Plasma science and applications 2013

  • 1,481 views
Uploaded on

 

More in: Technology , Business
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
1,481
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
891
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Plasma Physics: Fundamentals and Applications Dr. Sergey Korenev 1
  • 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
  • 4. Examples 4
  • 5. Fundamental questions 1. Nature of plasma. 2. Fundamental properties. 3. Types of plasma. 5
  • 6. 6
  • 7. Plasma Components Plasma is 4th state of matter and consists from mix of ions, electrons, atoms, molecules. 7
  • 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. 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. Main directions 1. Methods and devices for forming of plasma. 2. Applications of plasma in science, technology and industry. 10
  • 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. Main tasks 1. Forming of volume plasma. 2. Forming of large cross section plasma 12
  • 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. General structure of active plasma source 14
  • 15. Gas plasma Electrical field Electrons Ionization Excitation Dissociation GAS PLASMA External particles, protons, muons, ions, X-rays, UV, Laser 15
  • 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. Atmosphere plasma 1. Corona discharge. 2. Barrier Dielectric Discharge 3. Arc. 4. Pulsed discharge. 5. Gliding discharge. 17
  • 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. Atmosphere pressure plasma generator 19
  • 20. Pulsed High Voltage Generators 1. Nanosecond generator with high repetition. 2. Picosecond generators with high repetition.. 20
  • 21. Pulsed High Voltage Generators 1. Induction energy storage. 2. Capacitor energy storage. 3. Combined capacitor-induction energy storages. 21
  • 22. Pulsed High Voltage Generators 1. Novel switches based on open semiconductors. 2. Hydrogen Thyrotrons. 22
  • 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. Ionization of gas by charged particles  Ionization gas by charged particles is effective method for generation of volume plasma. 24
  • 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. Applications of plasma in Industry Applications of atmospheric and vacuum plasma 26
  • 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. 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. Conclusion The plasma physics is interesting and opened field of Physics for new discoveries. . 29
  • 30. 30