Visible Wavelength Interferometer for High Speed Electron Density Diagnostics
Abstract
A high-speed interferometer for measuring line integrated electron- densities produced by the ETA and ATA charged particle beams has been constructed and tested. The device is configured such that only passive, radiation resistant components are in the measurement area, while the active components -- detectors, electronics, and cw visible wavelength laser -- are remotely grouped within a portable screened enclosure. Scene and reference beam beams communicate between the two areas over a common optical path, insensitive to atmospheric distortions. Active feedback maintains system balance. A differential detection scheme is sensitive to phase information only, reducing photon shot noise and other sources of amplitude modulation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1984
- Accession Number
- ADA145686
Entities
People
- D. Reilly