分类: 物理学 >> 核物理学 提交时间: 2025-04-03
摘要: Cadmium Zinc Telluride (CdZnTe) has been extensively utilized in X-ray and gamma-ray detection because of its exceptional energy resolution and capability to operate at room temperature. This article presents the design of a CdZnTe (CZT) detector featuring a double-sided orthogonal microstrip electrode structure, which achieves both high energy resolution and high spatial resolution for nuclear radiation detection. Through simulation, the impact of electrode size on detector performance is examined within the range of a single electrode bar size of 150 µm (including width and gap). In addition, the energy spectrum response of the detector at room temperature was examined, revealing a full width at half maximum (FWHM) of 161.4 eV @ 6 keV and 512.6 eV @ 60 keV.
分类: 物理学 >> 核物理学 提交时间: 2025-02-07
摘要: A superconducting quantum interference device (SQUID), functioning as a nonlinear response device, typically requires the incorporation of a flux-locked loop (FLL) circuit to facilitate linear amplification of the current signal transmitted through a superconducting transition-edge sensor (TES) across a large dynamic range. This work presents a reasonable model of the SQUID-FLL readout system, based on a digital proportional-integral-differential (PID) flux negative feedback algorithm. This work investigates the effect of $V$-$\phi$ shape on the performance of digital FLL circuits. Such as the impact factors of bandwidth, design limits of slew rate of the system and the influence of the shapes of SQUID $V$-$\phi$ curve. Furthermore, the dynamic response of the system to X-ray pulse signals with rise time ranging from $4.4{\sim}281$ $\mathrm{{\mu}s}$ and amplitudes ranging from $6{\sim}8$ $\mathrm{\phi_0}$ was simulated. All the simulation results were found to be consistent with the existing mature theories, thereby validating the accuracy of the model. The results also provide a reliable modelling reference for the design of digital PID flux negative feedback and multiplexing SQUID readout electronic systems.