https://doi.org/10.1140/epjd/e2015-50726-3
Regular Article
Electron cyclotron emission diagnostics on HT-7 tokamak
1 Institute of Space
Technology, P.O. Box
2750, 44000
Islamabad,
Pakistan
2 Institute of Plasma Physics, Chinese
Academy of Sciences, P. O. Box
1126, Hefei, Anhui
230031, P.R.
China
a e-mail: msajjadus@yahoo.com
Received:
2
October
2014
Received in final form:
3
March
2015
Published online:
15
May
2015
An electron cyclotron emission (ECE) diagnostic system measures the electron cyclotron emission from optically thick plasma that is limited to the blackbody radiation limit of the plasma at the cyclotron resonance location. This provides an electron temperature profile for plasmas with spatially varying magnetic fields, such as a tokamak. The second harmonic x-mode electron cyclotron emission (ECE) at frequency range 98–126 GHz is normally used in HT-7 tokamak to measure electron temperature, which is the only ECE detectable mode with optical depth >1. The theoretical review of ECE emission and its radiometry is briefly summarized.
Key words: Plasma Physics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2015