A field of heliostats is used in concentrating solar power (CSP) plants to concentrate sunlight onto a solar receiver, to convert the solar radiation into high temperature process heat for various applications. In the past few decades, various studies have been conducted on the concentrated solar thermal and thermochemical applications. In order to study and enhance these applications, high-flux solar simulators are required to test various components under controlled irradiance conditions. In this study, the design and development of a novel single- source solar simulator has been carried out. This high-flux solar simulator will be used to investigate the thermochemical and natural convection processes of volumetric solar receiver-reactors. The simulator consists of 7 kW xenon arc lamp and a truncated ellipsoid reflector, air-cooling system and 10 kW power supply. This solar simulator design features a movable light source, both along the axial and vertical direction. To enable high-temperature material testing and enhance the performance of solar thermochemical reactor, this system will be used.