。
