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Improved Data Acquisition Methods for Uninterrupted Signal Monitoring and Ultra-Fast Plasma Diagnostics in LHD

机译：改进的数据采集方法，用于LHD中的不间断信号监测和超快速等离子体诊断

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To deal with endless data streams acquired in LHD steady-state experiments, the LHD data acquisition system was designed with a simple concept that divides a long pulse into a consecutive series of 10-s “subshots”. Latest digitizers applying high-speed PCI-Express technology, however, output nonstop gigabyte per second data streams whose subshot intervals would be extremely long if 10-s rule was applied. These digitizers need shorter subshot intervals, less than 10-s long. In contrast, steady-state fusion plants need uninterrupted monitoring of the environment and device soundness. They adopt longer subshot lengths of either 10 min or 1 day. To cope with both uninterrupted monitoring and ultra-fast diagnostics, the ability to vary the subshot length according to the type of operation is required. In this study, a design modification that enables variable subshot lengths was implemented and its practical effectiveness in LHD was verified.
机译：为了处理在LHD稳态实验中采集到的无尽数据流，LHD数据采集系统的设计理念很简单，即将长脉冲分成连续的10 s“子快照”系列。但是，最新的采用高速PCI-Express技术的数字化仪每秒输出不间断千兆字节数据流，如果应用10 s规则，其子拍摄间隔将非常长。这些数字化仪需要更短的子拍摄间隔，少于10秒。相比之下，稳态聚变工厂需要对环境和设备健全性进行不间断的监控。他们采用更长的子镜头长度，即10分钟或1天。为了应付不间断的监视和超快速诊断，需要具有根据操作类型改变子弹长度的能力。在这项研究中，实现了一种设计修改，该修改允许可变子弹长度，并验证了其在LHD中的实际有效性。

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