[A measurement of spontaneous magnetic field by satellites structures of harmonic spectrum].
← Research streamUsing an optical multi-channel spectrometer to measure satellite structures of 2ω0 and 3ω0 harmonic spectra during femtosecond laser–solid target interactions, red-shifted harmonic satellite structures were observed. At an intensity of approximately 10^18 W·c…
Study snapshot
Abstract
The satellites structures of doubling harmonic spectrum and tripling harmonic spectrum were measured at the reflection direction of laser wave from the front side of targets, employing OMA optical multi-channel spectrometer during the interactions of femtosecond laser with solid targets. The satellites structures of red-shift harmonic spectrum of 2omega0 and 3omega0 were observed. Under the intensity of approximately 10(18) W x cm(-2), the result of measurement indicates that the spontaneous magnetic field was all less than 1 MGs level by analyzing the satellites structures of doubling harmonic spectrum and tripling harmonic spectrum during the laser-plasma interaction. With increasing the intensity of the laser pulse, the peak of the red-shift moves further to the long wavelength side causing the broadening of the spectrum. The measurements of the spontaneous magnetic field provide a basis of diagnosing the movement of the critical surface in the laser-plasma interaction process.
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.
Main findings
Using an optical multi-channel spectrometer to measure satellite structures of 2ω0 and 3ω0 harmonic spectra during femtosecond laser–solid target interactions, red-shifted harmonic satellite structures were observed. At an intensity of approximately 10^18 W·cm^-2, analysis of these satellite structures indicated the spontaneous magnetic field was less than 1 MGs. Increasing laser pulse intensity shifted the red-shift peak further to longer wavelengths and broadened the spectrum.
Outcomes measured
- spontaneous magnetic field magnitude during laser-plasma interaction
- satellite structures of doubling (2ω0) and tripling (3ω0) harmonic spectra
- red-shift and spectral broadening with increasing laser intensity
View raw extracted JSON
{
"study_type": "other",
"exposure": {
"band": null,
"source": "laser-plasma interaction (femtosecond laser with solid targets)",
"frequency_mhz": null,
"sar_wkg": null,
"duration": null
},
"population": null,
"sample_size": null,
"outcomes": [
"spontaneous magnetic field magnitude during laser-plasma interaction",
"satellite structures of doubling (2ω0) and tripling (3ω0) harmonic spectra",
"red-shift and spectral broadening with increasing laser intensity"
],
"main_findings": "Using an optical multi-channel spectrometer to measure satellite structures of 2ω0 and 3ω0 harmonic spectra during femtosecond laser–solid target interactions, red-shifted harmonic satellite structures were observed. At an intensity of approximately 10^18 W·cm^-2, analysis of these satellite structures indicated the spontaneous magnetic field was less than 1 MGs. Increasing laser pulse intensity shifted the red-shift peak further to longer wavelengths and broadened the spectrum.",
"effect_direction": "unclear",
"limitations": [],
"evidence_strength": "insufficient",
"confidence": 0.66,
"peer_reviewed_likely": "yes",
"keywords": [
"femtosecond laser",
"solid targets",
"laser-plasma interaction",
"harmonic spectrum",
"second harmonic (2ω0)",
"third harmonic (3ω0)",
"satellite structures",
"red-shift",
"spontaneous magnetic field",
"optical multi-channel spectrometer"
],
"suggested_hubs": []
}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: Not supplied
PubMed: 18306761