Charge and current neutralization of an ion-beam pulse propagating in a background plasma along a solenoidal magnetic field.

Physical review letters · 2007 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3438

Study snapshot

PublicationPhysical review letters · 2007

Study typeother

Reported directionUnclear

Evidence ratingInsufficient

Abstract

The analytical studies show that the application of a small solenoidal magnetic field can drastically change the self-magnetic and self-electric fields of the beam pulse propagating in a background plasma. Theory predicts that when omega_{ce} approximately omega_{pe}beta_{b}, where omega_{ce} is the electron gyrofrequency, omega_{pe} is the electron plasma frequency, and beta_{b} is the ion-beam velocity relative to the speed of light, there is a sizable enhancement of the self-electric and self-magnetic fields due to the dynamo effect. Furthermore, the combined ion-beam-plasma system acts as a paramagnetic medium; i.e., the solenoidal magnetic field inside the beam pulse is enhanced.

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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 typeother

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Analytical theory predicts that applying a small solenoidal magnetic field can drastically change the self-electric and self-magnetic fields of an ion-beam pulse propagating in background plasma. When the electron gyrofrequency approximately equals the electron plasma frequency times the ion-beam beta (ωce ≈ ωpe βb), the self-fields are predicted to be sizably enhanced due to a dynamo effect, and the solenoidal magnetic field inside the beam pulse is enhanced (paramagnetic response).

Outcomes measured

Self-electric field of an ion-beam pulse in background plasma
Self-magnetic field of an ion-beam pulse in background plasma
Solenoidal magnetic field enhancement inside the beam pulse (paramagnetic behavior)

Limitations

Findings are described as analytical/theoretical predictions; no experimental or epidemiological data are mentioned in the abstract.
No quantitative field strengths, frequencies, or exposure metrics are provided in the abstract.

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Self-electric field of an ion-beam pulse in background plasma",
    "Self-magnetic field of an ion-beam pulse in background plasma",
    "Solenoidal magnetic field enhancement inside the beam pulse (paramagnetic behavior)"
  ],
  "main_findings": "Analytical theory predicts that applying a small solenoidal magnetic field can drastically change the self-electric and self-magnetic fields of an ion-beam pulse propagating in background plasma. When the electron gyrofrequency approximately equals the electron plasma frequency times the ion-beam beta (ωce ≈ ωpe βb), the self-fields are predicted to be sizably enhanced due to a dynamo effect, and the solenoidal magnetic field inside the beam pulse is enhanced (paramagnetic response).",
  "effect_direction": "unclear",
  "limitations": [
    "Findings are described as analytical/theoretical predictions; no experimental or epidemiological data are mentioned in the abstract.",
    "No quantitative field strengths, frequencies, or exposure metrics are provided in the abstract."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ion-beam pulse",
    "background plasma",
    "solenoidal magnetic field",
    "electron gyrofrequency",
    "electron plasma frequency",
    "dynamo effect",
    "paramagnetic medium",
    "self-electric field",
    "self-magnetic field"
  ],
  "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.99.235002
PubMed: 18233377

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