Keys:
There are essentially two types of interlocks and associated keys: white and other. A "white key" interlock is an interlock that leads directly to the CESR tunnel or to an area that cannot be entered when the beam is on. At no time while the linac or CESR is running can you enter a white interlock without tripping an interlock and dumping the beam.
Other interlocks, located in CHESS West and CHESS East can be set in "bypass" mode with a color-coded key that allows users and personnel to pass through interlocks to the experimental floor and work stations even when CESR is on. The CHESS West interlock requires a yellow key be in place to set it in bypass mode. The CHESS East interlock requires a blue key. The yellow or blue key cannot be removed while the synchrotron is on - if you do so, the interlock will become activated and if anyone passes through it, CESR will be shut down.
To find out more about the color-coded keys and
the areas they allow access to, speak with the Operations Manager or
an experienced CHESS Operator.
