arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1206.0679physics.ins-dethep-ex
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基于FPGA的低资源时间数字转换器

Low resource FPGA-based Time to Digital Converter

A. Balla, M. Beretta, P. Ciambrone, M. Gatta, F. Gonnella, L. Iafolla, M. Mascolo, R. Messi, D. Moricciani, D. Riondino

摘要:

时间数字转换器(TDC)是粒子物理实验中非常常用的器件。可以采用许多“现成的”TDC,但是定制数据采集(DAQ)系统的必要性使得在现场可编程门阵列(FPGA)上实现的TDC是理想的。到目前为止,开发的大多数架构都是基于精度低至10 ps的抽头延迟线,这需要管理高FPGA资源使用率和非线性问题。通常这种精度是不必要的;在这种情况下,具有低资源占用的TDC架构是优选的,允许在同一设备上实现数据处理系统和其他实用程序。为了重建KLOE-2(KLOng实验2)中高能标记器(HET)标记的伽马-伽马物理事件,我们需要测量电子和正电子从KLOE-2相互作用点(IP)到我们的标记站(相距11 m)的飞行时间(TOF)。所需的分辨率必须优于聚束间距(2.7 ns)。在Xilinx Virtex-5 FPGA上实现了32通道TDC,精度为255 ps,非线性度低,同时实现了嵌入式数据采集系统和KLOE-2在线FARM接口。

英文摘要:

Time to Digital Converters (TDCs) are very common devices in particles physics experiments. A lot of "off-the-shelf" TDCs can be employed but the necessity of a custom DAta acQuisition (DAQ) system makes the TDCs implemented on the Field-Programmable Gate Arrays (FPGAs) desirable. Most of the architectures developed so far are based on the tapped delay lines with precision down to 10 ps, obtained with high FPGA resources usage and non-linearity issues to be managed. Often such precision is not necessary; in this case TDC architectures with low resources occupancy are preferable allowing the implementation of data processing systems and of other utilities on the same device. In order to reconstruct gamma-gamma physics events tagged with High Energy Tagger (HET) in the KLOE-2 (K LOng Experiment 2), we need to measure the Time Of Flight (TOF) of the electrons and positrons from the KLOE-2 Interaction Point (IP) to our tagging stations (11 m apart). The required resolution must be better than the bunch spacing (2.7 ns). We have developed and implemented on a Xilinx Virtex-5 FPGA a 32 channel TDC with a precision of 255 ps and low non-linearity effects along with an embedded data acquisition systems and the interface to the online FARM of KLOE-2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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