Heather Russell Presentation, November 21, 2021

Did you know that 99.99% of collision events at the LHC are discarded? During active data-taking, over one billion protons will collide inside the ATLAS detector each second. However, physicists can't even come close to saving all the data from these collisions. Which collisions are saved and which are rejected is decided by the ATLAS "trigger" system.

In this presentation, Dr. Heather Russell discuss how physicists make the difficult decision of which collisions they record, and the hardware and software that enable this incredibly fast decision-making.