TIME-SPACE RESOLUTION OF B-FIELDS IN THETA-PINCH PLASMA BY FARADAY ROTATION OF INFRARED MASER RADIATION.
Abstract
A method for experimentally determining the magnetic flux density B as a function of time and space in a dense, extreme temperature, highly dynamic, deuterium plasma was developed. The method employed the 3.39 micron infrared radiation from a HeNe gas maser as a probe. The plasma electron density and the Faraday rotation of the plane of polarization of the maser beam which propagated through the plasma were measured separately. These two measurements and the laws of propagation of electromagnetic waves in a magnetized plasma were used to deduce the magnetic field B in the plasma. A polarization analyzer, useful in the 2 to 4 micron range, was developed as a part of this work. It employs two air-germanium interfaces oriented such that the polarized infrared radiation is incident to the interfaces at the Brewster angle. Two InAs photovoltaic detectors are used. The signals from the two detectors are preamplified and then subtracted and added. The ratio of these difference and sum signals yields the polarization angle of the incident radiation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0812602
Entities
People
- Arwin Adelbert Dougal
- John P. Craig
- Robert F. Gribble
Organizations
- University of Texas at Austin