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Low energy stable plasma calibration facility.

K M Frederick-Frost1, K A Lynch

  • 1Physics and Astronomy Department, Wilder Laboratory, Dartmouth College, Hanover, New Hampshire 03755, USA. kristen.frederick-frost@unh.edu

The Review of Scientific Instruments
|August 4, 2007
PubMed
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A new low energy plasma calibration facility was developed for testing rocket-borne detectors and simulating ionospheric plasma sheaths. It offers adjustable plasma parameters, crucial for understanding space plasma environments.

Area of Science:

  • Space Physics
  • Plasma Physics
  • Instrument Calibration

Background:

  • Rocket-borne charged-particle detectors require accurate calibration.
  • Understanding plasma sheath formation is critical for space missions.
  • Ionospheric plasma conditions present unique challenges for detector calibration.

Purpose of the Study:

  • To design and fabricate a low energy plasma calibration facility.
  • To test and calibrate rocket-borne charged-particle detectors.
  • To investigate plasma sheath formation in simulated ionospheric conditions.

Main Methods:

  • Modification of a cylindrical microwave resonant plasma source.
  • Implementation of a stable magnetron operation method.
  • Characterization of plasma parameters including density, electron temperature, and Debye length.

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Main Results:

  • The facility produces unmagnetized plasmas with densities from 1x10^3 to 6x10^5 /cm^3.
  • Electron temperatures range from 0.1 to 1.7 eV, with plasma potentials from 0.5 to 8 V.
  • A constant plasma energy density was observed due to an inverse density-temperature relationship, enabling a wide range of Debye lengths (0.3-8.4 cm).

Conclusions:

  • The developed facility is suitable for calibrating space plasma instruments.
  • The facility effectively simulates ionospheric plasma sheath conditions.
  • The controllable plasma parameters are ideal for studying space plasma phenomena.