@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://gcmd.gsfc.nasa.gov/kms#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/46238695-5577-4fad-91bf-0a2fdf8a9b19>
  skos:prefLabel "Lidar/Laser Spectrometers"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/a211773e-5959-40dc-8b33-f7d5880d57f3> .

<https://gcmd.earthdata.nasa.gov/kms/concept/a211773e-5959-40dc-8b33-f7d5880d57f3>
  ns0:altLabel [ ] ;
  skos:definition """Particle Analysis by Laser Mass Spectrometry (PALMS) is a laser
ionization mass spectrometer which makes in-situ measurements of
the chemical composition of individual aerosol
particles. Aerosols are brought into a vacuum system and
individual particles are detected by light scattered as they
cross the beam of a continuous laser. The scattered light signal
gives a rough indication of the size of the particle and
provides a trigger for an excimer laser (193nm), which is pulsed
so its beam hits the particle to ionize molecules and
atoms. These ions are analyzed with a time of flight mass
spectrometer to provide a complete mass spectrum from each
particle. The instrument is capable of measuring particles from
0.2 to 3 microns in diameter. Analysis is complete less then 1
millisecond after the aerosols enter the inlet. The instrument
can acquire either positive or negative ion spectra."""@en ;
  skos:prefLabel "PALMS"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/46238695-5577-4fad-91bf-0a2fdf8a9b19> ;
  a skos:Concept .