Prof. Liliang Ying Profile

Prof. Liliang Ying

at SIMIT CAS

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Proceedings Article | 31 August 2022 Paper

Development of sensor SQUID and Zappe interferometer switch for HUBS

Yining Zheng, Yingyu Chen, Yuanxing Xu, Huanqian Zhang, Lihong Tang, Liliang Ying, Hangxing Xie, Bo Gao, Zhen Wang

Proceedings Volume 12181, 121816I (2022) https://doi.org/10.1117/12.2628454

KEYWORDS: Switches, Sensors, Time division multiplexing, Multiplexing, X-rays, X-ray telescopes, Superconductors, Electronics, Spectroscopy

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Hot Universe Baryon Surveyor (HUBS) is a proposed Chinese space mission to search for the so-called “missing baryons”. HUBS will focus on soft X-ray detection. The central part of the HUBS telescope is a soft X-ray spectrometer that uses a large transition-edge sensors array to detect the photon emission from a warm-hot intergalactic medium. The detector array comprises more than 3600 pixels. To read such a large number of pixels, a multiplexed readout technique is obligatory. We aim to develop a time-division multiplexed (TDM) readout system for HUBS. We choose TDM because it is the most mature and common one among various multiplexed readout techniques. We started by developing a proto-type TDM system that uses a single-stage SQUID readout. The basic multiplexing unit is composed of a SQUID series array (SSA) in parallel with a SQUID-based superconducting/normal conducting switch (SN switch). The SSA is composed of 16 individual SQUID cell that adopts a 1st order serial gradiometer design. The switch is also made of SQUID cells connected in series. The SQUID cell for a switch can comprise two Josephson junctions (JJs) like a usual DC-SQUID. It can also take the form of a Zappe interferometer that consists of four JJs. We will present the design and the simulation results of the sensor SQUID array and the SN switches.

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