Comment on 'Shock-wave-induced enhancement of optical emission in nitrogen afterglow plasma'

doi:10.1103/PHYSREVE.75.018401

Title: Comment on 'Shock-wave-induced enhancement of optical emission in nitrogen afterglow plasma'

Full Record
Similar

Abstract

Sieffert et al. [Phys. Rev. E 72, 066402 (2005)] have recently presented experimental results on optical emission enhancement at the front of shockwaves propagating in nitrogen afterglow. They claim that their results point to local heating of electrons at the shock front. In this Comment it is shown that the observed emission enhancement can be explained on the basis of a commonly accepted model of nitrogen discharge and afterglow, so that the use of unfounded assumption of local electron heating is not required.

Authors:

Naidis, G. V. ^[1]

Institute for High Temperatures, Russian Academy of Sciences, Moscow 125412 (Russian Federation)

Publication Date:: Mon Jan 15 00:00:00 EST 2007

OSTI Identifier:: 21072286

Resource Type:: Journal Article

Resource Relation:: Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; Journal Volume: 75; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevE.75.018401; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AFTERGLOW; ELECTRONS; EMISSION; NITROGEN; PLASMA; PLASMA HEATING; SHOCK WAVES; WAVE PROPAGATION

Citation Formats


                    Naidis, G. V. Comment on 'Shock-wave-induced enhancement of optical emission in nitrogen afterglow plasma'.  United States: N. p., 2007. 
        Web.  doi:10.1103/PHYSREVE.75.018401.

Copy to clipboard


                    Naidis, G. V. Comment on 'Shock-wave-induced enhancement of optical emission in nitrogen afterglow plasma'.  United States.  doi:10.1103/PHYSREVE.75.018401.

Copy to clipboard


                    Naidis, G. V. Mon .  
        "Comment on 'Shock-wave-induced enhancement of optical emission in nitrogen afterglow plasma'".  United States.  
        doi:10.1103/PHYSREVE.75.018401.

Copy to clipboard


                    
@article{osti_21072286,

  title        = {Comment on 'Shock-wave-induced enhancement of optical emission in nitrogen afterglow plasma'},

  author       = {Naidis, G. V.},

  abstractNote = {Sieffert et al. [Phys. Rev. E 72, 066402 (2005)] have recently presented experimental results on optical emission enhancement at the front of shockwaves propagating in nitrogen afterglow. They claim that their results point to local heating of electrons at the shock front. In this Comment it is shown that the observed emission enhancement can be explained on the basis of a commonly accepted model of nitrogen discharge and afterglow, so that the use of unfounded assumption of local electron heating is not required.},

  doi          = {10.1103/PHYSREVE.75.018401},

  journal      = {Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics},

  number       = 1,

  volume       = 75,

  place        = {United States},

  year         = {Mon Jan 15 00:00:00 EST 2007},

  month        = {Mon Jan 15 00:00:00 EST 2007}

}

Copy to clipboard

Journal Article:

DOI: 10.1103/PHYSREVE.75.018401

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Shock-wave-induced enhancement of optical emission in nitrogen afterglow plasma

Siefert, N. ; Ganguly, B.N. ; Bletzinger, P. - Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

This paper reports measurements of optical emission enhancement at the shock front of Mach 1.5 to Mach 3.5 shockwaves propagating in the afterglow of a 0.75 Torr nitrogen glow discharge. Electrically-generated shocks pass through the afterglow and create noticeable enhancements of the B {sup 3}{pi}{sub g}-A {sup 3}{sigma}{sub u}{sup +} and C {sup 3}{pi}{sub u}-B {sup 3}{pi}{sub g} transitions of nitrogen. Under our discharge conditions, the electron Debye length was approximately the same magnitude as the shock thickness; this allows the possibility of a space-charge region extending beyond the neutral shockwave discontinuity. Previous researchers have measured enhancement in the Bmore »« less
DOI: 10.1103/PHYSREVE.72.0
Erratum: Shock-wave-induced enhancement of optical emission in nitrogen afterglow plasma [Phys. Rev. E 72, 066402 (2005)]

Siefert, N. ; Ganguly, B.N. ; Bletzinger, P - Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

No abstract prepared.
DOI: 10.1103/PHYSREVE.73.0
Emission and shock visualization in nonequilibrium nitrogen afterglow plasma

Adamovich, Igor V. ; Rich, J. William - Journal of Applied Physics

Kinetic modeling of propagating and stationary normal shocks in nonequilibrium nitrogen afterglow plasma is used to simulate the results of shock emission measurements in nitrogen afterglow. Emission intensity overshoot behind the shock predicted by the model is in satisfactory agreement with the experimental results and is consistent with previous analytic estimates. The model demonstrates that the first and the second positive band emission overshoot behind the shock are produced by energy transfer processes among the triplet electronic states of nitrogen generated in the electric discharge. On the other hand, charge separation and ambipolar electric field produced across the shock layermore »« less
DOI: 10.1063/1.2798984
GRB 091208B: FIRST DETECTION OF THE OPTICAL POLARIZATION IN EARLY FORWARD SHOCK EMISSION OF A GAMMA-RAY BURST AFTERGLOW

Uehara, T. ; Chiyonobu, S. ; Fukazawa, Y. ; ... - Astrophysical Journal Letters

We report that the optical polarization in the afterglow of GRB 091208B is measured at t = 149-706 s after the burst trigger, and the polarization degree is P = 10.4( {+-} 2.5%. The optical light curve at this time shows a power-law decay with index -0.75 {+-} 0.02, which is interpreted as the forward shock synchrotron emission, and thus this is the first detection of the early-time optical polarization in the forward shock (rather than that in the reverse shock reported by Steele et al.). This detection disfavors the afterglow model in which the magnetic fields in the emissionmore »« less
DOI: 10.1088/2041-8205/752/1/L6
Enhancement of optical emission and ion currents in a laser produced silicon plasma by femtosecond laser-induced periodic surface structuring

Anoop, K. K. ; Verma, Nancy ; Joy, Nithin ; ... - Physics of Plasmas
DOI: 10.1063/1.5038913