The research of micro-region emission state for thermal dispenser cathode surface, especially in-situ observation and analysis, is an important subject in the field of thermal cathode. A newly developed instrument aiming at meeting the special operation requirements of thermal dispenser cathode is used to carry out this research. This instrument combines the functions of deep ultraviolet laser photo-emission electron microscope and thermal-emission electron microscope, so it is called DUV-PEEM/TEEM. In this...