| 摘要 |
A method of setting a fill time for a mass spectrometer including a linear ion is provided. The mass spectrometer is operated first in a transmission mode and ions are supplied to the mass spectrometer. Ions are detected as they pass through at least part of the mass spectrometer in a preset time period, to determine the ion current. From a desired maximum charge density for the ion trap and the ion current, a fill time for the ion trap is determined. The mass spectrometer is operated in a trapping mode to trap ions in the ion trap, and the ion trap is filled for the fill time, as just determined. This utilizes the ion trap to its maximum, while avoiding problems due to overfilling the trap, causing space charge effects.
|
