Development and characterization of two-dimensional metallic magnetic calorimeter arrays for the high-resolution X-ray spectroscopy
Development and characterization of two-dimensional metallic magnetic calorimeter arrays for the high-resolution X-ray spectroscopy
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用于高分辨率 X 射线光谱的二维金属磁量热仪阵列的开发和表征
DOI：
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发表时间：
2017
期刊：
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通讯作者：
D. Hengstler
中科院分区：
文献类型：
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作者：
D. Hengstler
在本论文的框架内，开发、制造并表征了新型二维探测器阵列 maXs30。它针对高分辨率 X 射线进行了优化
能量范围高达 30 keV 的光谱由 8x8 个独立金属磁量热计组成。这些探测器结合了晶体光谱仪的良好能量分辨率和半导体探测器的大能量带宽，并通过产生的温度变化来测量每个吸收光子的能量。这种变化通过顺磁合金 Ag:Er 转换为磁化强度的变化，并由灵敏的 SQUID 磁力计读出。该检测器可安装在移动式干稀释冰箱的侧臂上，并且已为此阵列开发了新的 32 通道采集系统。 maxs30探测器的本征能量分辨率测量为7.9 eV（FWHM），对于能量为60 keV的X射线，其分辨率接近3000。完整的 maXs 系统在 GSI 的重离子存储环 ESR 的多次实验中成功进行了测试，其中研究了莱曼系列的 Xe53+ 和巴尔默系列的 U89+。
In the framework of this thesis the new two-dimensional detector array maXs30 was developed, fabricated and characterized. It is optimized for high-resolution X-ray
spectroscopy in the energy range up to 30 keV and consists of 8x8 individual metallic magnetic calorimeters. These detectors combine the good energy resolution of crystal spectrometers and the large energy bandwidth of semiconductor detectors and measure the energy of each absorbed photon by the resulting temperature change. This change is converted to a change of magnetization by the paramagnetic alloy Ag:Er, which is read out by sensitive SQUID magnetometers. The detector can be mounted on the side arm of a mobile dry dilution refrigerator and a new 32 channel acquisition system has been developed for this array. The intrinsic energy resolution of the maXs30 detector was measured to be 7.9 eV (FWHM) and a resolving power of almost 3000 was achieved for X-rays with an energy of 60 keV. The complete maXs system was successfully tested during several experiments at the heavy ion storage ring ESR at the GSI, where the Lyman series of Xe53+ and the Balmer series of U89+ were investigated.