用于电子显微镜的 100 kfps 高动态范围像素检测器读出 ASIC EMPIX2 的设计与评估

IF 1.3 4区工程技术 Q3 INSTRUMENTS & INSTRUMENTATION

Journal of Instrumentation Pub Date : 2023-12-01 DOI:10.1088/1748-0221/18/12/C12007

T. Wei, H. Yang, Z. Deng, T. Xue, X. Wang

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引用次数: 0

摘要

EMPIX2 是一种用于电子显微镜的新型混合像素检测器读出 ASIC，最大帧频为 100 kfps，动态范围非常大（5 × 105:1）。它具有 128 × 128 平方像素，间距为 150 μm。自适应增益开关和电荷泵技术的应用提高了动态范围。像素可在两种模式下工作：脉冲模式和连续模式。在脉冲模式下，超快增益开关可实现对脉冲电子源的快速响应，因此非常适合 UEM 应用。在连续模式下，功耗和动态范围经过优化，适用于 STEM 应用。读出是基于帧的，数字图像数据由 64 对 LVDS 驱动器以 DDR 模式输出，时钟频率为 400 MHz。为传输和处理图像数据，开发了一个专用数据采集系统。使用片上校准源对读出芯片进行了初步验证。

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Design and evaluation of EMPIX2, a 100 kfps, high dynamic range pixel detector readout ASIC for electron microscopy

EMPIX2 is a novel hybrid pixel detector readout ASIC for electron microscopy with a maximum frame rate of 100 kfps and a very large dynamic range (5 × 105:1). It features 128 × 128 square pixels at a pitch of 150 μm. Adaptive gain switching and charge pump technology are applied to enhance the dynamic range. The pixels can operate in two modes: pulse mode and continuous mode. In pulse mode, ultra-fast gain switching enables a rapid response to pulsed electron sources, making it highly suitable for UEM applications. In continuous mode, the power consumption and dynamic range are optimized for STEM applications. The readout is frame-based, and digital image data is output by 64 pairs of LVDS drivers working in DDR mode at a clock frequency of 400 MHz. A dedicated data acquisition system was developed for the transmission and processing of the image data. Preliminary verification of the readout chip was performed using an on-chip calibration source.

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来源期刊

Journal of Instrumentation 工程技术-仪器仪表

CiteScore

2.40

自引率

15.40%

发文量

827

审稿时长

7.5 months

期刊介绍： Journal of Instrumentation (JINST) covers major areas related to concepts and instrumentation in detector physics, accelerator science and associated experimental methods and techniques, theory, modelling and simulations. The main subject areas include. -Accelerators: concepts, modelling, simulations and sources- Instrumentation and hardware for accelerators: particles, synchrotron radiation, neutrons- Detector physics: concepts, processes, methods, modelling and simulations- Detectors, apparatus and methods for particle, astroparticle, nuclear, atomic, and molecular physics- Instrumentation and methods for plasma research- Methods and apparatus for astronomy and astrophysics- Detectors, methods and apparatus for biomedical applications, life sciences and material research- Instrumentation and techniques for medical imaging, diagnostics and therapy- Instrumentation and techniques for dosimetry, monitoring and radiation damage- Detectors, instrumentation and methods for non-destructive tests (NDT)- Detector readout concepts, electronics and data acquisition methods- Algorithms, software and data reduction methods- Materials and associated technologies, etc.- Engineering and technical issues. JINST also includes a section dedicated to technical reports and instrumentation theses.