Study of Cylindrical Ion Trap with New Periodic Impulsional Potential Form

Ion trap mass spectrometry has developed though several stages to their current stage of relatively high performance and increasing popularity [1]. Quadrupole ion trap (QIT) invented by Paul and Steinwedel [2] has been widely applied to mass spectrometry [3-6], ion cooling and spectroscopy [7], frequency standards [8], quantum computing [9] and so on. To apply to various objectives, various geometries of ion trap for the mass spectrometer has been suggested [10]. The CIT has received much attention of a number of research groups because of several merits. The CIT is easier to fabricate than the Paul ion trap which has hyperbolic surfaces [11]. And the relative simplicity and small size of the CIT make it an ideal candidate for miniaturization. With these interests, many groups in, such as Purdue University [12] and Oak Ridge National Laboratory [13] have researched on the applications of the CIT to a miniaturized mass spectrometer. In this article, the physical properties of the confined ions of the rectangular CIT supplied with a new periodic impulsional potential form is studied and compared. shows the electronics configuration of CIT, that is to say a combinations of d.c. voltage, U and an alternative dc