Chipmunk IV: development of and experience with a new generation of radiation area monitors for accelerator applications

The operation of a high-energy accelerator complex presents challenging problems for radiation monitoring during “beam-on” conditions. As a response to these needs, Fermilab has developed several families of radiation monitoring instruments intended for use under beam-on conditions. One of these instruments is a tissue equivalent, ion chamber based, area monitor called a “Chipmunk”. This article describes the latest version of these monitors, specifically the Chipmunk IV, as developed at Fermilab.