Simple and efficient photo-ionization loading of ions for precision ion-trapping experiments

We report a simple and efficient method to load a Paul trap with Ca ions. A beam of neutral atomic calcium is ionized in a two-step photo-ionization process using uv-diode lasers near 423 nm and 390 nm. Photo-ionization of a calcium beam for loading a Paul trap has first been demonstrated by Kjaerga...

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Published inApplied physics. B, Lasers and optics Vol. 73; no. 8; pp. 861 - 863
Main Authors Gulde, S., Rotter, D., Barton, P., Schmidt-Kaler, F., Blatt, R., Hogervorst, W.
Format Journal Article
LanguageEnglish
Published 01.12.2001
Subjects
Beams (radiation)
Calcium
Cross sections
Diodes
Electron bombardment
Field ionization
Lasers
Rydberg states
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Summary:We report a simple and efficient method to load a Paul trap with Ca ions. A beam of neutral atomic calcium is ionized in a two-step photo-ionization process using uv-diode lasers near 423 nm and 390 nm. Photo-ionization of a calcium beam for loading a Paul trap has first been demonstrated by Kjaergaard et al. The advantages of our method are the use of cheap and easily handled diode-laser systems and the large cross section for field ionization when exciting high-lying Rydberg states. Finally, we discuss the advantages of photo-ionization for ion generation compared to loading by electron bombardment.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0946-2171
1432-0649
DOI:10.1007/s003400100749