论文标题
关于用液态氦膜覆盖的陷阱中超低中子的存储时间显着增加的可能性
On the possibility of a significant increase in the storage time of ultracold neutrons in traps coated with a liquid helium film
论文作者
论文摘要
结果表明，可以用超流体氦膜覆盖的陷阱的粗糙内壁比超过氦的深度薄膜覆盖，超过超速中子进入氦气的深度要厚得多。这种涂层应降低由数量级吸收陷阱壁的吸收率损失的超低中子的损失率。证明三角形粗糙度比矩形更有效，对于降低了超低中子的损失率。三角形粗糙度在技术上更容易实施，这种衍射光栅是在工业上制造的。提出了其他方法来增加保护性氦膜的厚度。
It is shown that rough inner walls of a trap of ultracold neutrons can be coated with a superfluid helium film much thicker than the depth of penetration of ultracold neutrons into helium. This coating should reduce the rate of loss of ultracold neutrons caused by absorption in the walls of the trap by orders of magnitude. It is demonstrated that triangular roughness is more efficient than rectangular for the reduction of the rate of loss of ultracold neutrons. Triangular roughness is more easily implemented technically and such diffraction gratings are fabricated industrially. Other methods are proposed to increase the thickness of the protective helium film.
