A sealed source containing the radioactive material
is swaged (crimped) to one end of a flexible steel
leader, commonly referred to as the source holder or pi
gtail. A stainless steel
stop-ball and a stainless
steel connector are swaged to the opposite end of the
source holder. The stop-ball provides the means to
secure the source assembly within the exposure
device's locking mechanism. The source assembly
connector provides the means to attach the control cable connector to enable remote projection and
retraction of the source assembly. The source asse
mbly connector and projector locking mechanism are
designed so that the sealed source cannot be pr
ojected from the exposure device unless it has been
properly coupled to the control cable connecto
r and the remote control. (See figure 3.1)