A Predictive Control Algorithm for Time-Division-Multiplexed Readout of TES Microcalorimeters

Published

January 28, 2020

Author(s)

Malcolm S. Durkin, Galen C. O'Neil, William B. Doriese, Johnathon D. Gard, Gene C. Hilton, Jozsef Imrek, Nathan J. Ortiz, Carl D. Reintsema, Robert W. Stevens, Daniel S. Swetz, Joel N. Ullom

Abstract

Time division multiplexing (TDM) uses a digital flux-locked loop (DFLL) to linearize each first-stage SQUID amplifier. Presently, the dynamic range of our TDM systems is limited by the use of a proportional-integral controller to maintain the DFLL. In this paper, we use simulations to assess the improvements possible with a predictive control algorithm that anticipates rapid changes in transition-edge sensor current during the rising edge of an X-ray pulse. We calculate that the predictive control algorithm can improve our TDM architecture's dynamic range by 35%. This significant increase in multiplexing capabilities could be used to read out higher-energy X-rays, reduce readout noise, increase multiplexing factors, or reduce SQUID power output.

Citation

Journal of Low Temperature Physics

Volume

199

Pub Type

Journals

Download Paper

https://doi.org/10.1007/s10909-020-02342-4

Local Download

Keywords

transition edge sensor, SQUID, microcalorimeter, time division multiplexing, digital flux-locked loop, predictive control algorithm

Citation

Durkin, M. , O'Neil, G. , Doriese, W. , Gard, J. , Hilton, G. , Imrek, J. , Ortiz, N. , Reintsema, C. , Stevens, R. , Swetz, D. and Ullom, J. (2020), A Predictive Control Algorithm for Time-Division-Multiplexed Readout of TES Microcalorimeters, Journal of Low Temperature Physics, [online], https://doi.org/10.1007/s10909-020-02342-4 (Accessed April 26, 2024)