论文标题
在氢化锂中的隆隆的多重库仑散射
Multiple Coulomb Scattering of muons in Lithium Hydride
论文作者
论文摘要
当带电的颗粒遍历材料时,多个库仑散射(MCS)是一种众所周知的现象。在Muscat实验中制作的低$ Z $材料的兆粒测量结果表明,理论模型和仿真代码(例如Geant4(v7.0))过度估计了散射。 MUON电离冷却实验(小鼠)测量了横穿液态氢或氢化锂(LIH)能量吸收器的振荡束的冷却,以开发诸如中微子工厂或Muon Collider之类的MUON加速器设施的计划的一部分。吸收材料中发生的能量损失和MC是改变冷却通道性能的竞争效果。因此,为了验证用于预测未来加速器设施中的冷却性能的模拟,需要进行MC的测量。我们报告使用LIH吸收器和MUON在160至245 meV/c的动量范围内使用LIH吸收器和MUON进行的测量值。测得的RMS散射宽度比粒子数据组提出的近似公式所预测的宽度小约9%。将172、200和240 MEV/C的数据与Geant4(v9.6)默认散射模型进行了比较。这些测量结果表明,在事件Muon Momena的范围内,与最近的Geant4(v9.6)版本一致。
Multiple Coulomb Scattering (MCS) is a well known phenomenon occurring when charged particles traverse materials. Measurements of muons traversing low $Z$ materials made in the MuScat experiment showed that theoretical models and simulation codes, such as GEANT4 (v7.0), over-estimated the scattering. The Muon Ionization Cooling Experiment (MICE) measured the cooling of a muon beam traversing a liquid hydrogen or lithium hydride (LiH) energy absorber as part of a programme to develop muon accelerator facilities, such as a Neutrino Factory or a Muon Collider. The energy loss and MCS that occur in the absorber material are competing effects that alter the performance of the cooling channel. Therefore measurements of MCS are required in order to validate the simulations used to predict the cooling performance in future accelerator facilities. We report measurements made in the MICE apparatus of MCS using a LiH absorber and muons within the momentum range 160 to 245 MeV/c. The measured RMS scattering width is about 9% smaller than that predicted by the approximate formula proposed by the Particle Data Group. Data at 172, 200 and 240 MeV/c are compared to the GEANT4 (v9.6) default scattering model. These measurements show agreement with this more recent GEANT4 (v9.6) version over the range of incident muon momenta.