Performance of TES X-Ray Microcalorimeters Designed for 14.4-keV Solar Axion Search

Performance of TES X-Ray Microcalorimeters Designed for 14.4-keV Solar Axion Search
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专为 14.4 keV 太阳轴子搜索而设计的 TES X 射线微热量计的性能

DOI:
10.1007/s10909-023-02942-w
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发表时间:
2023
影响因子:
2
通讯作者:
Hara T.
Hara T.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Yagi Y.;Konno R.;Hayashi T.;Tanaka K.;Yamasaki N. Y.;Mitsuda K.;Sato R.;Saito M.;Homma T.;Nishida Y.;Mori S.;Iyomoto N.;Hara T.

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如果存在一个假设的基本粒子——轴子来解决强CP问题,那么太阳核中的AFe核可以通过M1跃迁发射出14.4 kev的单色轴子。过渡边缘传感器(TES) x射线微量热计可以非常有效地检测到这些轴子,如果它们再次被aFe吸收器转化为光子。我们设计并制造了一个专用的带铁吸收器的TES阵列,用于太阳轴子搜索。铁吸收体设置在TES旁边,与TES保持一定距离,以减小铁磁化对光谱性能的影响。一个金色的热转移带连接他们。从aFe源照射的样品像素检测到698个脉冲。与热模拟相反,我们认为脉冲包括在铁吸收器或金带中产生的事件,其部分取决于每种材料的吸收率。此外,沉积在铁吸收体上的光子如预期的那样通过带被检测到。所有事件的识别仍然需要完成。然而,我们首次在铁磁化条件下成功运行了具有独特设计的TES。
AFe nucleus in the solar core could emit a 14.4-keV monochromatic axion through the M1 transition if a hypothetical elementary particle, axion, exists to solve the strong CP problem. Transition edge sensor (TES) X-ray microcalorimeters can detect such axions very efficiently if they are again converted into photons by aFe absorber. We have designed and produced a dedicated TES array withFe absorbers for the solar axion search. The iron absorber is set next to the TES, keeping a certain distance to reduce the iron-magnetization effect on the spectroscopic performance. A gold thermal transfer strap connects them. A sample pixel irradiated from aFe source detected 698 pulses. In contrast to thermal simulations, we consider that the pulses include either events produced in an iron absorber or gold strap at a fraction dependent on the absorption rate of each material. Furthermore, photons deposited on the iron absorber are detected through the strap as intended. The identification of all events still needs to be completed. However, we successfully operated the TES with the unique design under iron magnetization for the first time.
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