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- Title
Electron density measurements of a field-reversed configuration plasma using a novel compact ultrastable second-harmonic interferometer.
- Authors
Brandi, F; Giammanco, F; Harris, W S; Roche, T; Trask, E; Wessel, F J
- Abstract
A compact high-sensitivity second-harmonic interferometer for line-integrated electron density measurements on a large plasma machine is presented. The device is based on a fiber coupled near-infrared continuous-wave Nd:YAG laser and is remotely controlled. The performances of the instrument are tested on the Irvine field-reversed configuration machine, and a sensitivity of few 10(14) cm(-2) in measuring line integrated electron density is demonstrated with a time resolution of a few microseconds. The interferometer is self calibrated, has an impressive stability, and it does not require any further alignment after proper installation. These features make this device a real turn-key system suitable for electron density measurement in large plasma machines.
- Publication
The Review of scientific instruments, 2009, Vol 80, Issue 11, p113501
- ISSN
1089-7623
- Publication type
Journal Article
- DOI
10.1063/1.3258199