Patent ID: 7242008
Filing Date: 2007-07-10
Classification: H01J

Abstract:
1. An ion detector comprising: a microchannel plate having a front surface and a rear surface, wherein said microchannel plate generates electrons in response to the impact of an ion on said front surface; first biasing means for electrically biasing said rear of said microchannel plate; detecting means for detecting said electrons; second biasing means for electrically biasing said detecting means; generating means for generating a signal representative of the energy of said ion, said generating means being electrically connected to said detecting means; and coupling means for coupling the signal out at ground potential, wherein said detecting means includes an anode located in proximity to the rear surface of the microchannel plate, wherein said generating means includes a analyzer circuitry connected to said anode, wherein said rear surface of said microchannel plate is biased to a positive voltage, and said anode is biased to a positive voltage higher than the positive voltage of the rear surface of said microchannel plate, wherein said rear surface of said MCP is biased to 2kV, and said anode is biased to 2.5 kV.