In order to study the characteristic of the multi-energy source (MES) system, data of the individual energy source should be obtained. However, the characteristics of each individual heat source have not yet been clarified. Simulations of these heat sources were mainly based on empirical formulas. To study the mechanism of the MES system, the characterization of the heat source such as energy distribution is very essential and therefore should be carried out. By understanding the actual behaviour of these heat sources, we can achieve more accurate modeling to meet the requirement for the control of the AM process.