Patent ID: 11885321
Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC F  B | IPC F

Claim 20:
21. A method for starting an operation of a cryopump, the cryopump including a non-combustible adsorbent, the method comprising:
measuring a temperature of the non-combustible adsorbent;
dehydrating the non-combustible adsorbent by exposing the non-combustible adsorbent to a dry atmosphere at room temperature or a temperature higher than the room temperature;
evacuating an environment around the non-combustible adsorbent after the dehydration of the non-combustible adsorbent; and
cooling the non-combustible adsorbent to a cryogenic temperature in a vacuum atmosphere,
wherein the dehydrating is executed in a case where the non-combustible adsorbent is at the room temperature, based on the measured temperature of the non-combustible adsorbent.