Patent ID: 7365314
Filing Date: 2008-04-29
Classification: H01J

Abstract:
1. A single-particle mass spectrometer, comprising: a chamber keeping an inside in a vacuum state by a vacuum pump; a cylindrical flying tube installed to communicate with the chamber; an aerodynamic lens installed to the chamber to focus aerosol particles input from outside; a laser generating means for irradiating a laser beam to the particles focused by the aerodynamic lens to emit ions; an extraction acceleration means for extracting the emitted ions and accelerating the ions to fly along the flying tube, the extraction acceleration means including: a cylindrical electrode arranged at the same axis as the extraction acceleration means and refracting the ions flying by the extraction acceleration means toward a central axis; an Einzel lens arranged in the flying tube at regular intervals to focus the ions, accelerated and flying by means of the extraction acceleration means, toward a central axis of the flying tube; and the ion detector installed to an end of the flying tube to detect the ions flying along the flying tube, wherein the ions are extracted and accelerated by means of a voltage difference between the semispherical reflector and the grid and fly at a uniform velocity along the flying tube toward the ion detector.