A Spread-Spectrum SQUID Multiplexer

被引:7
作者
Irwin, K. D. [1 ,2 ]
Chaudhuri, S. [1 ]
Cho, H. -M. [2 ]
Dawson, C. [1 ]
Kuenstner, S. [1 ]
Li, D. [2 ]
Titus, C. J. [1 ]
Young, B. A. [1 ]
机构
[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[2] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
关键词
TES; SQUID; Microwave SQUID; Spread spectrum; Multiplexing; ARRAYS; RESOLUTION;
D O I
10.1007/s10909-018-1987-z
中图分类号
O59 [应用物理学];
学科分类号
摘要
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.
引用
收藏
页码:476 / 484
页数:9
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