METHOD OF MEASURING TIME RESOLVED ELECTRON DENSITY AND ION TEMPERATURE OF PLASMAS WITH A FABRY-PEROT ETALON. Rtjnhuizen Report No. 64-17

Technical Report · Wed Jan 01 04:00:00 EST 1964

OSTI ID:4006576

Mewe, R; De Vries, R F

Electron density and ion temperatures in the regions 10/sup 14/-- 10/sup 16/ cm/sup -3/ and 10/sup 5/-- 10/sup 8 deg K respectively can be obtained from the Stark and Doppler broadening of spectral lines. Measurements can be performed with a Fabry-Perot etalon which has spacers of thickness less than 1 mm. A simple method is presented for obtaining the time-resolved haifwidth of spectral lines with a time resolution better than 0.1 mu sec during a scan of about 10 mu sec. From the ratio of the minimum and the maximum intensity in the Haidinger pattern, the true half-width of a spectral line can be determined, assuming the spectral line has a Voigt profile. As an example the profiles of the Balmer lines H/sub BETA / and H/sub delta / and of He II lambda 3203 according to the Griem-Kolb-Shen theory, are approximated by Voigt profiles for several ion temperatures. From the full half-width of these profiles the electron density can be obtained. (auth)

• Research Organization: Stichting Voor Fundamenteel Onderzoek der Materie. Instituut Voor Piasma-Fysica, Jutphaas, Netherlands
• NSA Number: NSA-18-021384
• OSTI ID: 4006576
• Report Number(s): NP-13853
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

DENSITY
ELECTRIC FIELDS
ELECTRONS
ENERGY RANGE
FABRY-PEROT INTERFEROMETER
HELIUM
HYDROGEN
IONS
KEV RANGE
MEASURED VALUES
PHYSICS
PLASMA
RESOLUTION
SPECTRA
SPECTRAL SHIFT
SPECTROMETERS
STARK EFFECT
TEMPERATURE