A 61 cm long 13 cm square cross-section, electrical box used in the TASCC control to indicate that the MP tandem accelerator at Chalk River was in operation and to indicate the voltage on the high-voltage terminal. The tandem arrived at Chalk River in 1965 and was nominally a 10 MV (million volt) electrostatic accelerator but improvements over the years, including the use of a dust-free Pellatron charging system instead of the original charging belt, allowed operation up to 15.4 MV – the value at which the display from the decommissioned accelerator has been set to display. Operation of the accelerator ceased in 1997.
