Portable information terminal, beam irradiation system, and program

A beam irradiation system comprising:

• a charged particle beam irradiation apparatus for performing processing of a sample by irradiating the sample with a charged particle beam;
• and
• a portable information terminal separate from the charged particle beam irradiation apparatus,
• wherein the portable information terminal includes a display controller causing a display unit to display an image containing a graphical user interface (GUI) capable of operating a first operation item based on operation by a user, the first operation item being at least a part of operation items among operation items operable in the charged particle beam irradiation apparatus;
• and
• an output controller causing an output unit to output an output of a type according to the first operation item assigned to the GUI operated by the user, wherein
• different first operation items are assigned to the GUI, and
• the output unit is a speaker and the output controller causes the output unit to output an audible sound of the type as the output of the type.