CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 1998, Vol. 15 ›› Issue (4): 451-456.

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CALCULATION AND ELIMINATION OF MULTIPOLE POTENTIAL COMPONENTS IN A PRACTICAL

Cai Yong, Yan Min, Luo Xueli, Gao Kelin, Zhu Xiwen   

  1. Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, 430071
  • Received:1997-07-16 Revised:1998-01-24 Online:1998-07-25 Published:1998-07-25

Abstract: Multipole components of potential field are calculated by using a boundary element method in an RF ion trap, when there exist assembling imperfections and axial holes in the end-caps and a band-cut on the equatorial surface of the ring electrode. The variation of multipole components versus the dimensions of holes and band-cut are analyzed in detail. The calculated results indicate that when specific conditions are satisfied, some non-linear effects can be compensated partially each other and a nearly ideal quadrupole potential can be obtained.

Key words: RF Ion trap, Multipole potential

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