Plasma Physics and Nuclear FusionOutlineSlide 3Slide 4Slide 5Slide 6Slide 7Slide 8Advantages of FusionSlide 10Slide 11Requirements for FusionSlide 13Two ApproachesMagnetic ConfinementSlide 16Slide 17Slide 18Slide 19Slide 21Slide 22Slide 23Slide 25Slide 26Plasma Physics and Nuclear FusionJ. C. SprottDepartment of PhysicsUniversity of Wisconsin - MadisonPresented toPhysics 208on October 30, 1998OutlineFission versus FusionRequirements for FusionPlasma CharacteristicsPlasma ConfinementExperimental DevicesAdvantages of FusionInexhaustible Supply of FuelRelatively Safe and CleanPossibility of Direct ConversionRequirements for FusionHigh TemperaturesAdequate DensitiesAdequate ConfinementLawson Criterion: n > 1020 s/m3Two ApproachesInertial Confinement: n 1030 / m3 10-10 sMagnetic Confinement: n 1020 / m3 1 sMagnetic ConfinementMagnetic Field Limit: B < 5 TPressure Balance: nkT 0.1B2/20==> n 1020 / m3 @ T = 108 KAtmospheric density is 2 x 1025 / m3Good vacuum is requiredPressure: nkT 1 atmosphereConfinement: 1 sA 10 keV electron travels 30,000 miles in 1
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