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PhD_Dissertation_Benjamin_Goldberg.pdf (12.05 MB)

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Electric Field Measurements in Non-Equilibrium ElectricDischarge Plasmas Using Picosecond Four-Wave Mixing

Goldberg, Benjamin M.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1449236861

Abstract Details

2015, Doctor of Philosophy, Ohio State University, Mechanical Engineering.
This dissertation presents the results of development of a picosecond four wave mixing technique and its use for electric field measurements in nanosecond pulse discharges. This technique is similar to coherent anti-Stokes Raman spectroscopy and is well suited for electric field measurements in high pressure plasmas with high spatial and temporal resolution. The results show that the signal intensity scales proportionally to the square of the electric field, the signal is emitted as a coherent beam, and is polarized parallel to the electric field vector, making possible electric field vector component measurements. The signal is generated when a collinear pair of pump and Stokes beams, which are generated in a stimulated Raman shifting cell (SRS), generate coherent excitation of molecules into a higher energy level, hydrogen for the present work. The coherent excitation mixes with a dipole moment induced by an external electric field. The mixing of these three ``waves'' allows the molecules to radiate at their Raman frequency, producing a fourth, signal, wave which is proportional to the square of the electric field. The time resolution of this technique is limited by the coherence decay time of the molecules, which is a few hundred picoseconds.
Igor Adamovich (Advisor)
180 p.
Mechanical Engineering
Optical diagnostics, Electric Field Measurements, Plasma Diagnostics, Four Wave Mixing, Nanosecond Pulse Discharge

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Citations

  • Goldberg, B. M. (2015). Electric Field Measurements in Non-Equilibrium ElectricDischarge Plasmas Using Picosecond Four-Wave Mixing [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449236861

    APA Style (7th edition)

  • Goldberg, Benjamin. Electric Field Measurements in Non-Equilibrium ElectricDischarge Plasmas Using Picosecond Four-Wave Mixing. 2015. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1449236861.

    MLA Style (8th edition)

  • Goldberg, Benjamin. "Electric Field Measurements in Non-Equilibrium ElectricDischarge Plasmas Using Picosecond Four-Wave Mixing." Doctoral dissertation, Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449236861

    Chicago Manual of Style (17th edition)

osu1449236861
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© 2015, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.