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arXiv physics/0501071physics.acc-phhep-ex
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用桌面环冷却6D电离μ子

6D Ionization Muon Cooling with Tabletop Rings

D. J. Summers, S. B. Bracker, L. M. Cremaldi, R. Godang, D. B. Cline, A. A. Garren, G. G. Hanson, A. Klier, S. A. Kahn, H. G. Kirk, R. B. Palmer

摘要:

介绍了用相对较小的磁环实现六维μ子电离冷却的研究进展。正在探索的晶格包括具有边缘聚焦和强聚焦的缩放扇区回旋加速器,固定场交变梯度(FFAG)环。电离冷却由高压氢气提供,其去除横向和纵向动量。使用射频(RF)腔体取代损失的纵向动量,从而减少净横向发射度。较高动量μ子在氢中的较长路径长度以牺牲横向发射度为代价降低纵向发射度。因此,发射度交换允许这些环在所有六个维度上冷却,而不仅仅是横向冷却。或者,如果RF位于环之后,则可以通过阻止μ子螺旋旋转进入中央群来冷却μ子。当动量为零时,动量扩散也为零。由此产生的冷却μ子可以导致强烈的μ子束,这可能是中微子工厂或μ子对撞机的来源。

英文摘要:

Progress on six dimensional ionization muon cooling with relatively small rings of magnets is described. Lattices being explored include scaling sector cyclotrons with edge focusing and strong focusing, fixed field alternating gradient (FFAG) rings. Ionization cooling is provided by high pressure hydrogen gas which removes both transverse and longitudinal momentum. Lost longitudinal momentum is replaced using radio frequency (RF) cavities, giving a net transverse emittance reduction. The longer path length in the hydrogen of higher momentum muons decreases longitudinal emittance at the expense of transverse emittance. Thus emittance exchange allows these rings to cool in all six dimensions and not just transversely. Alternatively, if the RF is located after the ring, it may be possible to cool the muons by stopping them as they spiral adiabatically into a central swarm. As momentum goes to zero, the momentum spread goes to zero. The resulting cooled muons can lead to an intense muon beam which could be a source for neutrino factories or muon colliders.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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