초록 ▼

A rotating field mass and velocity analyzer having a cell with four walls, time dependent RF potentials that are applied to each wall, and a detector. The time dependent RF potentials create an RF field in the cell which effectively rotates within the cell. An ion beam is accelerated into the cell a

A rotating field mass and velocity analyzer having a cell with four walls, time dependent RF potentials that are applied to each wall, and a detector. The time dependent RF potentials create an RF field in the cell which effectively rotates within the cell. An ion beam is accelerated into the cell and the rotating RF field disperses the incident ion beam according to the mass-to-charge (m/e) ratio and velocity distribution present in the ion beam. The ions of the beam either collide with the ion detector or deflect away from the ion detector, depending on the m/e, RF amplitude, and RF frequency. The detector counts the incident ions to determine the m/e and velocity distribution in the ion beam.

대표청구항 ▼

[ What is claimed is:] [1.] A mass analyzer for identifying mass and velocity distributions in an ion beam comprising:a cell receiving said ion beam;means for creating a rotating RF field imparting a non-magnetic field within said cell, wherein said cell is a magnetic field free cell; anda detector

[ What is claimed is:] [1.] A mass analyzer for identifying mass and velocity distributions in an ion beam comprising:a cell receiving said ion beam;means for creating a rotating RF field imparting a non-magnetic field within said cell, wherein said cell is a magnetic field free cell; anda detector located in close proximity to said cell for counting ions in said ion beam.