Upgrades of the Data Acquisition System for the KOTO Experiment

10th International Conference on Kaon Physics

Su, Stephanie^1 ; Ameel, Jon^1 ; Beaufore, Lucas^1 ; Beckford, Brian^1 ; Beechert, Jacqueline^1 ; Bogdan, Mircea^1 ; Bryant, Khalil^1 ; Campbell, Myron^1 ; Hutcheson, Melissa^1 ; Lee, Roman^1 ; McNeal, Noah^1 ; Micallef, Jessica^1 ; Robinson, Joshua^1 ; Rymph, Christopher^1 ; Schamis, Hanna^1 ; Sugiyama, Yasuyuki^1 ; Tajima, Yasuhisa^1 ; Taylor, Molly^1 ; Tecchio, Monica^1 ; Wah, Yau^1

Department of Physics, University of Michigan, Ann Arbor

MI

48109, United States^1

关键词: Beam power;    DAQ system;    Data acquisition system;    Hardware trigger;    Lossless data compression;    Wave forms;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/800/1/012042/pdf
DOI  :  10.1088/1742-6596/800/1/012042

来源: IOP

【 摘 要 】

The KOTO data acquisition system (DAQ) collects detector PMT waveform signals and saves digitized events to permanent storage using frontend ADC modules, two levels of hardware triggers, and a computing farm. The KOTO DAQ system ran stably in 2013 with 24 kW beam power. To maintain high DAQ livetime with increasing beam power, we implemented lossless data compression inside the ADC modules and developed a new L3 computing farm. The upgraded KOTO DAQ system was able to maintain livetime above 80% with 42 kW beam power during the 2015 and 2016 runs. To sustain high DAQ livetime for data taking with beam power of 50 kW and above, an upgrade of our hardware trigger is proposed.