| 研究実績の概要 |
In this research project, new concepts towards microscopic multipole traps have been investigated and several possibilities have been tested in the experiment. We have accomplished several tests of small trapping systems as used for extraction of ions from a gas-catcher cell. Using high-frequency circuits with guiding fields of more than 10 MHz, ions have been extracted from a planar electrode system using RF guiding electrodes in the order of 100 micrometer in size. Experience has also been obtained for the cryogenic operation of a previously existing Paul trap during various on-line experiments over the period of the grant.
The final goal of an independent microscopic multipole trap coupled to a mass spectrometer is further pending, but can be accomplished using the existing devices. By the experience obtained up to date, planar trap designs (i.e. printed electrodes on an insulating board) are most promising to for the realization of the trapping structure. Trapping systems with much smaller volume are necessary and can be realized by more narrow electrode boundaries, so that the motional space of the ions is restricted to enable a meaningful combination with a TOF mass spectrometer.
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