A new direct-connect supersonic combustor has been designed and tested for studies (and corresponding simulation-based predictions) of laser-induced ignition. The new combustor will interface with the ACT-II supersonic combustion tunnel to perform studies on plasma-assisted ignition in an ethylene-fueled supersonic flow. This paper described the combustor design and geometry, the flow characteristics and initial experimental results. The supersonic combustor includes a cavity flame-holder, where ethylene fuel is injected, mixed with entrained air, and ignited. Two injector configurations are included, one horizontal and one vertical, directed in such a way to enhance the cavity flow recirculation. Two different plasma ignition mechanisms were considered, 1) a laser induced plasma (LIP) located at the center of the cavity and 2) a spark plug placed on the bottom surface of the cavity. The diagnostics tools tested to characterize the flow include time-resolved pressure measurements, high-speed schlieren visualization and OH* chemiluminescence visualization, and instantaneous planar laser induced fluorescence (PLIF) of the CH radical.