Adiabatic inversion for selective excitation

Details Adiabatic inversion for selective excitation Adiabatic inversion for selective excitation

1974-06-25

1979-05-22

Church, Craig E.

Radiant energy

Ion generation

Field ionization type

250284, H01J 3708

Patent

active

041561449

ABSTRACT:
Method and apparatus for achieving isotopically selective adiabatic inversion, particularly for improved isotope separation efficiency. In a preferred embodiment for practicing the invention, chirped laser radiation induces photoionization of a vapor state material in isotopically selective excitation and ionization energy steps. A frequency sweep or "chirp" is provided in the excitation laser radiation at a controlled rate and over a range of frequencies which is limited to prevent loss of selectivity in the excitation. The frequency swept radiation has a theoretical capability of producing 100% inversion of ground state particles in the vapor. The features of the invention additionally permit excitation of a material to very high energy states useful in producing high frequency, ultraviolet lasing.

REFERENCES:
patent: 4023038 (1977-05-01), Janes
patent: 4038549 (1977-07-01), Janes

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