The data acquisition system of the KOTO experiment and RPT upgrade

2016 IEEE-NPSS Real Time Conference (RT) Pub Date : 2016-06-06 DOI:10.1109/RTC.2016.7543153

S. Su, J. Ameel, J. Beechert, M. Bogdan, M. Campbell, C. Gee, M. Huff, J. Micallef, Joshua Robinson, Christopher Rymph, H. Schamis, Y. Sugiyama, Y. Tajima, M. Tecchio, N. Whallon, Y. Wah, Jia Xu

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引用次数: 1

Abstract

The KOTO experiment at J-PARC in Tokai, Ibaraki, Japan, aims to observe rare neutral kaon decay mode KL → π0νν. Followed by the first KOTO physics run in May 2013 with 24 kW beam power, we upgraded the KOTO data acquisition system in 2015 to accommodate efficient and reliable data collection with higher beam intensities. Lossless data compression inside the ADC modules was implemented to reduced the size of data packets. The lossless data compression enhanced the data collection rate by a factor of three. We designed a new software trigger, which consists of 47 computer nodes. It uses Infiniband hardware with MPI protocol to establish mesh network within the computer cluster and parallel data processing. The upgrades of the KOTO data acquisition system were commissioned in 2015 and used to successfully collect data with beam intensity up to 42 kW. In preparation for increasing beam intensities in 2016 runs, we are developing the hardware trigger upgrades using the RCE Platform Technology (RPT).

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KOTO实验数据采集系统及RPT升级

在日本茨城县东海的J-PARC进行KOTO实验，目的是观察罕见的中性介子衰变模式KL→π νν。继2013年5月首次KOTO物理运行后，我们在2015年升级了KOTO数据采集系统，以适应更高光束强度的高效可靠数据采集。在ADC模块内部实现了无损数据压缩，减少了数据包的大小。无损数据压缩使数据采集速率提高了三倍。设计了一种由47个计算机节点组成的新型软件触发器。它采用Infiniband硬件和MPI协议，在计算机集群内建立网状网络，并行处理数据。KOTO数据采集系统的升级于2015年投入使用，并成功收集了光束强度高达42千瓦的数据。为了在2016年增加波束强度，我们正在使用RCE平台技术(RPT)开发硬件触发器升级。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE-NPSS Real Time Conference (RT)

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