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Electric field in a plasma channel in a high-pressure nanosecond discharge in hydrogen: a coherent anti-stokes Raman scattering study.

Physical review letters · 2013 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3121

In a hydrogen nanosecond discharge (2–3×10^5 Pa) ignited by a ~100 kV, ~5 ns pulse, an electric field was observed in the plasma channel with root-mean-square intensities up to 30 kV/cm. Polarization measurements indicated the field direction is along the cat…

Study snapshot

PublicationPhysical review letters · 2013
Study typeengineering
Reported directionUnclear
Evidence ratingInsufficient

Abstract

Experimental results of a study of the electric field in a plasma channel produced during nanosecond discharge at a H2 gas pressure of (2-3)×10(5)  Pa by the coherent anti-Stokes scattering method are reported. The discharge was ignited by applying a voltage pulse with an amplitude of ∼100  kV and a duration of ∼5  ns to a blade cathode placed at a distance of 10 and 20 mm from the anode. It was shown that this type of gas discharge is characterized by the presence of an electric field in the plasma channel with root-mean-square intensities of up to 30  kV/cm. Using polarization measurements, it was found that the direction of the electric field is along the cathode-anode axis.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering
Effect directionunclear
PopulationNot supplied
Sample sizeNot supplied
Exposure~5 ns voltage pulse
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

In a hydrogen nanosecond discharge (2–3×10^5 Pa) ignited by a ~100 kV, ~5 ns pulse, an electric field was observed in the plasma channel with root-mean-square intensities up to 30 kV/cm. Polarization measurements indicated the field direction is along the cathode–anode axis.

Outcomes measured

  • Electric field intensity in plasma channel (RMS, kV/cm)
  • Electric field direction (cathode-anode axis)
View raw extracted JSON
{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "high-pressure nanosecond gas discharge (plasma channel) in hydrogen",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "~5 ns voltage pulse"
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Electric field intensity in plasma channel (RMS, kV/cm)",
    "Electric field direction (cathode-anode axis)"
  ],
  "main_findings": "In a hydrogen nanosecond discharge (2–3×10^5 Pa) ignited by a ~100 kV, ~5 ns pulse, an electric field was observed in the plasma channel with root-mean-square intensities up to 30 kV/cm. Polarization measurements indicated the field direction is along the cathode–anode axis.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "plasma channel",
    "nanosecond discharge",
    "hydrogen",
    "electric field",
    "coherent anti-Stokes Raman scattering",
    "CARS",
    "high pressure",
    "polarization measurements"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1103/physrevlett.111.255001
PubMed: 24483746

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