Chaotic scattering and escape times of marginally trapped ultracold neutrons
Chaotic scattering and escape times of marginally trapped ultracold neutrons
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DOI：
10.6028/jres.110.055
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发表时间：
2005-07-01
影响因子：
1.5
通讯作者：
Huffman, PR
中科院分区：
文献类型：
--
作者：
Coakley, KJ;Doyle, JM;Huffman, PR
利用辛积分方法计算了超冷中子在超导Ioffe型磁阱中的经典轨道。我们发现，对于一组特定的初始条件（动量和位置）的计算逃逸时间一般不稳定的时间步长参数减少，除非逃逸时间很短（小于约10秒）。对于超过一半的逃逸时间计算的UCN实现的能量间隔在数值上很好地确定，我们预测的中值逃逸时间作为一个函数的中点的间隔。
We compute classical trajectories of Ultracold neutrons (UCNs) in a superconducting Ioffe-type magnetic trap using a symplectic integration method. We find that the computed escape time for a particular set of initial conditions (momentum and position) does not generally stabilize as the time step parameter is reduced unless the escape time is short (less than approximately 10 s). For energy intervals where more than half of the escape times computed for UCN realizations are numerically well determined, we predict the median escape time as a function of the midpoint of the interval.