Patent ID: 8598520
Filing Date: 2013-12-03
Classification: H01J,Y10T

Abstract:
1. A particle inlet system for vacuum instrumentation, said particle inlet system comprising: a first chamber including a gas inlet orifice, a first opening, and a plurality of plates, wherein each of said plurality of plates has a plate opening therein and is located between said gas inlet orifice and said first opening, wherein said gas inlet orifice, an entirety of said plate openings, and said first opening are coaxially aligned; a second chamber connected to said first chamber at said first opening, having a second opening, and containing a multipole ion guide and, wherein said first opening and said second opening are aligned to a center axis of said multipole ion guide; a conical jet nozzle having a ringshaped opening around said second opening and located outside a volume defining said second chamber, wherein said conical jet nozzle concentrically points toward said center axis of said multipole ion guide; and a gas flow control device configured to control a flow of gas out of said conical jet nozzle to descend into said second chamber and along a direction from said second opening to said first opening.