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Hi! For the gas discharge in vacuum, either DC or RF/MW, the pressure should be about 10^-2 Torr. An oil diffusion pump is ok. However, the background should be lower than 10^-5 Torr in case pollution, for which sputtering pump must be used.
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6Â¥: Originally posted by johnma at 2013-05-09 03:45:32
Hi! For the gas discharge in vacuum, either DC or RF/MW, the pressure should be about 10^-2 Torr. An oil diffusion pump is ok. However, the background should be lower than 10^-5 Torr in case pollutio ...

Thanks for your help!
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