论文标题
在FDM读数下X射线光谱的TES微含量计的敏感性研究
Susceptibility study of TES micro-calorimeters for X-ray spectroscopy under FDM readout
论文作者
论文摘要
我们提出了TES X射线微钙化器对频域多路复用（FDM）读数下的敏感性的表征。在FDM方案中，读取链中的每个TE都串联使用LC带通滤波器，并且在MHz范围内具有独立载体的AC偏置。使用TES阵列，在VTT Finland生产的SRON制造的冷读数电路和温暖的电子设备，我们表征了探测器对偏置电压，浴温度和磁场的敏感性。我们将结果与雅典娜X-IFU仪器的要求进行比较，显示了测得的敏感性的依从性。我们特别发现，由于TES设计和AC读数，FDM对磁场本质上不敏感。
We present a characterization of the sensitivity of TES X-ray micro-calorimeters to environmental conditions under frequency-domain multiplexing (FDM) readout. In the FDM scheme, each TES in a readout chain is in series with a LC band-pass filter and AC biased with an independent carrier at MHz range. Using TES arrays, cold readout circuitry and warm electronics fabricated at SRON and SQUIDs produced at VTT Finland, we characterize the sensitivity of the detectors to bias voltage, bath temperature and magnetic field. We compare our results with the requirements for the Athena X-IFU instrument, showing the compliance of the measured sensitivities. We find in particular that FDM is intrinsically insensitive to the magnetic field because of TES design and AC readout.
