(レーザー関連)アメリカ・ローレンス・リバモア国立研究所/When lasers cross: LLNL finds a brighter way to measure plasma

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This artist’s conception shows the novel crossed-beam energy transfer (CBET) technique for measuring plasma conditions. The pump beam, shown with red wavelengths, is intersected by a weaker broadband probe beam, shown with multiple colors. Information about the plasma’s conditions is imprinted on to the spectrum of the probe beam via energy transferred from the pump beam via plasma waves. (Credit: Mark Meamber/LLNL)

Measuring conditions in volatile clouds of superheated gases known as plasmas are central to pursuing greater scientific understanding of how stars, nuclear detonations and fusion energy work. For decades, scientists have relied on a technique called Thomson scattering, which uses a single laser beam to scatter from plasma waves as a way to measure critical information such as plasma temperature, density and flow.

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