Nudging ions into strings and spirals.
Walther and his colleagues found that as they increase the number of positively charge magnesium ions in their doughnut-shaped electrical trap, the ions first form a line, then buckle into a zigzag pattern, and eventually arrange themselves into a set of interwoven spirals along the trap's circular central axis. Finally, with thousands of ions in the trap, they settle into an array of concentric shells. These observations fit with theoretical predictions of the patterns that should arise under such circumstances. The researchers report their results in the May 28 NATURE.
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|Title Annotation:||trapped ions can be made to organize into patterns for packing into accelerator beams|
|Article Type:||Brief Article|
|Date:||Jul 11, 1992|
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