OBSERVATION OF INSTABILITIES IN A PAUL TRAP WITH HIGHER-ORDER ANHARMONICITIES

Citation
R. Alheit et al., OBSERVATION OF INSTABILITIES IN A PAUL TRAP WITH HIGHER-ORDER ANHARMONICITIES, Applied physics. B, Lasers and optics, 61(3), 1995, pp. 277-283
Citations number
18
Categorie Soggetti
Physics, Applied",Optics
ISSN journal
09462171
Volume
61
Issue
3
Year of publication
1995
Pages
277 - 283
Database
ISI
SICI code
0946-2171(1995)61:3<277:OOIIAP>2.0.ZU;2-0
Abstract
Systematic measurements of the relative ion number stored in a Paul tr ap within the stability diagram given by the solution of the equation of motion reveal many lines, where only few or no ions can be confined . The observations can be explained by the presence of perturbations f rom higher-order components in the trapping potential, which is a quad rupole potential in the ideal case. The resonances follow the equation (n(r)/2) beta(r) + (n(z)/2) beta(z) = 1, n(r) + n(z) = N, where 2N is the order of the perturbation, n(r), n(z) are integer and beta(r), be ta(z) are stability parameters of the trap. The experiments were perfo rmed on H+ and H-2(+) ions, which are detected after a storage time of 0.3 s by ejection from the trap.