Patent ID: 8501624

Claim:
A method of varying ion current output of specific ion species from an ion source, comprising: a. supplying the ion source comprising: an ion chamber housing defining an ion source chamber, said housing having one or more inlets; and a remote plasma generator having an output in communication with one of said inlets, wherein said remote plasma generator transforms gas supplied by a gas source into an altered state comprising one or more of: plasma, ions, excited neutrals, and metastable molecules prior to delivery to said ion source chamber; b. energizing said remote plasma generator to create said gas in said altered state that is then delivered to said ion source; c. changing pressure in the remote plasma generator from a first pressure range to a second pressure range; d. extracting a first ion beam from the ion source chamber when the pressure in the remote plasma generator is within the first pressure range; and e. extracting a second ion beam from the ion source chamber when the pressure in the remote plasma generator is within the second pressure range.