Infrared emission spectroscopy of atmospheric-pressure ball plasmoids

Scott E. Dubowsky, Bradley Deutsch, Rohit Bhargava, Benjamin J. McCall

Research output: Contribution to journalArticle

Abstract

We report the first (to our knowledge) infrared emission spectra collected from water-based laboratory ball plasmoid discharges. A "ball plasmoid" results from a unique type of pulsed DC plasma discharge in which a sphere of plasma is seen to grow and eventually separate from a central electrode and last for a few hundred milliseconds without an external power source before dissipating. Typical recombination rates for plasmas at ambient conditions are on the order of a millisecond or less, however ball plasmoids have been observed to last a few hundred milliseconds, and there is no explanation in the literature that fully accounts for this large discrepancy in lifetime. The spectra are dominated by emission from water and from hydroxyl radical; PGOPHER was used to fit the experimental spectra to extract rotational temperatures for these molecules. The temperatures of the bending and stretching modes of H 2 O were determined to be 1900 ± 300 K and 2400 ± 400 K, respectively and the rotational temperature of OH was found to be 9200 ± 1500 K.

Original languageEnglish (US)
Pages (from-to)1-8
Number of pages8
JournalJournal of Molecular Spectroscopy
Volume322
DOIs
StatePublished - Apr 1 2016

Fingerprint

Emission spectroscopy
Atmospheric pressure
balls
Infrared spectroscopy
atmospheric pressure
Plasmas
spectroscopy
Water
hydroxyl radicals
Hydroxyl Radical
Temperature
plasma jets
water
Stretching
temperature
emission spectra
infrared spectra
direct current
Infrared radiation
life (durability)

Keywords

  • Ball lightning
  • Infrared emission spectroscopy PGOPHER
  • Plasma diagnostics
  • Plasmoid
  • Rotational temperature

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry

Cite this

Infrared emission spectroscopy of atmospheric-pressure ball plasmoids. / Dubowsky, Scott E.; Deutsch, Bradley; Bhargava, Rohit; McCall, Benjamin J.

In: Journal of Molecular Spectroscopy, Vol. 322, 01.04.2016, p. 1-8.

Research output: Contribution to journalArticle

Dubowsky, Scott E. ; Deutsch, Bradley ; Bhargava, Rohit ; McCall, Benjamin J. / Infrared emission spectroscopy of atmospheric-pressure ball plasmoids. In: Journal of Molecular Spectroscopy. 2016 ; Vol. 322. pp. 1-8.
@article{3f93bab952f34a749a027e863d27a31c,
title = "Infrared emission spectroscopy of atmospheric-pressure ball plasmoids",
abstract = "We report the first (to our knowledge) infrared emission spectra collected from water-based laboratory ball plasmoid discharges. A {"}ball plasmoid{"} results from a unique type of pulsed DC plasma discharge in which a sphere of plasma is seen to grow and eventually separate from a central electrode and last for a few hundred milliseconds without an external power source before dissipating. Typical recombination rates for plasmas at ambient conditions are on the order of a millisecond or less, however ball plasmoids have been observed to last a few hundred milliseconds, and there is no explanation in the literature that fully accounts for this large discrepancy in lifetime. The spectra are dominated by emission from water and from hydroxyl radical; PGOPHER was used to fit the experimental spectra to extract rotational temperatures for these molecules. The temperatures of the bending and stretching modes of H 2 O were determined to be 1900 ± 300 K and 2400 ± 400 K, respectively and the rotational temperature of OH was found to be 9200 ± 1500 K.",
keywords = "Ball lightning, Infrared emission spectroscopy PGOPHER, Plasma diagnostics, Plasmoid, Rotational temperature",
author = "Dubowsky, {Scott E.} and Bradley Deutsch and Rohit Bhargava and McCall, {Benjamin J.}",
year = "2016",
month = "4",
day = "1",
doi = "10.1016/j.jms.2016.02.005",
language = "English (US)",
volume = "322",
pages = "1--8",
journal = "Journal of Molecular Spectroscopy",
issn = "0022-2852",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Infrared emission spectroscopy of atmospheric-pressure ball plasmoids

AU - Dubowsky, Scott E.

AU - Deutsch, Bradley

AU - Bhargava, Rohit

AU - McCall, Benjamin J.

PY - 2016/4/1

Y1 - 2016/4/1

N2 - We report the first (to our knowledge) infrared emission spectra collected from water-based laboratory ball plasmoid discharges. A "ball plasmoid" results from a unique type of pulsed DC plasma discharge in which a sphere of plasma is seen to grow and eventually separate from a central electrode and last for a few hundred milliseconds without an external power source before dissipating. Typical recombination rates for plasmas at ambient conditions are on the order of a millisecond or less, however ball plasmoids have been observed to last a few hundred milliseconds, and there is no explanation in the literature that fully accounts for this large discrepancy in lifetime. The spectra are dominated by emission from water and from hydroxyl radical; PGOPHER was used to fit the experimental spectra to extract rotational temperatures for these molecules. The temperatures of the bending and stretching modes of H 2 O were determined to be 1900 ± 300 K and 2400 ± 400 K, respectively and the rotational temperature of OH was found to be 9200 ± 1500 K.

AB - We report the first (to our knowledge) infrared emission spectra collected from water-based laboratory ball plasmoid discharges. A "ball plasmoid" results from a unique type of pulsed DC plasma discharge in which a sphere of plasma is seen to grow and eventually separate from a central electrode and last for a few hundred milliseconds without an external power source before dissipating. Typical recombination rates for plasmas at ambient conditions are on the order of a millisecond or less, however ball plasmoids have been observed to last a few hundred milliseconds, and there is no explanation in the literature that fully accounts for this large discrepancy in lifetime. The spectra are dominated by emission from water and from hydroxyl radical; PGOPHER was used to fit the experimental spectra to extract rotational temperatures for these molecules. The temperatures of the bending and stretching modes of H 2 O were determined to be 1900 ± 300 K and 2400 ± 400 K, respectively and the rotational temperature of OH was found to be 9200 ± 1500 K.

KW - Ball lightning

KW - Infrared emission spectroscopy PGOPHER

KW - Plasma diagnostics

KW - Plasmoid

KW - Rotational temperature

UR - http://www.scopus.com/inward/record.url?scp=84958164694&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84958164694&partnerID=8YFLogxK

U2 - 10.1016/j.jms.2016.02.005

DO - 10.1016/j.jms.2016.02.005

M3 - Article

AN - SCOPUS:84958164694

VL - 322

SP - 1

EP - 8

JO - Journal of Molecular Spectroscopy

JF - Journal of Molecular Spectroscopy

SN - 0022-2852

ER -