Ammonia measurements with femtosecond laser-induced plasma spectroscopy

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Abstract

Femtosecond laser-induced plasma spectroscopy for in situ ammonia (NH 3 ) measurements was demonstrated in NH 3 ∕N 2 mixtures. When a femtosecond laser at 800 nm was focused at the flow field, the parent NH 3 molecules would be photolyzed to generate electronics excited NH fragments, and then indirect measurements of NH 3 could be realized by detecting the NH fluorescence (A 3 Π − X 3 Σ ) at 336 nm. A detection limit of 205 ppm was achieved. This work is the first attempt, to the best of our knowledge, for ammonia measurements with a femtosecond laser, and the results are useful for the development of ammonia diagnostics.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Tianjin University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Atom- och molekylfysik och optik
Originalspråkengelska
Sidor (från-till)1210-1214
Antal sidor5
TidskriftApplied Optics
Volym58
Utgivningsnummer5
StatusPublished - 2019 feb 10
PublikationskategoriForskning
Peer review utfördJa