Abstract

Poster Presentations

Day 1: Wednesday, May 18  Poster Room(Icho)

Rotating Electric Fields Mass Analyzer and Size Distribution Measurement of Ar G.C.I.B.

(1TANDEM, 2Univ. Hyogo, 3Nihon Univ., 4Ampere Inc., 5Tokyo Univ. Sci.)
oMasanao Hotta1, Kousuke Moritani2, Satoshi Kurumi3, Tatsuya Adachi4, Takashi Kusanagi4, Kaoru Suzuki3, Masashi Nojima5

Mass measurement of macromolecules or nanoparticles has been a subject of great interest, but their mass are too high for conventional mass analyzers, and too low for mechanical balance. Although several types of mass analyzers have been developed to fill the blank, it is not yet achieved to identify mass values accurately. To make a breakthrough in the status quo, a model using two rotating electric fields is investigated, which comprises two rotating electric field (REF) units lined in tandem and in coaxial with the ion beam path. It is revealed that the two REF units work as a mass analyzer and are available for mass measurement of high mass molecules or particles said above, when the frequency of the rotating electric fields are kept in synch with the velocity of ions having mass of interest (specified mass ions), and phase angle of electric fields differ from each other by 180 degree. The trajectories of specified mass ions are determined precisely from macroscopic parameters of the analyzer, regardless of whether the mass is high or low, which means that the trajectories of the specified mass ions are independent from the mass value, or the analyzer has extremely wide mass range.