This panel, originally located in the Control Room of the Chalk River Tandem and Super-Conducting Cyclotron (TASSC), indicated the path of the accelerated beam starting from one of the two ion sources all the way through the tandem and/or the cyclotron to the experimental set-up. The 40 cm by 40 cm, photo-etched, aluminum panel used LED lights to indicate which of the beam line magnets were energized as well as in which areas radiation hazards existed. The right-hand photo shows the back of the panel and the electronic circuits which received the signals from the beamline and radiation monitors and turned on the LED indicators. The TASSC accelerator was shut down in 1997 and dismantled.