plasma physics and nuclear fusion j. c. sprott department of physics university of wisconsin -...
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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](https://reader036.vdocuments.us/reader036/viewer/2022062517/56649e7f5503460f94b838b2/html5/thumbnails/1.jpg)
Plasma Physics and Nuclear Fusion
J. C. SprottDepartment of Physics
University of Wisconsin - Madison
Presented to
Physics 208
on October 30, 1998
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Outline
Fission versus Fusion
Requirements for Fusion
Plasma Characteristics
Plasma Confinement
Experimental Devices
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Advantages of Fusion
Inexhaustible Supply of Fuel
Relatively Safe and Clean
Possibility of Direct Conversion
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Requirements for Fusion
High Temperatures
Adequate Densities
Adequate Confinement
Lawson Criterion: n >
1020 s/m3
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Two Approaches
Inertial Confinement: n 1030 / m3
10-10 s
Magnetic Confinement: n 1020 / m3
1 s
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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
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