In 2019, the ATLAS experiment at CERN is planning an upgrade
in order to cope with the higher luminosity requirements. In this
upgrade, the installation of the new muon chambers for the end-cap
muon system will be carried out. Muon track reconstruction performance
can be improved, and fake triggers can be reduced. It is also
necessary to develop readout system of trigger data for the Level-1
end-cap muon trigger.
We have decided to develop software-based data acquisition system.
Therefore, we have implemented SiTCP technology, which connects a FPGA
with the network, on FPGA of new trigger processor boards.
Due to this implementation, this new DAQ system can take advantage of
the latest developments in computing industry. This new readout system
architecture is based on multi-process software, and can assemble
events at a rate of 100 kHz. For data collection, the 10 Gbit Ethernet
network switch is used. Moreover, we have optimized these processes to
send data to the following system without any error. Therefore, the
built events can be sent with an average throughput of ~ 211 Mbps.
Our newly developed readout system is very generic and it is flexible
for modifications, extensions and easy to debug. In this talk, we will
present the details of the new software-based DAQ system and report
the development status for ATLAS Run-3.