Development of a Kingdon ion trap system for trapping externally injected highly charged ions

We have developed a Kingdon ion trap system for the purpose of the laboratory observation of the x-ray forbidden transitions of highly charged ions (HCIs). Externally injected Ar(q+) (q = 5-7) with kinetic energies of 6q keV were successfully trapped in the ion trap. The energy distribution of trapp...

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Bibliographic Details
Published in:Review of scientific instruments 2014-10, Vol.85 (10), p.103119-103119
Main Authors: Numadate, Naoki, Okada, Kunihiro, Nakamura, Nobuyuki, Tanuma, Hajime
Format: Article
Language:English
Subjects:
ARGON IONS
Charge transfer
Collision dynamics
COLLISIONS
Computer simulation
COMPUTERIZED SIMULATION
CROSS SECTIONS
Energy distribution
ENERGY SPECTRA
EV RANGE
FORBIDDEN TRANSITIONS
HYDROGEN
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Ions
KEV RANGE
KINETIC ENERGY
MULTICHARGED IONS
Performance tests
Scaling formulae
TIME-OF-FLIGHT MASS SPECTROMETERS
TRAPPING
X RADIATION
X ray spectra
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Summary:We have developed a Kingdon ion trap system for the purpose of the laboratory observation of the x-ray forbidden transitions of highly charged ions (HCIs). Externally injected Ar(q+) (q = 5-7) with kinetic energies of 6q keV were successfully trapped in the ion trap. The energy distribution of trapped ions is discussed in detail on the basis of numerical simulations. The combination of the Kingdon ion trap and the time-of-flight mass spectrometer enabled us to measure precise trapping lifetimes of HCIs. As a performance test of the instrument, we measured trapping lifetimes of Ar(q+) (q = 5-7) under a constant number density of H2 and determined the charge-transfer cross sections of Ar(q+)(q = 5, 6)-H2 collision systems at binary collision energies of a few eV. It was confirmed that the present cross section data are consistent with previous data and the values estimated by some scaling formula.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4899266