Patent ID: 11894211
Assignee: HITACHI HIGH-TECH CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A method for controlling an electron beam apparatus including an electron gun configured to emit an electron beam and an electron gun chamber to which a sputter ion pump and a non-evaporable getter pump are connected, the method comprising:
a gas supply step of supplying at least one gas, wherein the gas is at least one of hydrogen, oxygen, carbon monoxide, and carbon dioxide to the electron gun chamber,
providing a gas generation source configured to generate the at least one gas, wherein:
the gas generation source is an alloy configured to occlude the at least one gas,
the alloy is a same material as the non-evaporable getter pump, and
a surface area of the alloy is smaller than a surface area of the non-evaporable getter pump.