The role of antihydrogen formation in the radial transport of antiprotons in positron plasmas

The role of antihydrogen formation in the radial transport of antiprotons in positron plasmas
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反氢形成在正电子等离子体中反质子径向传输中的作用

DOI:
10.1088/0953-4075/49/13/134004
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发表时间:
2016
期刊:
Atomic, Molecular and Optical Physics
影响因子:
--
通讯作者:
Jonsell S
Jonsell S
中科院分区:
--
文献类型:
--
作者:
Jonsell S

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模拟了在反氢形成实验所用的典型环境条件下,正电子等离子体中反质子的径向输运。探索的参数范围包括几个正电子密度和温度,以及两个不同的磁场(1和3 T)。在计算中,反氢的形成过程被人为地抑制,以便将其作用与其他碰撞源的输运隔离开来。结果表明,在最低的正电子等离子体温度下,反氢的形成和破坏的重复循环是径向(交叉磁场)输运的主要来源,这种现象是异常扩散的一个例子。
Simulations have been performed of the radial transport of antiprotons in positron plasmas under ambient conditions typical of those used in antihydrogen formation experiments. The parameter range explored includes several positron densities and temperatures, as well as two different magnetic fields (1 and 3 T). Computations were also performed in which the antihydrogen formation process was artificially suppressed in order to isolate its role from other collisional sources of transport. The results show that, at the lowest positron plasma temperatures, repeated cycles of antihydrogen formation and destruction are the dominant source of radial (cross magnetic field) transport, and that the phenomenon is an example of anomalous diffusion.
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