论文标题
X射线整体场单元的频域多路复用的发展进展
Progress in the development of frequency domain multiplexing for the X-ray Integral Field Unit on board the Athena mission
论文作者
论文摘要
频域多路复用（FDM）是Athena任务上X射线整体场单元（X-IFU）的基线读数系统。在FDM方案下，苔丝与被动LC过滤器耦合，并与MHz频率下的交流电流（AC偏置）偏置。使用VTT提供的高质量因子LC过滤器和在SRON和低噪声两阶段鱿鱼放大器上开发的室温电子产品，我们最近在MO/AU TES热量表的FDM读数和AU/BI吸收器的FDM读数中表现出了良好的性能。我们已经获得了单个像素AC偏置（$ΔE= $ 1.8 eV）和9个像素多路复用（$ΔE= $ 2.6 eV）模式的示范模型（DM）的性能。我们还证明了14像素复用，平均能量分辨率为3.3 eV，这受到实验室设置中与FDM读数相关的非基本问题的限制。
Frequency domain multiplexing (FDM) is the baseline readout system for the X-ray Integral Field Unit (X-IFU) on board the Athena mission. Under the FDM scheme, TESs are coupled to a passive LC filter and biased with alternating current (AC bias) at MHz frequencies. Using high-quality factor LC filters and room temperature electronics developed at SRON and low-noise two-stage SQUID amplifiers provided by VTT, we have recently demonstrated good performance with the FDM readout of Mo/Au TES calorimeters with Au/Bi absorbers. We have achieved a performance requested for the demonstration model (DM) with the single pixel AC bias ($ΔE=$1.8 eV) and 9 pixel multiplexing ($ΔE=$2.6 eV) modes. We have also demonstrated 14-pixel multiplexing with an average energy resolution of 3.3 eV, which is limited by non-fundamental issues related to FDM readout in our lab setup.
