A new DAQ collaboration in Japan

Various data acquisition (DAQ) systems, consisting of frontend electronics, fast transfer protocols and interfaces, triggering system, acquisition and analysis softwares, and computing infrastructure have been individually developed adapting for  many types of detector setups aiming at a variety of physics cases in particle and nuclear physics. To maintain such DAQ systems, each facility or experimental group should prepare each human resource and training program, which is becoming difficult. Production of trigger signals is another practical issue due to the complexity of detector setup, and to the high event rate thanks to the high intensity beams provided. 

These are common issues for most of the nuclear experimentalists and facilities including RCNP, J-PARC, RIBF and maybe experimentalists in other fields or in other facilities.  In order to solve these issues, we form a development community named SPADI Alliance and are developing the streaming readout data acquisition system as a solution for the problems. Our goal is to make a standard package of the streaming DAQ system, which can be used in small, medium and large scale experiments including offline detector developments and to maintain the platform where we can continuously develop and maintain the DAQ system for the future.

In this paper,  we summarize briefly the present status of DAQ systems in Japan, introduce the new collaboration SPADI Alliance and its activities and then discuss the roadmap of the development and possible collaboration.