  We consider a variant of pursuit-evasion games where a single defender is
tasked to defend a static target from a sequence of periodically arriving
intruders. The intruders' objective is to breach the boundary of a circular
target without being captured and the defender's objective is to capture as
many intruders as possible. At the beginning of each period, a new intruder
appears at a random location on the perimeter of a fixed circle surrounding the
target and moves radially towards the target center to breach the target. The
intruders are slower in speed compared to the defender and they have their own
sensing footprint through which they can perfectly detect the defender if it is
within their sensing range. Considering the speed and sensing limitations of
the agents, we analyze the entire game by dividing it into partial information
and full information phases. We address the defender's capturability using the
notions of engagement surface and capture circle. We develop and analyze three
efficient strategies for the defender and derive a lower bound on the capture
fraction. Finally, we conduct a series of simulations and numerical experiments
to compare and contrast the three proposed approaches.
