Plasma science and applications 2013

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Plasma science and applications 2013

  1. 1. Plasma Physics: Fundamentals and Applications Dr. Sergey Korenev 1
  2. 2. Content • • • • • • Introduction to Plasma Physics. Fundamental aspects of Plasma Physics. Methods and equipment for plasma forming. Applications of atmospheric plasma. Applications of vacuum plasma. Conclusion. 2
  3. 3. 3
  4. 4. Examples 4
  5. 5. Fundamental questions 1. Nature of plasma. 2. Fundamental properties. 3. Types of plasma. 5
  6. 6. 6
  7. 7. Plasma Components Plasma is 4th state of matter and consists from mix of ions, electrons, atoms, molecules. 7
  8. 8. Types of Plasma 1. Ionized gas. More understanding. 2. Ionized solid state (Example: ionized semiconductors ( Fast ionized dinistors)). 3. Ionized liquid (Example: breakdown of water or oil). 4. Dust plasma. 5. Cluster plasma (Example: evaporated plasma in electron source). 8
  9. 9. Main parameters of plasma 1. Density Ne – number of electrons in volume, 1/cm3. 2. Temperature T, [eV]. 1 eV = 11606 K ~ 104K. mv 2 3 e U    kT 2 2 eU[J] eU[eV] kT[J] T[eV] 3. Langmuir frequency- plasma frequency: 9
  10. 10. Main directions 1. Methods and devices for forming of plasma. 2. Applications of plasma in science, technology and industry. 10
  11. 11. Methods and devices for forming of plasma It is very complicated area: 1. Fundamental knowledge and understanding of plasma physics. 2. Knowledge and experience in electrical engineering. 11
  12. 12. Main tasks 1. Forming of volume plasma. 2. Forming of large cross section plasma 12
  13. 13. Passive and active generation of plasma 1. Passive generation of plasma: Thermal ionization and chemical processes. 2. Active generation of plasma: Ionization of atoms & molecules by external active energy source. 13
  14. 14. General structure of active plasma source 14
  15. 15. Gas plasma Electrical field Electrons Ionization Excitation Dissociation GAS PLASMA External particles, protons, muons, ions, X-rays, UV, Laser 15
  16. 16. Atmosphere plasma Atmosphere plasma – generation of plasma for pressure 760 Torr. Hard conditions: variation of temperature, humanity. The types of plasma: 1. Pulsed plasma. 2. DC 3. AC, RF MW plasma 16
  17. 17. Atmosphere plasma 1. Corona discharge. 2. Barrier Dielectric Discharge 3. Arc. 4. Pulsed discharge. 5. Gliding discharge. 17
  18. 18. Types of pulsed plasma generators SWITCHES HIGH VOLTAGE POWER SUPPLY CHARGE POWER SUPPLY R SWITCH PLASMA L C C HVD Rcur PIN ELECTRODE PLATE ELECTRODE CURRENT TRANSFORMER SWITCH DIELECTRIC METAL PLATE CHARGE POWER SUPPLY C L METAL GRID METAL ELECTRODE 18 SCOPE
  19. 19. Atmosphere pressure plasma generator 19
  20. 20. Pulsed High Voltage Generators 1. Nanosecond generator with high repetition. 2. Picosecond generators with high repetition.. 20
  21. 21. Pulsed High Voltage Generators 1. Induction energy storage. 2. Capacitor energy storage. 3. Combined capacitor-induction energy storages. 21
  22. 22. Pulsed High Voltage Generators 1. Novel switches based on open semiconductors. 2. Hydrogen Thyrotrons. 22
  23. 23. High Pressure gas plasma Main reason of increasing pressure is increasing of electrical insulation. Gas sparks for high voltage and pulsed power equipment. Different gases: N2, SF6, N2+CO. 23
  24. 24. Ionization of gas by charged particles  Ionization gas by charged particles is effective method for generation of volume plasma. 24
  25. 25. Vacuum plasma 1. Forming of plasma for glow discharge . 2. Forming of clusters high energy plasma for technical vacuum. 3. Forming of magnetron discharge. 25
  26. 26. Applications of plasma in Industry Applications of atmospheric and vacuum plasma 26
  27. 27. Atmospheric plasma Positive Problem Pressurized plasma State between liquid and gas Materials science & technology High voltage engineering Large cross section Plasma chemistry Environmental applications Pulsed power technologies Instrumentation & diagnostics 27
  28. 28. Vacuum plasma Positive High purity matter Materials science & technology Problem Large cross section Vacuum plasma Clusters and fractal technologies Generation of beams Microwave and pulsed power technologies Instrumentation & diagnostics New state of matter 28
  29. 29. Conclusion The plasma physics is interesting and opened field of Physics for new discoveries. . 29
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