| 摘要 |
PROBLEM TO BE SOLVED: To provide an ion trap with improved performance without a large increase in complexity, cost, or power consumption.SOLUTION: An ion trap for a mass spectrometer has a conductive central electrode 202 with an aperture extending from a first open end to a second open end. A conductive first electrode end cap is disposed proximate to the first open end thereby forming a first intrinsic capacitance 209 between the first end cap 201 and the central electrode. A conductive second electrode end cap is disposed proximate to the second open end thereby forming a second intrinsic capacitance 208 between the second end cap 203 and the central electrode. A first circuit couples the second end cap to a reference potential. A signal source generating an AC trap signal is coupled to the central electrode. An excitation signal is impressed on the second end cap in response to a voltage division of the trap signal by the first intrinsic capacitance and the first circuit. |
