Equipment for Neutron EDM Experiment at RCNP

未来几年，TRIUMF将建造和开发一种新的高密度超冷中子源。使用该装置的初步实验是一种新的中子电偶极矩测量(NEDM)。NEDM的非零值将违反时间反转对称性。通过寻求解释宇宙物质-反物质不对称性的标准模型扩展，预测了CP破坏的新来源。该项目由日本的JSPS、KEK、RCNP和加拿大的CFI(温尼伯大学)资助。谅解备忘录于2011年1月签署，该项目已正式启动。改进后的UCN的初步冷却测试于今年秋天开始，并将为2013年和2014年的原型中子电火花实验做好准备。目前的RTI赠款申请是为RCNP的原型电火花加工实验建造关键部件：远程液氦传输系统、数据采集和慢速控制系统以及UCN探测器。在项目的RCNP原型阶段完成后，这些组件将与UCN源一起转移到TRIUMF。

A new high-density ultracold neutron (UCN) source will be constructed and developed at TRIUMF over the coming years. The initial experiment using the facility is a new measurement of the neutron electric dipole moment (nEDM). A non-zero value of the nEDM would violate time-reversal symmetry. New sources of CP-violation are predicted by the standard model extensions which seek to explain the matter-antimatter asymmetry of the universe. The project is funded by JSPS in Japan, KEK, RCNP, and CFI in Canada (the University of Winnipeg). The MOU was signed in January 2011, and the project has officially started. An initial cooling test of the improved UCN started this fall, and will be ready for the prototype neutron EDM experiment in 2013 and 2014. The present RTI grant request is for the construction of key components for the prototype EDM experiment at RCNP: Remote liquid helium transfer system, DAQ and slow control system, and UCN detector. These components will move to TRIUMF with the UCN source after completion of the RCNP prototype phase of the project.