Simulation of TES X-ray Microcalorimeters Designed for 14.4 keV Solar Axion Search
Simulation of TES X-ray Microcalorimeters Designed for 14.4 keV Solar Axion Search
复制标题
为 14.4 keV 太阳轴子搜索而设计的 TES X 射线微量热计的模拟
DOI：
10.1007/s10909-022-02902-w
复制
发表时间：
2022
影响因子：
2
通讯作者：
Homma T.
中科院分区：
文献类型：
--
作者：
Mori Shohei;Nishida Y.;Iyomoto N.;Yagi Y.;Konno R.;Hayashi T.;Tanaka K.;Yamasaki N. Y.;Mitsuda K.;Sato R.;Saito M.;Homma T.
这项研究试图开发使用过渡边缘传感器(TES)微量热计来探测太阳轴子的方法。由于由铁-57(57Fe)组成的轴离子吸收器是在薄膜上电镀而不是直接电镀到TES本身上(因此，吸收器通过金色热带与TES热连接)，因此沉积到吸收器中的一些热在被TES检测之前通过膜逃逸到热浴中。如果热损失取决于轴子在吸收体内的相互作用位置，位置依赖可能会降低能量分辨率。因此，本研究试图利用COMSOL多物理软件包(使用有限元方法)来评估轴子入射位置对热损失和脉冲形状的依赖关系。此外，当能量直接沉积在金热带内时，也同样评估了热损失和脉冲形状。
This study attempted to develop detection methods for solar axions using transition-edge-sensor (TES) microcalorimeters. Since the axion absorber comprised of iron-57 (57Fe) is electroplated upon the membrane instead of directly onto the TES itself (with the absorber hence thermally connected to the TES via a gold thermal strap), some of the heat deposited into the absorber consequently escapes into the heat bath through the membrane before being detected by the TES. If the heat-loss depends upon the axion interaction position within the absorber, position dependence may degrade the energy resolution. Therefore, this study endeavored to evaluate the dependence of heat-loss and pulse shape on axion incident position with the COMSOL Multiphysics software package (using a finite element method). In addition, heat-loss and pulse shape were likewise evaluated when the energy was deposited directly within the gold thermal strap.