A Spread-Spectrum SQUID Multiplexer
A Spread-Spectrum SQUID Multiplexer
复制标题
扩频 SQUID 多路复用器
DOI：
10.1007/s10909-018-1987-z
复制
发表时间：
2018
影响因子：
2
通讯作者：
Betty A. Young
中科院分区：
文献类型：
--
作者：
K. Irwin;K. Irwin;S. Chaudhuri;Hsiao;C. Dawson;S. Kuenstner;Dale Li;C. Titus;Betty A. Young
过渡边缘传感器（TES）是一种成熟的高分辨率x射线光谱仪技术，它比色散光谱仪（如光栅和晶体光谱仪）提供更高的效率。随着更大的阵列的发展，以兆赫频率工作的时分多路复用方案正在被使用千兆赫频率分频多路复用的微波SQUID多路复用器所取代。然而，微波squid可实现的多路复用因子受到x射线脉冲前缘的高转换率的限制。在本文中，我们提出了一种新的高速率TES x射线量热计的多路复用方案：扩频SQUID多路复用器，它有可能实现更高的多路复用因子，特别是在低光子到达率的应用中。
The transition-edge sensor (TES) is a mature, high-resolution x-ray spectrometer technology that provides a much higher efficiency than dispersive spectrometers such as gratings and crystal spectrometers. As larger arrays are developed, time-division multiplexing schemes operating at MHz frequencies are being replaced by microwave SQUID multiplexers using frequency-division multiplexing at GHz frequencies. However, the multiplexing factor achievable with microwave SQUIDs is limited by the high slew rate on the leading edge of x-ray pulses. In this paper, we propose a new multiplexing scheme for high-slew-rate TES x-ray calorimeters: the spread-spectrum SQUID multiplexer, which has the potential to enable higher multiplexing factors, especially in applications with lower photon-arrival rates.