用于多举物理实验中的多重逻辑单元的研制

Design of a multiplicity logical unit applied for multi inclusive physical experiments

介绍了一个可广泛适用于数据获取系统中用作事件触发发生器的 NIM插件 ,它对具有众多相关参数的多举物理实验的实验数据进行有效逻辑处理及筛选。它根据预置的符合重数“N”的大小 ,输出一个 NIM信号“OUT”去触发数据获取系统和 ADC(或 TDC) ,对产生≥ N重符合的事件的实验信号进行数据转换 ,而忽略小于 N重符合的事件 ,从而得到符合事件的多重性及其分布。并使得后台数据获取系统的计算机能更容易和快速地对实验数据进行筛选和获取 ,去除掉大量无用数据 ,筛选掉大量低符合重数的事件 ,提高了实验的效率 ,节省了束流时间。

This paper briefly introduces a NIM module which can be widely used in the data acquisition system as event trigger generator, where the data of many relative parameters inclusive physical experiments are analyzed logically and selected beforehand. According to the inclusive multiplicity “N”, the module produces a NIM signal to trigger Data Acquisition System and ADC or TDC to convert the Events’ data if the events’ inclusive multiplicity is no less than “N”. Otherwise, if the inclusive multiplicity is less than “N”, then the Events will be ignored. Consequently, the inclusive multiplicity as well as its distribution of the inclusive events can be know, and the module makes the background computers of the data acquisition system to select and acquire the data more easily and faster. Therefore, lots of useless data and low inclusive events are excluded so as to save the expensive beam time and improve the experiment efficiency.