Fundamental Study of High Speed Data Acquisition System of Parallel Processing Type

1.我们已经检查了拓扑结构和功能的快速数据采集系统，如一个在正负电子对撞机实验所需的。我们发现US-NIM委员会提出的FASTBUS标准符合我们的要求.对TRISTAN实验的数据采集系统进行了详细的研究，发现数据传输速率应大于8 MB/s，事件发生率应通过触发逻辑降低到每秒几个.我们已经开发了硬件，根据上述第2项，使快速数据传输和触发：i）一个简化版本的FASTBUS段互连.ii）一个FASTBUS单段互连.iii）一个FASTBUS处理器接口为八位微机.iv）一个跟踪查找模块漂移室.v）一个第一级触发决策模块.我们已经设计，建造和测试上述电子模块，并发现它们的功能，我们预期.开发了FASTBUS模块的驱动和测试软件。它们包含在一个标准库中，可以在操作系统CP/M.5下轻松使用。在广岛大学举办了一次关于数据采集系统的讲习班。基于目前的研究，连同贡献者之间的讨论，它已得出结论，FASTBUS是最合适的用于处理和传输数字数据到在线计算机和另一种类型的数据总线是值得研究的一部分，其中涉及的模拟数据。

1. We have examined the topology and the functions for the fast data acquisition system such as the one needed in the electronpositron collider experiment. We found that the FASTBUS standard proposed by the US-NIM committee meets our requirement.2. The data acquisition system for TRISTAN experiments has been studied in detail and it has been found that the data tansfer rate should be greater than 8 MB/s and that the event rate should be reduced, by a trigger logic, to a few per second.3. We have developed hardwares, in accordance with the item 2 above, which enable fast data transfer and triggering :i) A simplified version of a FASTBUS Segment Interconnect.ii) A FASTBUS Simplex Segment Interconnect.iii) A FASTBUS Processor Interface for Eight Bit Microcomputers.iv) A Track Finding Module for Drift Chambers.v) A First-Level Trigger decision Module.We have designed , constructed and tested the electronics modules stated above and found that they function as we expected.4. The softwares have been developed for driving and testing the FASTBUS modules. They are included in a standard library which can be easily used under the operation system CP/M .5. A work-shop on data acquisition system has been held at Hiroshima University. Based on the present study, together with the discussions among the contributors, it has been concluded that the FASTBUS is most appropriately used to process and transfer the digital data to the online computer and that another type of data bus is worth examining for the part where the analog data is involved.