Remote Control Station in High-Energy Physics Experiment

世界上可用于能源前沿实验的大型加速器装置由于其规模极大，必然受到数量的限制，而由多个研究所支持的合作实验成为高能物理实验的常态。在这些实验中，成功的关键是连续监测探测器性能和快速分析采样数据以反馈数据采集。从长远来看，负责维护和操作探测器的大学团体正在寻找通过两个实验室之间的专用数据传输线连接的远程控制站来控制实验的可能性。在名古屋的名古屋大学高能物理实验室（NUHEPL）和筑波的国家高能物理实验室（KEK）之间建造了一个远程控制站，通过富士通公司提供的9600 bps的专用数据传输线路，远程监控系统可以实现远程监控。 ...更多信息 在名古屋的实验室是由模拟TRISTAN/黄玉探测器主数据采集系统的Micro VAX计算机控制的DECNET组成的。本文介绍了遥测站的结构、黄玉探测器、在线数据采集、监测和触发系统，以及遥测站的技术要求。经过两年的性能试验，在1987年至1989年的黄玉运行期间，NUHEPL成功地再现和监测了几乎所有的探测器信息。并且除了由于在监视在线数据获取中的有限的数据传输速度而在远程站处的稍微迟钝的响应之外，没有发现严重的问题。在实验中，可视图文监控方法被发现不是很有用，因为它不能灵活地响应各种需求。还用黄玉端盖探测器测试了远程站对探测器的控制，发现非常有效。但是，探测器的远程控制需要一条专用的传输线，以避免意外的入侵者，为了安全起见，探测器元件中需要一些奇特的故障安全机制，并需要多条传输线连接，以避免意外的故障。总之，根据本系统的适当构造，远程站被发现在大规模高能物理实验中是非常有用的。在监测大量探测器系统的详细性能方面，特别是在黄玉实验中，没有严重的技术问题。根据目前的性能测试，我们对未来远程工作站的几个关键问题进行了评述。少

Due to their extremely large scale,the big accelerator facilities available for energy-frontier experiments in the world is necessarily limited to a small number,and the cooperative experiments supported by a large number of institutes become the normal form of high-energy physics experiment. In these experiment,a key to succsess is continuous monitoring of the detector performance and quick analysis of sampled data to feedback data acquisition. In the long term run,university groups in charge of the maintenance and operation of detectors are looking for possibilities to control experiment from their home laboratories by the remote control station connected by a dedicated data transmission line between the two laboratories.A remote station was constructed between High-Energy Physics Laboratory in Nagoya University at Nagoya (NUHEPL) and National Laboratory for High Energy Physics (KEK) at Tsukuba,through a dedicated data transmission line of 9600bps provided by Fujitsu Co. The remote s … More tation at Nagoya was consisted of DECNET controled by Micro VAX computer emulating the main deta acquision system in TRISTAN/TOPAZ detector. In this report,we describe the structure of remote station,a brief description of TOPAZ detector,on-line data acquisition,monitoring and trigger systems,and then required specifications for the remote-station.After 2-years tests on the performance of present system,it became clear that almost all of the detector informations were successfully reproduced and monitored at NUHEPL during the TOPAZ runs in 1987 to 89,and no serious problems was found except for slightly dull response at the remote station due to the limited data-transfar speed in monitoring on-line data acquisitions. The Videotex method for monitoring was found not so useful in the experiment scince it was not flexible to respond a varity of needs. The control of detectors by the remote station was also tested with the TOPAZ endcap detectors,and was found to be very effective. It should be stressed,however,the remote control of detector needs a dedicated transmission line to avoid unexpected intruders,nd for safety,some fancy fail-safe mechanisms in detector elements and more than one connection of transmission lines are required to avoid unexpected failures.In conclusion,the remote station properly constructed as the present system was found to be very useful in the large scaled highenergy physics experiment,and there was no serious technical problem in monitoring detailed performances of great many detector system,particularly in TOPAZ experiment. Based upon the present performance tests,we reviewed several aspects for the keys to the future remote-stations. Less