Nuclear reactivity control using laser induced polarization
Patent 5063019 Issued on November 5, 1991. Estimated Expiration Date: 
May 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3227619 3629068 InventorAssigneeApplicationNo. 527457 filed on 05/23/1990US Classes:376/331Gaseous control componentExaminersPrimary: Behrend, Harvey E.Attorney, Agent or FirmInternational ClassG21C 007/06AbstractA control element for reactivity control of a fission source provides an atomic density of 3 He in a control volume which is effective to control criticality as the 3 He is spin-polarized. Spin-polarization of the 3 He affects the cross section of the control volume for fission neutrons and hence, the reactivity. An irradiation source is directed within the 3 He for spin-polarizing the 3 He. An alkali-metal vapor may be included with the 3 He where a laser spin-polarizes the alkali-metal atoms which in turn, spin-couple with 3 He to spin-polarize the 3 He atoms.Other References
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