Speaker
Description
Needs for the high-throughput, trigger-less, and event-lossless data acquisition and processing system is becoming increasingly and commonly not only in high-energy but also in the low-energy nuclear-physics experiments in various accelerator facilities since the beam intensity (or luminosity) becomes higher and the granularity of the detectors becomes larger. This is a serious and common issue among many experimental groups in Japan. SPADI Alliance is initiated based on such demands to develop a common new-generation data acquisition and processing system. A new streaming-readout data acquisition and processing system with scalability has been developed by the SPADI Alliance. The new system has been employed in physics experiments performed using Grand Raiden magnetic spectrometer at RCNP (Osaka) and in detector development at J-PARC (Ibaraki). The new system can handled the total event rate of 200 kcps at RCNP, which is 20 - 40 times larger than the traditional system. The data throughput of 10 Gbps has been achieved at J-PARC. The whole system including the frontend electronics (TDC), the readout and processing software, and the analysis software is now being packaged for publication. In this paper, the overview of the new system is introduced and its performance is discussed.
