Non-BPS Dp-Brane in the Background of NS5-Branes on Transverse R^3xS^1

This paper is devoted to the study of non-BPS Dp-branes in the presence of NS5-branes on transverse R^3xS^1.We will formulate the tachyon effective action in this background and then we will discuss its properties. Then we will study the solutions of the equations of motion that describe lower dimensional BPS and non-BPS D-branes.