Small Spherical Focus A spherical focus has been designed recently which for intense X-ray production. The geometry of the system consists of two concentric hemi-spheres insulated from each others by ceramic disc and with two ports at each. Theoretical simulation of the current sheath dynamics shows a simple relation where only radial phase exist. The focus density was one order higher than Mather type which the plasma temperature is in the same order. The construction, theory, and test results are discussed in detail. Small Spherical Focus A spherical focus has been designed recently which for intense X-ray production. The geometry of the system consists of two concentric hemi-spheres insulated from each others by ceramic disc and with two ports at each. Theoretical simulation of the current sheath dynamics shows a simple relation where only radial phase exist. The focus density was one order higher than Mather type which the plasma temperature is in the same order. The construction, theory, and test results are discussed in detail.