The Beam Current Monitor (BCM) is designed for stable, low noise, non-intercepting beam current measurements. It consists of an Unser monitor, two rf cavities, the electronics and a data acquisition system. The cavities and the Unser monitor are enclosed in a box to improve magnetic shielding and temperature stabilization. The box is located 25 m upstream of the target. You can recognize it as a grey object on the stands, about 2 m downstream from where the beam enters the hall.
The DC 200 down-converters and the Unser front end electronics are located in Hall A. The temperature controller, the Unser back end electronics and its calibration current source, cavity's RF unit (housing the RMS-to-DC converter board) and all multi-meters, VME crate and computers are located in Hall A control room.