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Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998

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Page 1: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998

Plasma Physics and Nuclear Fusion

J. C. SprottDepartment of Physics

University of Wisconsin - Madison

Presented to

Physics 208

on October 30, 1998

Page 2: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998

Outline

Fission versus Fusion

Requirements for Fusion

Plasma Characteristics

Plasma Confinement

Experimental Devices

Page 3: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 4: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 5: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 6: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 7: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 8: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 9: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998

Advantages of Fusion

Inexhaustible Supply of Fuel

Relatively Safe and Clean

Possibility of Direct Conversion

Page 10: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 11: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 12: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998

Requirements for Fusion

High Temperatures

Adequate Densities

Adequate Confinement

Lawson Criterion: n >

1020 s/m3

Page 13: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 14: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998

Two Approaches

Inertial Confinement: n 1030 / m3

10-10 s

Magnetic Confinement: n 1020 / m3

1 s

Page 15: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998

Magnetic Confinement

Magnetic Field Limit: B < 5 T Pressure Balance: nkT 0.1B2/20

==> n 1020 / m3 @ T = 108 K Atmospheric density is 2 x 1025 / m3

Good vacuum is required Pressure: nkT 1 atmosphere Confinement: 1 s A 10 keV electron travels 30,000

miles in 1 s

Page 16: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 17: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 18: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 19: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 20: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 21: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 22: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 23: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998
Page 24: Plasma Physics and Nuclear Fusion J. C. Sprott Department of Physics University of Wisconsin - Madison Presented to Physics 208 on October 30, 1998

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