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キーワード:
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要旨:
Electron beam ion traps (EBITs) are efficient tools for highly charged ion (HCI)
production and studies. However, due to the high ion temperature inside of an
EBIT (on the order of MK), laser spectroscopy on HCIs is severely constrained by
Doppler broadening. A novel cryogenic linear Paul trap experiment in-line with an
EBIT will allow for trapping and sympathetic cooling of HCIs by nine orders of
magnitude, down to the mK range, and thus for resolving the natural linewidth
of forbidden optical transitions in HCI. To connect both instruments, a compact
low energy beamline has been designed, assembled and successfully commissioned
in this thesis. The deceleration, time-focussing and reduction in energy spread of the
ion bunches is performed by two specifically shaped electrodes and is based on the
pulsed drift tube method. The setup allows for efficient ion transfer at reasonable
high kinetic energy and injection of decelerated HCIs at low kinetic energy into the
Paul trap.
The possibility to determine the current charge state distribution of ions in the
EBIT plasma in pulsed extraction mode with a time-of-flight technique allowed for
the observation of KLL dielectronic recombination resonances in argon and neon.
