| 摘要 |
An orthogonal acceleration TOF (time-of-flight) mass spectrometer is offered which is not affected by the voltage withstanding performance of ion detection means. The mass spectrometer has: an ion source for ionizing a sample; a conductive box into which the created ions are introduced; ion acceleration means placed inside or behind the conductive box and causing the ions to be accelerated in a pulsed manner in synchronism with a signal giving a starting point of measurement; and ion detection means for detecting the ions in synchronism with the acceleration of the ions. The conductive box is provided with an ion injection port and an ion exit port. A voltage is applied to the conductive box. This voltage is switched in synchronism with the signal giving the starting point of the measurement. |
