Ultracold neutron accumulation in a superfluid-helium converter with magnetic multipole reflector

被引：22
|
作者：
Zimmer, O. [1 ]
Golub, R. [2 ]
机构：
[1] Inst Laue Langevin, F-38042 Grenoble, France
[2] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA
来源：
PHYSICAL REVIEW C | 2015年 / 92卷 / 01期
关键词：
DIAMOND-LIKE CARBON; ELECTRIC-DIPOLE MOMENT; COLD NEUTRONS; LIQUID-HELIUM; SLOW NEUTRONS; UCN TRAP; STORAGE; HE-4; LIFETIME; PHYSICS;
D O I：
10.1103/PhysRevC.92.015501
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We analyze the accumulation of ultracold neutrons (UCNs) in a superfluid-helium converter vessel surrounded by a magnetic multipole reflector. We solved the spin-dependent rate equation, employing formulas valid for adiabatic spin transport of trapped UCNs in mechanical equilibrium. Results for saturation UCN densities are obtained in dependence of order and strength of the multipolar field. The addition of magnetic storage to neutron optical potentials can increase the density and energy of the low-field-seeking UCNs produced and serves to mitigate the effects of wall losses on the source performance. It also can provide a highly polarized sample of UCNs without need to polarize the neutron beam incident on the converter. This work was performed in preparation of the UCN source project SuperSUN at the Institut Laue-Langevin.
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页数：11
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