| http://www.w3.org/ns/prov#value | - An ion current generator in accordance with claim 36, whereinat least one of said lasers is a pulse laser, and said electric field is applied to a space between said electrode and said substrate after said pulse laser is supplied to said material atoms and before a life time of said Rydberg state to which said material atoms are excited by said pulse laser is over. 38.
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