The NA62 GigaTracker
The NA62 GigaTracker
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NA62 千兆追踪器
DOI：
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发表时间：
2015
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通讯作者：
M. Perrin
中科院分区：
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作者：
M. Perrin
GigaTracker是一种混合硅像素探测器，用于NA 62实验，旨在测量CERN SPS上超稀有K+→π+νν <$的分支分数。该探测器必须跟踪光束中的粒子，其通量达到1.3 MHz/mm 2，并提供具有200 ps RMS分辨率的单次命中定时，每个站点的总材料预算小于0.5%X0。该跟踪器由三个60.8 mm×27 mm的工作站组成，工作站安装在真空（10 - 6 mbar）中，并通过在几百微米厚的硅板内蚀刻的微通道中循环的液体C6 F14冷却。每个工作站由一个200 μm厚的硅传感器组成，由2×5个定制的100 μm厚的ASIC（称为TDCPix）读出。每个芯片包含40×45个300 μm×300 μm的异步像素，并配有100 ps bin时间-数字转换器。为了科普高速率，TDCPix配备了四个3.2 Gb/s串行器发送数据。我们将描述探测器以及2014年和2015年NA 62运行的结果。
The GigaTracker is a hybrid silicon pixel detector built for the NA62 experiment aiming at measuring the branching fraction of the ultra-rare kaon decay K+→π+νν¯ at the CERN SPS. The detector has to track particles in a beam with a flux reaching 1.3 MHz/mm2 and provide single-hit timing with 200 ps RMS resolution for a total material budget of less than 0.5% X0 per station. The tracker comprises three 60.8 mm×27 mm stations installed in vacuum (∼10−6mbar) and cooled with liquid C6F14 circulating through micro-channels etched inside a few hundred micron thick silicon plates. Each station is composed of a 200 μm thick silicon sensor read out by 2×5 custom 100 μm thick ASICs, called TDCPix. Each chip contains 40×45 asynchronous pixels, 300 μm×300 μm each and is instrumented with 100 ps bin time-to-digital converters. In order to cope with the high rate, the TDCPix is equipped with four 3.2 Gb/s serialisers sending out the data. We will describe the detector and the results from the 2014 and 2015 NA62 runs.