Controlled fusion in a field reversed configuration and direct energy conversion

• US 6,628,740 B2
• Filed: 02/14/2002
• Issued: 09/30/2003
• Est. Priority Date: 10/17/1997
• Status: Expired due to Term

• Current Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida), Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Rostoker, Norman, Monkhorst, Hendrik J.
• Primary Examiner(s): Behrend, Harvey E.
• Application Number:
  US10/077,661
• Publication Number:
  US 20030007587A1
• Time in Patent Office: 593 Days
• Field of Search: 376/147, 376/134, 376/139, 376/140, 376/107, 313/62, 315/502
• US Class Current: 376/147
• CPC Class Codes: G21B 1/052 reversed field configuration
• CPC Class Codes: G21B 1/11 Details
• CPC Class Codes: G21D 7/00 Arrangements for direct production of electric energy from fusion or fission reactions obtaining electric energy from radioactive sources G21H1/00
• CPC Class Codes: H05H 1/12 wherein the containment vessel forms a closed or nearly closed loop G21B1/05 takes precedence
• CPC Class Codes: Y02E 30/00 Energy generation of nuclear origin
• CPC Class Codes: Y02E 30/10 Nuclear fusion reactors

Abstract

A system and apparatus for controlled fusion in a field reversed configuration (FRC) magnetic topology and conversion of fusion product energies directly to electric power. Preferably, plasma ions are magnetically confined in the FRC while plasma electrons are electrostatically confined in a deep energy well, created by tuning an externally applied magnetic field. In this configuration, ions and electrons may have adequate density and temperature so that upon collisions they are fused together by the nuclear force, thus forming fusion products that emerge in the form of an annular beam. Energy is removed from the fusion product ions as they spiral past electrodes of an inverse cyclotron converter. Advantageously, the fusion fuel plasmas that can be used with the present confinement and energy conversion system include advanced (aneutronic) fuels.

Claims

1. A method of converting fusion product energies into electric power, comprising the steps of

injecting ions along a helical path within a tapered cylindrical cavity formed by first and second tapered hemi-cylindrical electrodes in spaced relation with first and second elongate gaps formed there between, and

converting at least a portion of the ion energy into electrical energy.

2. The method of claim 1, further comprising the step of applying an oscillating potential to the first and second electrodes.

3. The method of claim 2, further comprising the step of creating an azimuthal electric field across the first and second gaps.

4. The method of claim 3, further comprising the step of decelerating the ions.

5. The method of claim 4, wherein the injecting step includes converting substantially all of the ions axial energy to rotational energy.

6. The method of claim 5, wherein the ions are injected in the form of an annular beam.

7. The method of claim 6, further comprising the step of directing the annular beam through a magnetic cusp.

8. The method of claim 7, further comprising the step of collecting charge neutralizing electrons from the annular beam as the electrons follow magnetic field lines of the magnetic cusp.

9. The method of claim 8 further comprising the step of collecting the ions once a substantial portion of their energy is converted to electric energy.

10. The method of claim 9 further comprising the step of conditioning the electric energy converted from the ion energy to match existing power grids.

11. The method of claim 7 further comprising the step of creating the magnetic cusp.

12. The method of claim 11 further comprising the steps of creating first and second magnetic fields within the cavity, wherein field lines of the first and second magnetic fields extend in opposing directions, and joining the first and second magnetic fields.

13. A method of converting fusion product energies into electric power, comprising the steps of

injecting ions along a helical path within a tapered cylindrical cavity formed by first and second tapered hemi-cylindrical electrodes in spaced relation with first and second elongate gaps formed there between,

converting substantially all of the ions axial energy to rotational energy, and

converting at least a portion of the ion energy into electrical energy.

14. The method of claim 13, further comprising the step of applying an oscillating potential to the first and second electrodes.

15. The method of claim 14, further comprising the step of creating an azimuthal electric field across the first and second gaps.

16. The method of claim 15, further comprising the step of decelerating the ions.

17. The method of claim 13 further comprising the step of creating a magnetic cusp.

18. The method of claim 17 further comprising the steps of creating first and second magnetic fields within the cavity, wherein field lines of the first and second magnetic fields extend in opposing directions, and joining the field lines of the first and second magnetic fields.

19. The method of claim 18, wherein the ions are injected in the form of an annular beam.

20. The method of claim 19, further comprising the step of directing the annular beam through a magnetic cusp.

21. The method of claim 20, further comprising the step of collecting charge neutralizing electrons from the annular beam as the electrons follow magnetic field lines of the magnetic cusp.

22. The method of claim 16 further comprising the step of collecting the ions once a substantial portion of their energy is converted to electric energy.

23. The method of claim 16 further comprising the step of conditioning the electric energy converted from the ion energy to match existing power grids.

24. A method of converting fusion product energies into electric power, comprising the steps of

creating first and second magnetic fields within a cavity formed in part by first and second tapered hemi-cylindrical electrodes in spaced relation with first and second elongate gaps formed there between, wherein field lines of the first and second magnetic fields extend in opposing directions,

joining the field lines of the first and second magnetic fields to form a magnetic cusp,

injecting ions in the form of an annular beam along a helical path within the cavity,

directing the annular beam through the magnetic cusp, and

converting at least a portion of the ion energy into electrical energy.

25. The method of claim 24, further comprising the step of applying an oscillating potential to the first and second electrodes.

26. The method of claim 24, further comprising the step of creating an azimuthal electric field across the first and second gaps.

27. The method of claim 26, further comprising the step of decelerating the ions.

28. The method of claim 24, wherein the injecting step includes converting substantially all of the ions axial energy to rotational energy.

29. The method of claim 24, further comprising the step of collecting charge neutralizing electrons from the annular beam as the electrons follow magnetic field lines of the magnetic cusp.

30. The method of claim 27 further comprising the step of collecting the ions once a substantial portion of their energy is converted to electric energy.

31. The method of claim 27 further comprising the step of conditioning the electric energy converted from the ion energy to match existing power grids.