Beam Enclosure : The structure which houses the accelerator and experimental target areas. It is interlocked during accelerator operation to prevent personnel access
Jefferson Lab, Radiation Worker Glossary, Newport News, VA, USA 2007. http://www.jlab.org/div_dept/train/rad_guide/gloss ary.html, (Rad Sfty, Prot and Cont - Amer) {1005}