Accession Number:

AD0738306

Title:

Design, Development, and Application of a Complete Analog Plasma-Diagnostic System.

Descriptive Note:

Technical rept.,

Corporate Author:

SYSTEMS RESEARCH LABS INC DAYTON OHIO

Report Date:

1971-09-01

Pagination or Media Count:

25.0

Abstract:

The simple electronic diagnostic system described provides a calibrated oscilloscope display of a Langmuir-probe I-V characteristic, its first- and second-derivative curves, the electron-energy distribution function, and the cumulative electron number density. The system also provides a simple method for determining plasma potential and--if it exists--the electron temperature. Data taken in a low-temperature mercury discharge is compared with data taken by means of the well-known harmonic second-derivative technique. An electron number density of 4.9 x 10 to the 16th powercubic meter and an electron temperature of 9,700 degrees K found with the new system compare very favorably to values of 4.7 x 10 to the 16th powercubic meter and 9900 degrees K determined from the harmonic second-derivative data. The system described features more rapid data reduction and lower cost than existing harmonic systems. A detailed design procedure for construction of the accurate differentiators is given. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE