Formation of a field reversed configuration for magnetic and electrostatic confinement of plasma

• US 7,180,242 B2
• Filed: 05/19/2005
• Issued: 02/20/2007
• Est. Priority Date: 02/01/2001
• Status: Expired due to Term

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Rostoker, Norman, Binderbauer, Michl, Tahsiri, Hooshang, Qerushi, Artan
• Primary Examiner(s): Dinh; Trinh Vo
• Application Number:
  US11/134,776
• Publication Number:
  US 20060039519A1
• Time in Patent Office: 642 Days
• Field of Search: 315/111.21, 315/111.41, 315/111.81, 315500-507, 118/723.FI, 118/723.R, 376/107
• US Class Current: 315/111.21
• CPC Class Codes: G21B 1/05 with magnetic or electric plasma confinement
• CPC Class Codes: G21B 1/052 reversed field configuration
• 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 1/03 using electrostatic fields
• CPC Class Codes: H05H 1/10 using externally-applied magnetic fields only , e.g. Q-machines, Yin-Yang, base-ball
• CPC Class Codes: H05H 1/12 wherein the containment vessel forms a closed or nearly closed loop G21B1/05 takes precedence
• CPC Class Codes: H05H 1/14 wherein the containment vessel is straight and has magnetic mirrors
• CPC Class Codes: H05H 1/16 using externally-applied electric and magnetic fields
• CPC Class Codes: Y02E 30/00 Energy generation of nuclear origin
• CPC Class Codes: Y02E 30/10 Nuclear fusion reactors

Abstract

A system and method for containing plasma and forming a Field Reversed Configuration (FRC) magnetic topology are described in which plasma ions are contained magnetically in stable, non-adiabatic orbits in the FRC. Further, the electrons are contained electrostatically in a deep energy well, created by tuning an externally applied magnetic field. The simultaneous electrostatic confinement of electrons and magnetic confinement of ions avoids anomalous transport and facilitates classical containment of both electrons and ions. In this configuration, ions and electrons may have adequate density and temperature so that upon collisions they are fused together by nuclear force, thus releasing fusion energy. Moreover, the fusion fuel plasmas that can be used with the present confinement system and method are not limited to neutronic fuels only, but also advantageously include advanced fuels.

Claims

1. A method of confining a plasma of ions and electrons within a chamber comprising the steps of

applying a magnetic field to the chamber,

forming a field reversed configuration (FRC) magnetic field within a chamber,

magnetically confining a plurality of plasma ions, and

electrostatically confining a plurality of plasma electrons,

wherein the step of forming an FRC magnetic field comprises the steps of

injecting ion beams into a background plasma within the reactor chamber and forming a rotating beam plasma,

generating a poloidal magnetic self-field about the rotating beam plasma, and

increasing the rotating beam plasma'"'"'s rotational velocity to increase the magnetic self-field'"'"'s magnitude beyond the applied magnetic field'"'"'s magnitude causing field reversal internal to the rotating beam plasma and formation of the FRC.

2. The method of claim 1 wherein step of increasing the rotating beam plasma'"'"'s rotational velocity includes the step of running current through a betatron flux coil within the chamber inducing an azimuthal electric field within the chamber.

3. The method of claim 2 further comprising the step increasing the current through the flux coil to accelerate the rotating beam plasma to a fusion relevant rotational energy.

4. The method of claim 3 further comprising the steps of injecting high energy ion beams into the FRC and trapping the beams in betatron orbits within the FRC.

5. A method of confining a plasma of ions and electrons within a chamber comprising the steps of

applying a magnetic field to the chamber, wherein the step of applying a magnetic field includes energizing a plurality of field coils extending about the chamber,

forming a field reversed configuration (FRC) magnetic field within a chamber,

magnetically confining a plurality of plasma ions, and

electrostatically confining a plurality of plasma electrons.

6. The method of claim 5 further comprising the step of injecting ion beams into the chamber.

7. The method of claim 5 further comprising the step of generating an electrostatic field within the chamber.

8. The method of claim 7 wherein the step of generating an electrostatic field includes applying an applied magnetic field at a magnitude that corresponds to an electrostatic field that is confining to a plurality of beam plasma electrons.

9. The method of claim 8 wherein the step of generating an electrostatic field includes injecting ion beams at a velocity that corresponds to an electrostatic field that is confining to a plurality of beam plasma electrons.

10. A of method confining a plasma of ions and electrons within a chamber comprising the steps of

applying a magnetic field to the chamber,

forming a field reversed configuration (FRC) magnetic field within a chamber,

magnetically confining a plurality of plasma ions,

electrostatically confining a plurality of plasma electrons, and

injecting ion beams into the chamber, wherein the ion beams are injected substantially transverse to the applied magnetic field.

11. The method of claim 10 wherein the step of injecting the ion beams further comprises the steps of

neutrilizing the ion beams,

draining the neutralized ion beams'"'"' electric polarization, and

exerting a Lorentz force due to the magnetic field on the neutralized ion beams to bend the ion beams into betatron orbits.

12. A method of confining a plasma of ions and electrons within a chamber comprising the steps of

applying a magnetic field to the chamber,

forming a field reversed configuration (FRC) magnetic field within a chamber,

magnetically confining a plurality of plasma ions,

electrostatically confining a plurality of plasma electrons, and

tuning the applied magnetic field'"'"'s magnitude to maintain the a rotating beam plasma at a predetermined radial size.

13. A method confining a plasma of ions and electrons within a chamber comprising the steps of

applying a magnetic field to the chamber,

injecting beams comprising a plurality of ions and electrons into a plasma of ions and electrons in a chamber,

forming a field reversed configuration (FRC) magnetic field within the chamber,

magnetically confining a plurality of plasma ions within the chamber, and

electrostatically confining a plurality of plasma electrons within the chamber,

wherein the step of forming an FRC magnetic field comprises the steps of

injecting ion beams into a background plasma within the reactor chamber and forming a rotating beam plasma,

generating a poloidal magnetic self-field about the rotating beam plasma, and

increasing the rotating beam plasma'"'"'s rotational velocity to increase the magnetic self-field'"'"'s magnitude beyond the applied magnetic field'"'"'s magnitude causing field reversal internal to the rotating beam plasma and formation of the FRC.

14. The method of claim 13 wherein step of increasing the rotating beam plasma'"'"'s rotational velocity includes the step of running current through a betatron flux coil within the chamber inducing an azimuthal electric field within the chamber.

15. The method of claim 14 further comprising the step increasing the current through the flux coil to accelerate the rotating beam plasma to a fusion relevant rotational energy.

16. The method of claim 15 further comprising the steps of injecting high energy ion beams into the FRC and trapping the beams in betatron orbits within the FRC.

17. A method confining a plasma of ions and electrons within a chamber comprising the steps of

applying a magnetic field to the chamber, wherein the step of applying a magnetic field includes energizing a plurality of field coils extending about the chamber,

injecting beams comprising a plurality of ions and electrons into a plasma of ions and electrons in a chamber,

forming a field reversed configuration (FRC) magnetic field within the chamber,

magnetically confining a plurality of plasma ions within the chamber, and

electrostatically confining a plurality of plasma electrons within the chamber.

18. A method confining a plasma of ions and electrons within a chamber comprising the steps of

applying a magnetic field to the chamber,

injecting beams comprising a plurality of ions and electrons into a plasma of ions and electrons in a chamber, wherein the ion beams are injected substantially transverse to the applied magnetic field,

forming a field reversed configuration (FRC) magnetic field within the chamber,

magnetically confining a plurality of plasma ions within the chamber, and

electrostatically confining a plurality of plasma electrons within the chamber.

19. A method confining a plasma of ions and electrons within a chamber comprising the steps of

injecting beams comprising a plurality of ions and electrons into a plasma of ions and electrons in a chamber, wherein the step of injecting the ion beams further comprises the step of neutrilizing the ion beams,

magnetically confining a plurality of plasma ions within the chamber, and

electrostatically confining a plurality of plasma electrons within the chamber.

20. The method of claim 19 further comprising the steps of applying a magnetic field to the chamber and forming a field reversed configuration (FRC) magnetic field within the chamber.

21. The method of claim 19 wherein the beams are injected at a velocity and the applied magnetic field is applied at a magnitude that corresponds to electrostatic field within the chamber that is confining for a plurality of plasma electrons.

22. A method confining a plasma of ions and electrons within a chamber comprising the steps of

applying a magnetic field to the chamber,

injecting beams comprising a plurality of ions and electrons into a plasma of ions and electrons in a chamber, wherein the beams are injected at a velocity and the applied magnetic field is applied at a magnitude that corresponds to an electrostatic field within the chamber that is confining for a plurality of plasma electrons,

forming a field reversed configuration (FRC) magnetic field within the chamber,

magnetically confining a plurality of plasma ions within the chamber,

electrostatically confining a plurality of plasma electrons within the chamber, and

adjusting the applied magnetic field'"'"'s magnitude to maintain the rotating beam plasma at a predetermined radial size.