Jefferson Lab declares an experiment complete when it has received the allotment of integrated beam or hours of operation approved by the laboratory.
An experiment is inactive when all unusual hazards associated with the operation of the experiment have been removed. Upon completion of the experiment, an inspection is performed by Physics division to ensure that the beamline is disabled, flammable gas systems are inoperative, mechanical transporters are locked out, pressure and vacuum vessels are vented, etc. The only experiment hazards remaining during the inactive state are those routinely accepted by the general public.
During this phase, the Director makes a decision to decommission the
experiment or to
authorize modifications and improvements for future running. Note that
subsystems may be
operated for testing purposes after a review and with the approval of the
Associate Director for Physics.