Upgrade of the JET far infrared interferometer diagnostic.
Rev Sci Instrum
; 83(10): 10E341, 2012 Oct.
Article
in En
| MEDLINE
| ID: mdl-23130803
ABSTRACT
In recent years there has been a major upgrade of the JET far infrared diagnostic system consisting of a new laser system with the wavelength at 118.8 µm at and more advanced processing electronics for phase counting. This provides a second colour measurement of the electron plasma density on the vertical system. Due to the shorter wavelength, the plasma induced laser beam refraction is reduced by a factor of three alleviating density errors caused by loss of signal (so-called "fringe jumps" [A. Murari et al., Rev. Sci. Instrum. 77, 073505 (2006)]), in particular during high performance plasmas experiments in JET.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Type of study:
Diagnostic_studies
Language:
En
Journal:
Rev Sci Instrum
Year:
2012
Document type:
Article