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Balloon-borne ion sampling package.

J R Olson1, R C Amme, J N Brooks

  • 1Department of Physics, University of Denver, Denver, CO 80208, USA.

The Review of Scientific Instruments
|May 1, 1978
PubMed
Summary
This summary is machine-generated.

A new mass filter package samples stratospheric ions, detecting both positive and negative ions. Preliminary results suggest the presence of hydrated protons in the stratosphere.

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Area of Science:

  • Atmospheric science
  • Astrochemistry
  • Ion physics

Background:

  • Stratospheric ion composition is crucial for understanding atmospheric chemistry and aerosol formation.
  • Previous methods for in-situ stratospheric ion analysis faced limitations in mass range and sensitivity.

Purpose of the Study:

  • To design and construct a mass filter package for in-situ measurement of stratospheric positive and negative ions.
  • To analyze the mass-to-charge ratio of ions in the stratosphere (1-150 amu).
  • To investigate the presence of specific ion species, such as hydrated protons.

Main Methods:

  • Development of a quadrupole mass filter with a 1-150 amu range, capable of fixed peak or continuous sweep operation.
  • Integration of ion counting, ambient condition sensors (temperature, pressure, conductivity), and cosmic ray detectors.
  • Utilizing a valved orifice for atmospheric sampling designed to minimize contamination.
  • Employing on-board data recording and telemetry for real-time analysis.

Main Results:

  • Successful design and construction of a stratospheric mass filter package for positive ion (PI) and negative ion (NI) detection.
  • Demonstrated capability for individual ion counting across a wide mass range (1-150 amu).
  • Preliminary flight data indicate evidence for the existence of hydrated protons in the stratosphere.

Conclusions:

  • The developed mass filter package is a viable tool for in-situ stratospheric ion composition studies.
  • The detection of hydrated protons suggests their potential role in stratospheric ion chemistry.
  • Further analysis of data from this instrument can enhance our understanding of stratospheric processes.