PImMS, a fast event-triggered monolithic pixel detector with storage of multiple timestamps
PImMS, a fast event-triggered monolithic pixel detector with storage of multiple timestamps
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DOI：
10.1088/1748-0221/7/08/c08001
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发表时间：
2012-08-01
影响因子：
1.3
通讯作者：
Yuen, W. H.
中科院分区：
文献类型：
--
作者：
John, J. J.;Brouard, M.;Yuen, W. H.
PImMS（Pixel Imaging Mass Spectrometry）是一种新型的高速单片CMOS成像传感器，可满足质谱分析的要求，也适用于其他暗场应用。在飞行时间质谱的应用中，传感器允许离子到达时间分布与2D成像相结合，提供有关所研究离子的初始位置或速度的额外信息。PImMS 1是该系列中的第一代传感器，包括间距为70 μ m × 70 μ m的72 × 72像素阵列。当事件发生超过可调阈值时，像素独立地记录数字时间戳。每个像素包含4个存储器，以25 ns的分辨率记录时间戳。该传感器是在INMAPS 0.18 μ m工艺中设计和制造的。这允许在每个像素内包含大量的电路（超过600个晶体管），同时保持良好的检测效率。我们提出了一个概述的像素和传感器架构，解释其功能和目前的测试结果，范围从模拟前端的像素的特性，验证其数字功能，一些第一图像上捕获的质谱仪。最后，我们概述了即将到来的第二代PImMS传感器。
PImMS, or Pixel Imaging Mass Spectrometry, is a novel high-speed monolithic CMOS imaging sensor tailored to mass spectrometry requirements, also suitable for other dark-field applications. In its application to time-of-flight mass spectrometry, the sensor permits ion arrival time distributions to be combined with 2D imaging, providing additional information about the initial position or velocity of ions under study. PImMS1, the first generation sensor in this family, comprises an array of 72 by 72 pixels on a 70 mu m by 70 mu m pitch. Pixels independently record digital timestamps when events occur over an adjustable threshold. Each pixel contains 4 memories to record timestamps at a resolution of 25 ns. The sensor was designed and manufactured in the INMAPS 0.18 mu m process. This allows the inclusion of significant amounts of circuitry (over 600 transistors) within each pixel while maintaining good detection efficiency. We present an overview of the pixel and sensor architecture, explain its functioning and present test results, ranging from characterisation of the analogue front end of the pixel, to verification of its digital functions, to some first images captured on mass spectrometers. We conclude with an overview of the upcoming second generation of PImMS sensors.