论文标题
MUON梁横向相位压缩的演示
Demonstration of Muon-Beam Transverse Phase-Space Compression
论文作者
论文摘要
我们证明了12.5 MeV/c muon束的有效横向压缩在氦气靶中停止，其垂直密度梯度和交叉电场和磁场。垂直延伸超过14毫米的MUON停止分布在3.5 $μ$ s之内降低至0.25 mm尺寸（RMS）。模拟包括低能$μ^+$ - $ \ text {he} $弹性和电荷交换（$μ^+\ leftrightArrow $ muonium）碰撞碰撞的模拟很好地描述了测量结果。通过将横向压缩阶段与先前证明的纵向压缩阶段相结合，我们可以将$μ^+ $ beam的相空间密度提高到$ 10^{10} $的$ 10^{ - 3} $效率。
We demonstrate efficient transverse compression of a 12.5 MeV/c muon beam stopped in a helium gas target featuring a vertical density gradient and crossed electric and magnetic fields. The muon stop distribution extending vertically over 14 mm was reduced to a 0.25 mm size (RMS) within 3.5 $μ$s. The simulation including cross sections for low-energy $μ^+$-$\text{He}$ elastic and charge exchange ($μ^+\leftrightarrow $ muonium) collisions describes the measurements well. By combining the transverse compression stage with a previously demonstrated longitudinal compression stage, we can improve the phase space density of a $μ^+ $ beam by a factor of $ 10^{10} $ with $ 10^{-3} $ efficiency.
