A software based post mortem system and its application in CSNS
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摘要: 对加速器运行过程中出现的故障进行准确分析，可有效提升加速器的可靠性及运行效率。而对于一些快速故障过程，必须依赖故障发生时刻存储的高度时间相关和高分辨率的数据，才能进行准确分析。设计了一种用于加速器的故障分析软件，可用于对快速故障进行可靠分析。在中国散裂中子源加速器中进行了应用，该系统非常准确地分析了此前无法定位的大部分束流丢失过程。该故障分析具有一定的通用性，可应用到其它加速器装置。Abstract: Post mortem system is one of the key analysis tools for the accelerators to achieve high reliability and high availability. The precise time correlated data with high resolution that archived during the failure process is the base for the post mortem system. A software based post mortem system is designed, developed and implemented. By using this software based post mortem system in the accelerator of the China Spallation Neutron Source, most of the fast beam loss processes whose root cause could not be accurately analyzed with normal tools are well determined. This software based post mortem system is a general purpose analysis tool for most of the accelerators.
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Key words:
- post mortem /
- distributed data acquisition /
- CSNS /
- EPICS /
- CSS
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图 2 数据获取应用程序功能模块关系框图
Figure 2. Diagram of data acquisition application software components
图 3 基于触发的数据存储实现方法框图
Figure 3. Diagram of data persistence realization based on external trigger
图 4 通过CSS data browser查询到的历史数据
Figure 4. Retrieved history data from database by CSS data browser tool
图 5 25 Hz重复频率连续两个周期的束流损失波形数据
Figure 5. Two consecutive periods beam loss waveforms with 25 Hz repetition rate
图 6 客户端与服务器时间偏差计算与PV发布实现框图
Figure 6. Diagram of time offset between client and NTP time server calculation and publishing
图 7 一次束损保存的数据和IOC时间偏差数据
Figure 7. Data and IOC time offset archived during a period of beam losts
图 8 连续三个重复周期的LEBTCT01与R1BLM01波形数据
Figure 8. Three consecutive cycle waveforms of LEBTCT01 and R1BLM01
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