Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Patent
1977-09-06
1979-09-11
Dixon, Harold A.
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
250281, B01D 5944
Patent
active
041676688
ABSTRACT:
This invention deals with a process of separating isotopes. Isotopes of atomic mass m.sub.1 and m.sub.2 are in a plasma. Isotope m.sub.1 is of low concentration and isotope m.sub.2 is dominant. The plasma is submitted to a time constant uniform magnetic field and to an orthogonal high frequency electric field. To facilitate the separation a third isotope of atomic mass m.sub.3 is included in the plasma. The atomic mass m.sub.3 of the third isotope is such that m.sub.3 =2m.sub.1 -m.sub.2 and its concentration is (for all practical purposes) equal to that of the dominant isotope. The frequency of the electric field is adjusted to the value of the cyclotron frequency of the isotope of mass m.sub.1 in the plasma. One thus compensates the polarization of the plasma due to the dominant isotope and increases the tolerance of the process to the natural fluctuations of the plasma. The ions of the isotope 1 are collected at the extremity of the plates (12) and (14), while those of the isotopes 2 and 3 are collected on ( 16).
The invention will find application in the separation of the two isotopes U.sub.235 and U.sub.238.
REFERENCES:
patent: B455520 (1975-01-01), Beauchamp
patent: 2868986 (1959-01-01), Lanneau et al.
"Thomson-CSF"
Dixon Harold A.
Plottel Roland
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