CPC Subgroup
H01J 41/12 Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
Full Title
Discharge tubes for measuring pressure of introduced gas ; Discharge tubes for evacuation by diffusion of ions > Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
2 direct subcodes
Child Classifications
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- H01J 41/14 with ionisation by means of thermionic cathodes
- H01J 41/18 with ionisation by means of cold cathodes