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Paul traps are devices that confine particles using an oscillating electricfield and have been used in undergraduate experimental classes at universities.Owing to the requirement of a high voltage of several thousand volts, no casesof use in middle and high schools are available. Therefore, we developed anall-in-one-type Paul trap device that included a high-voltage transformer. ThePaul trap can be equipped with three different types of electrode attachments,ring-type, and linear-type , and the trap image can be observed using abuilt-in web camera. For example, the charge-to-mass ratio of particles wasmeasured with different types of attachments, and it was shown that reasonablevalues could be obtained. This type of trap is currently used at severaleducational facilities in Japan.

Measurements of the charge-to-mass ratio of particles trapped by the Paul Trap for education