A New Time-of-Flight Aerosol Mass Spectrometer (TOF-AMS)—Instrument Description and First Field Deployment

We report the development and first field deployment of a new version of the Aerosol Mass Spectrometer (AMS), which is capable of measuring non-refractory aerosol mass concentrations, chemically speciated mass distributions and single particle information.The instrument was constructed by interfacing the well-characterized Aerodyne AMS vacuum system, particle focusing, sizing, and evaporation/ionization components, with a compact TOFWERK orthogonal acceleration reflectron time-of-flight mass spectrometer.In this time-of-flight aerosol mass spectrometer (TOF-AMS) aerosol particles are focused by an aerodynamic lens assembly as a narrow beam into the vacuum chamber.Non-

• UE
  U.S. Environmental Protection Agency
• NY
  New York State Energy Research and Development Authority
• SU
  State University of New York
• AS
  Advanced Storage Research Consortium
• IM
  International Max Planck Research School for Environmental, Cellular and Molecular Microbiology
• UA
  University at Albany
• OO
  Office of Naval Research