Monte Carlo Simulation of Massive Absorbers for Cryogenic Calorimeters
Monte Carlo Simulation of Massive Absorbers for Cryogenic Calorimeters
复制标题
低温量热计大型吸收器的蒙特卡罗模拟
DOI：
10.1007/s10909-012-0480-3
复制
发表时间：
2012
影响因子：
2
通讯作者：
E. Figueroa
中科院分区：
文献类型：
--
作者：
D. Brandt;M. Asai;B. Cabrera;E. Silva;M. Kelsey;R. Resch;D. Wright;P. Brink;K. McArthy;S. Leman;E. Figueroa
具有宏观吸收体的低温量热计在暗物质直接探测和稀有事件搜索实验中的应用越来越受到人们的关注。吸收体质量超过几克的量热计中的能量传输物理学由于吸收体晶体的各向异性性质以及随着声子衰减到逐渐较低的能量而变化的平均自由程而变得复杂。本文提出了一个能模拟低温晶体中各向异性声子输运的蒙特卡罗模型。我们已经启动了验证过程，并讨论了我们的模拟和文献中报道的实验结果之间的协议水平，专注于热脉冲传播锗。模拟框架是使用Geant 4，最初开发的高能物理蒙特卡罗模拟工具包。Geant 4还被用于核物理和加速器物理，以及医学和空间科学的应用。我们相信，我们目前的工作可能会为材料科学和凝聚态物理学的应用开辟新的途径。
There is a growing interest in cryogenic calorimeters with macroscopic absorbers for applications such as dark matter direct detection and rare event search experiments. The physics of energy transport in calorimeters with absorber masses exceeding several grams is made complex by the anisotropic nature of the absorber crystals as well as the changing mean free paths as phonons decay to progressively lower energies. We present a Monte Carlo model capable of simulating anisotropic phonon transport in cryogenic crystals. We have initiated the validation process and discuss the level of agreement between our simulation and experimental results reported in the literature, focusing on heat pulse propagation in germanium. The simulation framework is implemented using Geant4, a toolkit originally developed for high-energy physics Monte Carlo simulations. Geant4 has also been used for nuclear and accelerator physics, and applications in medical and space sciences. We believe that our current work may open up new avenues for applications in material science and condensed matter physics.