In this research, the X-ray emission from a small 2.3 kJ plasma focus is investigated by varying type of gas and operating parameters of the plasma focus operating at the pressure between 0.5 to 2.5 mbar. Time–Resolved X-ray measurements are used to measure the electron temperature and Time–Integrated X-ray imaging is used to show the focusing point. The electron temperature of argon plasma significantly relates to the X-ray signals obtained. It is found that X-ray from argon is a combination of soft and hard X-rays. For oxygen and nitrogen, the X-ray from CuKD is found to be dominant. The intensity of X-ray from argon is higher than oxygen and nitrogen. Multiple Focusing points are shown to be vertically aligned on top of the anode with an average length between 5.5 _13.5 mm . Oxygen and Nitrogen gas produce long columnar structure. It is found that argon plasma produces most intense focusing spots.