ENVIRONMENTAL RADIATION TELEMETRY SYSTEM
H.S. Dakin, Lloyd D. Stephens · eScholarship (California Digital Library) · 1967
Centralized monitoring and recording of accelerator-produced radiation fields at points within the Lawrence Radiation Laboratory 1 s Berkeley site is done by a telemetry system which began operation in 1964.Using standard telephone lines, the system collects data simultaneously from all points, giving both the rate and the time-integrated intensity of radiation at each point.At the collection stations conven,.. tional counting equipment is used in conjunction with a simple device which converts scaler decade output signals into a form which is transmitted over telephone lines.and which directly activates electromechanical event-recorder moven1ents and impulse counters.Transmission of signals from two consecutive decades of a single scaler at a remote station over a single telephone line makes it possible to record a wide range of radiation intensities, extending over several orders of magnitude .For special applications apart from the regular operation of the system, telephone lines transmit 5 -1-1sec pulse signals and small countrate metering currents with noise interference practically elin1inated by means of ground isolation and common-mode rejection techniques.